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WindowsXP/base/mvdm/dos/v86/doskrnl/bios/dskio.asm
Tanishq Dubey cb60ae51e5
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2025-04-27 07:49:33 -04:00

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PAGE 109,132
TITLE MS-DOS 5.0 DSKIO.ASM
;************************************************************************
;* *
;* *
;* MODULE NAME: DSKIO *
;* *
;* *
;* COPYRIGHT (C) NEC CORPORATION 1990 *
;* *
;* NEC CONFIDENTIAL AND PROPRIETARY *
;* *
;* All rights reserved by NEC Corporation. *
;* this program must be used solely for *
;* the purpose for which it was furnished *
;* by NEC Corporation. No past of this program *
;* may be reproduced or disclosed to others, *
;* in any form, without the prior written *
;* permission of NEC Corporation. *
;* Use of copyright notice does not evidence *
;* publication of this program. *
;* *
;************************************************************************
;
; CORRECTION HISTORY
; 84/11/16 SURE TO BEHAVE AS SINGLE DRIVE
; 85/03/01 AI RESULT
; 85/03/05 BI-MEDIA DRIVE
; 85/04/01 ADDING B4670-CODE
; 85/04/11 2D MEDIA SUPPORT
; 85/05/05 B4670 ( VIRTUAL VOLUME ACCESS )
; 85/05/06 ABOUT 640/1M MEDIA WITH ERROR ( & B4670 )
; 85/05/07 - 10 B4670 ( ABOUT VIRTUAL HD & 5" 8/9 SECTORS )
; 85/05/12 ENABLE 256KB MEDIA ACCESS
; 85/05/14 l-bps(xa-hd) is 1024b(old is 512b)
; 85/05/15 B4670 DATA to "BIO2" MODULE
; 85/05/17 B4670 ( DIC I/O SUPPORT )
; 85/10/02 ENHANCEMENT FOR DOS 3.XX
; 85/10/25 40 MB BUG-FIX
; 86/10/31 X21 B4670 VHDSK BY QNES
;---------------------------------------------------------------------
; 87/10/06 BUG FIXED (PC-1424 & PATCH#242) & (PC-1160)
; 88/03 - 88/05 MS-DOS 3.3
;
; 90/11,12 MS-DOS 5.0
;
;
PAGE
;****************************************************************
;
; WE DEFINED PRE-DENSITY TABLE AS FOLLOWS.
;
; <PREDENST> FOR 1MB INTERFACE
;
; 0 : 256KB
; 1 : 1MB ( '2HD' 8 SECTORS/TRACK )
; 2 : -----
; 3 : 1MB ( '2HC' 15 SECTORS/TRACK - IBM PC/AT FORMAT )
; 4 : 160KB ( '1D' 8 SECTORS/TRACK )
; 5 : 180KB ( '1D' 9 SECTORS/TRACK )
; 6 : 320KB ( '2D' 8 SECTORS/TRACK )
; 7 : 360KB ( '2D' 9 SECTORS/TRACK )
; 8 : 640KB ( '2DD' 8 SECTORS/TRACK )
; 9 : 720KB ( '2DD' 9 SECTORS/TRACK )
;
; <PREDENS5> FOR 640B INTERFACE
;
; 0 : 160KB ( '1D' 8 SECTORS/TRACK )
; 1 : 180KB ( '1D' 9 SECTORS/TRACK )
; 2 : 320KB ( '2D' 8 SECTORS/TRACK )
; 3 : 360KB ( '2D' 9 SECTORS/TRACK )
; 4 : 640KB ( '2DD' 8 SECTORS/TRACK )
; 5 : 720KB ( '2DD' 9 SECTORS/TRACK )
; 6 : 1MB ( '2HD' 8 SECTORS/TRACK )
; 7 : 1MB ( '2HC' 15 SECTORS/TRACK - IBM PC/AT FORMAT )
; 8 : 256KB
; 9 : -----
;
;***************************************************************
BRANCH = 0 ;ASSEMBLE SWITCH 871002
HDSASI = 0 ; 88/03/25
HDSCSI = 0 ; 88/03/25
;
; This file defines the segment structure of the BIOS.
; It should be included at the beginning of each source file.
; All further segment declarations in the file can then be done by just
; by specifying the segment name, with no attribute, class, or align type.
datagrp group Bios_Data,Bios_Data_Init
Bios_Data segment word public 'Bios_Data'
Bios_Data ends
Bios_Data_Init segment word public 'Bios_Data_Init'
Bios_Data_Init ends
Filler segment para public 'Filler'
Filler ends
Bios_Code segment word public 'Bios_Code'
Bios_Code ends
Filler2 segment para public 'Filler2'
Filler2 ends
SysInitSeg segment word public 'system_init'
SysInitSeg ends
Bios_Data segment word public 'Bios_Data'
ASSUME CS:BIOS_DATA,DS:DATAGRP
EXTRN BIOS_FLAG:BYTE,EXLPTBL:WORD
EXTRN S_R8:BYTE
EXTRN HD_OFFSET:WORD,HD1_OFFSET:WORD
EXTRN HD_LAST:WORD,HD1_LAST:WORD
EXTRN DSK_BUF:NEAR
EXTRN DRV_NUM:BYTE
EXTRN EXIT:FAR,ERR_EXIT:FAR,BUS_EXIT:FAR
EXTRN PTRSAV:DWORD
EXTRN DSK8_SNG:NEAR,DSK8_DBL:NEAR
EXTRN DSK5_SNG8:NEAR,DSK5_DBL8:NEAR,DSK5_SNG9:NEAR,DSK5_DBL9:NEAR
EXTRN DSK5_DBL8D:NEAR,DSK5_DBL9D:NEAR,DSK_AT:NEAR
EXTRN HDDSK5_1:NEAR,HDDSK5_2:NEAR
; EXTRN HDIO_FLG:BYTE
EXTRN HD_LNG:WORD
EXTRN DSK_TYP:BYTE,COM:BYTE,COM1:BYTE
EXTRN LNG_TRNS:WORD,CUR_TRNS:WORD,NO_TRNS:WORD,MAX_TRNS:WORD
EXTRN PREFAT:BYTE,PREDNST:BYTE,PRVDRV:BYTE
EXTRN S_SEC:WORD,LNG_SEC:WORD,VRFY_FLG:BYTE,RTRY_CNT:BYTE
EXTRN RW_SW:BYTE
EXTRN SW_HD:BYTE,SW_5:BYTE,EXTSW:BYTE,VOLNUM:BYTE
EXTRN CURUA:BYTE,CURDA:BYTE,CURDRV:BYTE
EXTRN BPS:WORD,BPS1:WORD,BIDTBL:BYTE,CURDA2:BYTE
IF BRANCH ;--------------------------------------- 871002 ------
;
; B4670-CODE DATA
;
EXTRN VDSK_AI:BYTE,VDSK_TYP:BYTE
EXTRN FSTDRV:BYTE ;850517
EXTRN X2_SW_VT:BYTE,VT_OFFSET:WORD,VT_LAST:WORD ;850515
EXTRN VBPB:NEAR,VCPV:WORD,VBPS:WORD,VTPC:BYTE ;850515
EXTRN VSPT:BYTE ;850515
ENDIF ;-------------------------------------------------------------
EXTRN HD_CAP:BYTE,HD_SPT:BYTE,HD_HED:BYTE
EXTRN CHR_X2:BYTE,HD_LBL:BYTE ;DEL(VT_BPB) 850505
EXTRN BT_TYP:BYTE
EXTRN SVPTR2:WORD,SVPTR1:WORD
EXTRN SVPTR:WORD,HD_NUM:BYTE,HD1_NUM:BYTE
EXTRN PREFAT8:BYTE ;850610
;
; DOS 3.XX ONLY
;
; EXTRN VOLTABLE:BYTE ;BDS USED
EXTRN REFCNT:BYTE,BYTPSEC:WORD
;-------------------------------------------------- H/N DOS 870827--------
EXTRN PUA:BYTE,PWINF:BYTE,SNRST1:BYTE
EXTRN PREDENS5:BYTE,BIDTBL5:BYTE,SAVEAL:BYTE
EXTRN OPMOD:BYTE,OPMOD5:BYTE,FSW5:BYTE
EXTRN SNGDRV_FLG:BYTE
;---------------------------------------------------------------------
EXTRN SYS_500:BYTE,SYS_501:BYTE,N5FD:BYTE
;---------------------------------------------------------------------
EXTRN START_BDS:NEAR
EXTRN DSK_BUF2:NEAR
EXTRN HDS_OFFSET:NEAR
;--------------------------------------------------------- 88/03/25 --
;---------------------------------------------------------------------
EXTRN CMD_ERR:FAR
;---------------------------------------------------------------------
EXTRN CHR_VOL1:BYTE,SV_SELECT:BYTE
EXTRN SV_RDRV:BYTE,DD_FLG:BYTE
EXTRN X2_SW_00:BYTE,X2_SW_01:BYTE ;850505
EXTRN INIT_TBL:NEAR
;----------------------------------------------- DOS5 91/01/10 -------
EXTRN MYATN:WORD, MYFAT:BYTE, FIRST:BYTE, VOLWORK:BYTE
EXTRN RETCODE:BYTE, NO_NAME:BYTE, MOSW:BYTE
EXTRN SNGDRV1_MSG:BYTE, SNGDRV2_MSG:BYTE, SNGDRV_CMN:BYTE
EXTRN SNG_MSG1:BYTE
EXTRN MASKB:BYTE, F_SW:BYTE, DB_TRNS:WORD
EXTRN NBYTETBL:BYTE, NBYTETBL5:BYTE
EXTRN CURSEC:BYTE, CURHD:BYTE, CURTRK:WORD, HDNUM:BYTE
EXTRN PATCH0:WORD, PATCH1:WORD, PATCH3:WORD
EXTRN TrackTable:BYTE, sectorsPerTrack:WORD, mediaType:BYTE
EXTRN fSetOwner:BYTE, PART_NUM:BYTE
;---------------------------------------------------------------------
EXTRN START_SEC_H:WORD
EXTRN BPBCOPY:BYTE
EXTRN MOSW2:BYTE, SCSI_EQUIP:BYTE
Bios_Data ends
Bios_Code segment word public 'Bios_Code'
ASSUME CS:BIOS_CODE,DS:DATAGRP
EXTRN STOP_CHK:NEAR
EXTRN FLUSH:NEAR,KBSTAT:NEAR,KBIN:NEAR,MSGLOOP:NEAR,MSGL:NEAR
IF BRANCH ;----------------------------------------------- 90/03/16 --
EXTRN MEDIA_VIRTUAL:NEAR
EXTRN GET_VTBPB:NEAR
ENDIF ;---------------------------------------------------------------
EXTRN MEDIA_HD:NEAR
; EXTRN MEDIA_5HD:NEAR
; EXTRN MEDIA_SHD:NEAR
EXTRN GET_HD:NEAR
; EXTRN GET_5HD:NEAR
; EXTRN GET_SHD:NEAR
EXTRN CMN_RW_HD:NEAR
; EXTRN CMN_RW_SASI:NEAR
; EXTRN CMN_RW_SCSI:NEAR
EXTRN MEDIA_MO:NEAR
EXTRN OPEN_MO:NEAR
EXTRN CLOSE_MO:NEAR
EXTRN GET_MO:NEAR
EXTRN CMN_RW_MO:NEAR
EXTRN BDATA_SEG:WORD
Bios_Code ends
INTVEC SEGMENT AT 0000H
ORG 500H
BIO_FLAG LABEL BYTE
BIO_FLAG1 LABEL BYTE
ORG 564H
DISK_RESULT LABEL BYTE
ORG 5D8H
F2DD_RESULT LABEL BYTE
INTVEC ENDS
Bios_Code segment word public 'Bios_Code'
ASSUME CS:BIOS_CODE,DS:DATAGRP
PUBLIC DSKIO_CODE_START
PUBLIC DSKIO_CODE_END
PUBLIC DSKIO_END
PUBLIC DSK_INIT_CODE,MEDIA_CHK_CODE,GET_BPB_CODE
PUBLIC DSK_READ_CODE,DSK_WRIT_CODE,DSK_WRTV_CODE
IF BRANCH ;----------------------------------------------- 90/03/16 --
PUBLIC HARDBPB,SET_VBPB
ENDIF ;---------------------------------------------------------------
;
; DOS 3.XX
;
PUBLIC DSK_OPEN_CODE,DSK_CLOSE_CODE,DSK_REMOVABLE_CODE
;--------------------------------------------------------- 88/03/25 --
;----------------------------------------------- DOS5 91/01/10 -------
; PUBLIC DB_TRNS
;---------------------------------------------------------------------
PUBLIC Generic$IOCTL_CODE
PUBLIC IOCTL$GetOwn_CODE
PUBLIC IOCTL$SetOwn_CODE
;---------------------------------------------------------------------
;----------------------------------------------- DOS5 91/01/10 -------
; PUBLIC MOSW
;---------------------------------------------------------------------
DSKIO_CODE_START:
IODAT STRUC
CMDLEN DB ?
UNIT DB ?
CMD DB ?
STATUS DW ?
DB 8 DUP(?)
MEDIA DB ?
TRANS DD ?
COUNT DW ?
START DW ?
IODAT ENDS
;
; DEFINE EQU LABEL
;
BPB_BPS EQU 0 ;BYTE PER SECTOR
BPB_SPA EQU 2 ;NUMBER OF SECTORS PER ALLOC UNIT
BPB_RSVN EQU 3 ;NUMBER OF RESERVED SECTOR
BPB_FATN EQU 5 ;NUMBER OF COPY OF FAT
BPB_DRMX EQU 6 ;NUMBER OF DIRECTORY ENTRY
BPB_SPV EQU 8 ;NUMBER OF SECTOR PER VOLUME
BPB_MDA EQU 10 ;MEDIA DISCRIPTOR
BPB_FATS EQU 11 ;NUMBER OF OCCUPIED SECTOR BY FAT
;----------------------------------------------- DOS5 91/01/10 -------
;********************************************************
;*
;* DEFINE LOCAL DATA
;*
;********************************************************
;CARRY DB 0 ;10-25-85
;MYATN DW ?
;MYFAT DB ?
;FIRST DB 0
;VOLWORK DB 11 DUP (20H)
; DB 00
;
;RETCODE DB 0
;ERROR_FLG DB 0
;NO_NAME DB 'NO NAME ',00H
;MOSW DB 0
;
;
; MESSAGE DATA
;
;SNGDRV1_MSG DB 13,10,'<27>h<EFBFBD><68><EFBFBD>C<EFBFBD>u<EFBFBD>@'
;SNGDRV1_FLD DB 'A<>@<40>Ƀf<C983>B<EFBFBD>X<EFBFBD>N<EFBFBD><4E><EFBFBD>}<7D><><EFBFBD><EFBFBD><EFBFBD>ĉ<EFBFBD><C489><EFBFBD><EFBFBD><EFBFBD>',0
;SNGDRV2_MSG DB 13,10,'<27>h<EFBFBD><68><EFBFBD>C<EFBFBD>u<EFBFBD>@'
;SNGDRV2_FR DB 'B<>@<40>ɑ}<7D><><EFBFBD><EFBFBD><EFBFBD>悤<EFBFBD>Ƃ<EFBFBD><C682><EFBFBD><EFBFBD>f<EFBFBD>B<EFBFBD>X<EFBFBD>N<EFBFBD><4E><EFBFBD>h<EFBFBD><68><EFBFBD>C<EFBFBD>u<EFBFBD>@'
;SNGDRV2_LT DB 'A <20>ɑ}<7D><><EFBFBD><EFBFBD><EFBFBD>ĉ<EFBFBD><C489><EFBFBD><EFBFBD><EFBFBD>',0
;SNGDRV_CMN DB 13,10,'<27>}<7D><><EFBFBD><EFBFBD><EFBFBD>I<EFBFBD><49><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>A<EFBFBD>K<EFBFBD><4B><EFBFBD>ȃL<C883>\<5C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĉ<EFBFBD><C489><EFBFBD><EFBFBD><EFBFBD>'
;SNG_MSG1 DB 0
;
;--------------------------------------------- 011 PRODUCT ------
;MASKB DB 1,2,4,8
;F_SW DB 0
;DB_TRNS DW 0
;NBYTETBL DB 0,3,0,2,0,0,0,0,0 ;1MB FD DENSITY 871003
;NBYTETBL5 DB 0,0,0,0,0,0,3,2,0 ;640KFD DENSITY 871003
;------------------------------------------------------ BY MAMA -
PAGE
;********************************************************
;* *
;* < DSK_INIT > *
;* *
;* INITIALIZE DISK DRIVE *
;* *
;* INPUT: NONE *
;* OUTPUT: NUMBER OF UNIT *
;* INITIAL BPB POINTER *
;* *
;********************************************************
DSK_INIT_CODE PROC FAR
DSK_INIT_CODE ENDP
DSK_INIT_DONE:
;----------------------------------------------- DOS5A 92/12/01 ------
;<patch BIOS50-P31>
extrn patch144_9:near
call patch144_9
;---------------
; MOV AL,DRV_NUM ;GET NUMBER OF UNITS IN SYSTEM
;---------------------------------------------------------------------
MOV SI,OFFSET INIT_TBL ;SET OFFSET TO BPB POINTER
LDS BX,[PTRSAV] ;LOAD DWORD POINTER
MOV [BX.MEDIA],AL ;SET NUMBER OF UNITS IN SYSTEM
MOV [BX.COUNT],SI ;SET OFFSET
MOV [BX.COUNT+2],0060h ;SET SEGMENT
MOV BYTE PTR [BX.COUNT+3],0 ;SET START DRIVE IN DRIVER
JMP EXIT
;********************************************************
;* *
;* < MEDIA_CHK > FUNCTION 1 *
;* *
;* WHICH MEDIA WAS EXCHANGED OR NOT ? *
;* *
;* INPUT: UNIT NUMBER *
;* OUTPUT: RETUEN BYTE *
;* 1:UNKOWN 0:NOT CHANGED -1:CHANGED *
;* *
;********************************************************
MEDIA_CHK_CODE PROC FAR
MEDIA_CHK_CODE ENDP
CALL CNVDRV ;CONVERT LOGICAL TO DA/UA
IF BRANCH ;----------------------------------------------- 90/03/16 --
TEST CURUA,08H ;VIRTUAL DISK ?
JZ MEDIA010
JMP MEDIA_VIRTUAL ;SKIP IF SO
ENDIF ;---------------------------------------------------------------
;------------------------------------------- FOR N-MODE 640KBFD 870906 ---
; CMP AL,90H ;CURRENT 8"FD ?
; JE MEDIA_8FD ;SKIP IF SO
;-------------------------------------------------------------------------
MEDIA010:
CMP AL,80H ;CURRENT SASI HD ?
JNZ MEDIA020
JMP MEDIA_HD ;SKIP IF SO
; JMP MEDIA_5HD ;SKIP IF SO
;--------------------------------------------------------- 88/03/25 --
MEDIA020:
CMP AL,0A0H ;CURRENT SCSI HD OR MODISK?
JNZ MEDIA030
;--------------------------------------------------------- 89/08/18 --
CMP [MOSW],00H ;MO DISK ?
JNZ MEDIA025
JMP MEDIA_HD ;SCSI HD
; JMP MEDIA_SHD ;SCSI HD
MEDIA025:
JMP MEDIA_MO ;MO DISK
;---------------------------------------------------------------------
MEDIA030:
;---------------------------------------------------------------------
CMP AL,70H ;CURRENT 5"FD(2DD) ?
JE MEDIA_5FD ;SKIP IF SO
;------------------------------------------- FOR N-MODE 640KB 870906 -----
CMP AL,90H ;CURRENT 8"FD ?
JNE MEDIA_UNKNOWN ;NO,
JMP MEDIA_8FD ;SKIP IF SO
MEDIA_UNKNOWN:
;-------------------------------------------------------------------------
;
; UNKNOWN UNIT ERROR
;
MOV AX,1 ;SET ERROR CODE
JMP DSK_ERR_EXIT
IF HDSASI ;---------------------------------------------- 88/02/25 --
;****************************************
;* *
;* HERE, UNIT VIRTUAL *
;* *
;****************************************
MEDIA_VIRTUAL:
;IF BRANCH ;-------------------------------------------- 871002 -------
MOV AL,VDSK_AI ;GET CONTROL INFORMATION
MOV CL,CURUA ;GET UNIT ADDRESS
AND CL,07H
MOV AH,01H
SHL AH,CL
TEST AL,AH ;CURRENT READY ?
JNE MEDIA_VT10
; NOT READY !!
MOV AX,2
JMP DSK_ERR_EXIT ;NOT CHANGED
MEDIA_VT10:
MOV AH,10H
SHL AH,CL ;MAKE ATTENTION BIT
TEST AL,AH ;ATTENTION HAPPENED ?
JNE MEDIA_VT20
; NOT ATTENTION !!
;ENDIF ;-------------------------------------------------------------
MOV AH,1 ;850507 (AX -> AH) "NOT CHANGED"
JMP DSKCHG_OK
;
; READY AND ATTENTION !!
;
;IF BRANCH ;-------------------------------------- 871002 -------
MEDIA_VT20:
CALL MV_GET_TYP ;850510 GET VOLUME TYPE **
CMP AL,5 ;HARD DISK
JB MEDIA_VT30
;
;-----LOAD CURRENT HARD BPB IMAGE
;
CALL HARDBPB
JC MEDIA_VT40
MEDIA_VT30:
MOV AH,-1 ;850506 SET CHANGED CODE
JMP DSKCHG_OK
MEDIA_VT40:
MOV AX,2
JMP DSK_ERR_EXIT
MV_GET_TYP: MOV SI,OFFSET VDSK_TYP ;SET VIRTUAL DISK TYPE OFFSET
MOV AL,[CURUA] ;
AND AX,0007H ;
ADD SI,AX ;
CLD ;
LODSB ;
RET ;
;ENDIF ;-------------------------------------------------------------
;****************************************
;* *
;* HERE, UNIT IS SASI HD *
;* *
;****************************************
MEDIA_5HD:
MOV AH,01H ;SET RETURN BYTE, NOT CHANGED
JMP DSKCHG_OK
ENDIF ;---------------------------------------------------------------
IF HDSCSI ;----------------------------------------------- 88/03/25 --
;****************************************
;* *
;* HERE, UNIT IS SCSI HD *
;* *
;****************************************
MEDIA_SHD:
MOV AH,01H ;SET RETURN BYTE, NOT CHANGED
JMP DSKCHG_OK
ENDIF ;---------------------------------------------------------------
;****************************************
;* *
;* HERE, UNIT IS 5"FD *
;* *
;****************************************
;
MEDIA_5FD:
;--------------------------------------------- FOR N-MODE 640KBFD 870906 ---
TEST [SYS_501],00001000B ;HIRESO MODE ?
JZ MED5_NORM ;NO,
MOV AH,00H ;YES, SET RETURN BYTE, DON'T KNOW
JMP DSKCHG_OK
MED5_NORM:
CALL EXCMSG ;PROMOTE EXCHANGE MEDIA
MOV [BIOS_FLAG],1 ;INDICATE DURING DISK I/O
PUSH ES
XOR AX,AX
MOV ES,AX ;CLEAR ES
MOV AL,[CURUA] ;GET CURRENT UNIT ADDR
XOR AH,AH
MOV [PUA],AL
SHL AX,1
ADD AX,OFFSET F2DD_RESULT ;ADDING OFFSET
MOV BX,AX
MOV AL,ES:[BX] ;GET AI-RESULT
AND AL,0C0H
MOV [RETCODE],AL ;SAVE IT
MOV AL,[PUA]
OR AL,70H
MOV [PWINF],AL
;
MOV BL,[PUA]
XOR BH,BH
TEST SNRST1[BX],02H
JNE AIPRC ;SKIP IF NO ATTENTION !!
MOV AL,RETCODE
CMP AL,0C0H ;AI OCCURRED ?
JE AIPRC ;SKIP IF SO
MOV AH,1 ;NOT CHANGED !!
POP ES
JMP DSKCHG_OK
;
AIPRC:
MOV AL,PUA
MOV BX,OFFSET MASKB
XLAT [BX]
MOV AH,ES:[055DH]
POP ES
MOV CL,4
SHR AH,CL
AND AH,AL ;DA/UA=0FXH ?
MOV AL,PUA
JNE AIPRC10 ;SKIP IF NO
OR AL,0F0H
MOV PWINF,AL ;DA/UA O.K.
JMP AIPRC60
;
AIPRC10:
MOV AL,PWINF
AIPRC30:
MOV BL,PUA
XOR BH,BH
TEST SNRST1[BX],08H ;BI-DRIVE UNIT ?
JE AIPRC40 ;SKIP IF NO
JMP AIPRC50 ;SKIP IF SO
;
AIPRC40:
;
; HANDLE 640 KB MEDIA ON 640 KB INTERFACE
;
MOV PWINF,AL
PUSH ES
PUSH AX
XOR BX,BX
MOV ES,BX
AND AX,000FH
SHL AX,1
ADD AX,OFFSET F2DD_RESULT
MOV BX,AX
AND ES:BYTE PTR [BX],3FH
POP AX
;
MOV ES,CS:[BDATA_SEG] ;ES <- Data segment @DOS5
MOV BP,OFFSET DSK_BUF ;SET I/O BUFFER
MOV CX,0200H ;SET SECTOR LENGTH & CYLINDER #
MOV DX,0002H ;SET HEAD # & SECTOR #
MOV BX,512 ;SET TRANSFER LENGTH
NXT_FAT_READ:
FAT_RD_OK:
POP ES ;RESTORE ES
XOR AH,AH
MOV BX,OFFSET PREDENS5
MOV DI,OFFSET BIDTBL5
TEST PWINF,20H ;1 MB INTERFACE ?
JNE FAT_RD_OK01 ;SKIP IF NO
MOV BX,OFFSET PREDNST
MOV DI,OFFSET BIDTBL
FAT_RD_OK01:
MOV AL,[CURUA]
ADD BX,AX ;MAKE PROPER ADDER
ADD DI,AX ;SAME DO
MOV AL,PWINF
MOV BYTE PTR [DI],AL
;---------------------------------------
MOV DL,[BX] ;GET PREVIOUS TYPE
MOV CL,DS:[BP] ;GET FAT ID
MOV AL,0
CMP CL,0FEH ;5"1D8 ?
JE J_5FDCHG
INC AL
CMP CL,0FCH ;5"1D9 ?
JE J_5FDCHG
INC AL
CMP CL,0FFH ;5"2D8 ?
JE J_5FDCHG
INC AL
CMP CL,0FDH ;5"2D9 ?
JE J_5FDCHG
INC AL
CMP CL,0FBH ;5"2DD8 ?
JE J_5FDCHG
INC AL
CMP CL,0F9H ;5"2DD9 ?
JE J_5FDCHG
UNKNOWN_DSK:
;------------------------------------------------- PATCH FIX PC-2111 -
MOV AL,[PWINF] ;SET DA/UA
CALL ERR_SUB ;SET AI FLAG
;---------------------------------------------------------------------
MOV AL,7 ;SET ERROR CODE - UNKNOWN DISK
JMP DSK_ERR_EXIT
J_5FDCHG:
MOV AH,0 ;UNKNOWN DISK CHANGED
TEST PWINF,20H
JNE J_5FDCHG10
ADD AL,4 ;85/03/21
J_5FDCHG10:
CMP AL,DL ;SAME TYPE ?
JE D_CHG_RET
NOT AH ;DISK CHANGED
MOV [BX],AL ;SET CURRENT TYPE
TEST PWINF,20H
JE NEW_SETMOD ;85/04/11
CALL S_2DDM ;85/05/17
D_CHG_RET:
JMP DSKCHG_OK
NEW_SETMOD:
PUSH AX
CMP AL,3
JBE NOT_NEWSET ;SKIP IF 1MB
MOV SAVEAL,AL
NEW_SETEXEC:
MOV BX,OFFSET MASKB
MOV AL,PUA
XLAT [BX] ;GET MASK BIT
MOV AH,OPMOD ;GET OPERATION MODE
CMP SAVEAL,8
JAE SET_DDMOD
NOT AL
AND AH,AL
JMP SHORT SET_COMMOD
SET_DDMOD:
OR AH,AL ;85/05/17
SET_COMMOD: ;85/05/17
MOV OPMOD,AH ;85/05/17
MOV AL,AH ;85/05/19
AND AL,0FH ;85/05/17
OR AL,10H ;85/05/17
MOV AH,8EH
NOT_NEWSET:
POP AX
JMP SHORT D_CHG_RET
;
; 7XH AND FXH MAY BE APPEARED !!
;
AIPRC50:
MOV AL,[CURUA]
MOV BX,OFFSET MASKB
XLAT [BX]
MOV BX,OFFSET BIDTBL5
TEST FSW5,AL
JNE AIPRC55 ;NOT FIRST
OR FSW5,AL
MOV AL,[CURDA]
OR AL,PUA
JMP SHORT AIPRC60
AIPRC55:
MOV AL,[CURUA]
XLAT [BX]
AIPRC60:
AIPRC100:
TEST AL,80H ;1 MB ?
JNE AIPRC110 ;SKIP IF SO
JMP AIPRC40 ;640 KB
;
; HANDLE 1 MB MEDIA ON 640 KB INTERFACE
;
AIPRC110:
MOV CL,6
CMP CH,3 ;1024
JE AIPRC120 ;SKIP IF SO
MOV CL,7 ;PC-AT
CMP CH,2
JE AIPRC120 ;SKIP IF SO
JMP UNKNOWN_DSK
;
AIPRC120:
MOV CH,AL ;SAVE DA
MOV PWINF,AL
MOV SI,OFFSET BIDTBL5
MOV DI,OFFSET PREDENS5
MOV AL,[CURUA]
XOR AH,AH
ADD SI,AX
ADD DI,AX
MOV BYTE PTR [SI],CH ;SAVE DA/UA
MOV AH,0 ;UNKNOWN CHANGED !!
CMP BYTE PTR [DI],CL
JE AIPRC130 ;SKIP IF ??
NOT AH ;CHANGED !!
MOV BYTE PTR [DI],CL
AIPRC130:
JMP D_CHG_RET
;****************************************
;* *
;* SET 5"2DD OPERATION MODE *
;* HIRESO MODE ONLY *
;* *
;****************************************
S_2DDM:
RET
;---------------------------------------------------------------- 870906 ---
;****************************************
;* *
;* 1 MB INTERFACE *
;* *
;****************************************
MEDIA_8FD:
SENS_DSK8:
CALL EXCMSG ;PROMOTE EXCHANGE MEDIA
MOV [BIOS_FLAG],1 ;INDICATE DURING DISK I/O
XOR AX,AX
MOV AL,[CURUA]
MOV PUA,AL
MOV CL,3
SHL AX,CL ;*8
MOV DI,OFFSET DISK_RESULT ;SET TOP OF DISK RESULT(0:)
ADD DI,AX ;SET TARGET DISK RESULT
MOV CL,[CURUA]
MOV AL,01H
SHL AL,CL
MOV S_R8,AL ;SAVE AL
PUSH ES
TEST AL,F_SW ;FIRST ACTIVATE ?
JZ SENS_EXE ;JUMP IF SO
;----------------------------------------------- DOS5 92/06/22 -------
;<patch BIOS50-P22>
extrn patch06a:near
call patch06a
db 90h,90h
;---------------
; CMP SNGDRV_FLG,0
;---------------------------------------------------------------------
JNE SENS_EXE
XOR BX,BX
MOV ES,BX ;ES <-- 0000H
MOV AL,ES:[DI] ;GET AI INF.
AND AL,0C0H
MOV RETCODE,AL
CMP AL,0C0H ;AI ?
JE SENS_EXE ;YES
MOV AH,1 ;DISK NOT CHANGED
POP ES
JMP D_CHG_RET
;
SENS_EXE:
BI_GOOD:
MOV PWINF,AL
MOV BL,S_R8
OR F_SW,BL
TEST AL,80H ;640 MB ?
JE MB_640 ;SKIP IF SO
;
; HANDLE 1 MB MEDIA ON 1 MB INTERFACE
;
;----------------------------------- 870913 ----- MAMA ---------------
MOV AL,0 ;85/5/12
OR CH,CH
JE SKIP_128 ;128B/SEC
MOV AL,3 ;512B/SEC
SUB CH,2
JE SKP_RFAT8
MOV AL,1 ;1024/SEC
; JMP SKP_RFAT8
;---------------------------------------------------------------------
SKIP_128:
SKP_RFAT8:
XOR CH,CH
MOV CL,[CURUA] ;CURRENT UA
MOV SI,CX
MOV DI,CX
ADD SI,OFFSET PREDNST
ADD DI,OFFSET BIDTBL
MOV AH,0 ;UNKNOWN DISK CHANGED
MOV BL,PWINF
MOV BYTE PTR [DI],BL ;UPDATE IT
CMP AL,[SI] ;COMPARE PREVIOUS DENSITY
JE SKP_SCUR8
MOV [SI],AL ;SET CURRENT TYPE
NOT AH ;DISK CHANGED
SKP_SCUR8:
JMP D_CHG_RET
;
; HANDLE 640 KB MEDIA ON 1 MB INTERFACE
;
MB_640:
;------------------------------------------------ PATCH FIX 88/02/25 -
TEST BYTE PTR [SYS_501],08
JNZ SKIP_128
;---------------------------------------------------------------------
JMP AIPRC40
;----------------------------------------------------------------
;****************************************
;* *
;* END OF MEDIA CHECK *
;* *
;****************************************
DSKCHG_OK:
CMP AH,1 ;MEDIA CHANGED ?
JZ DSKCHG_OK10 ; CHANGED/DON'T KNOW
PUSH AX
CALL SET_IDPTR ;SET VOLUME ID POINTER
POP AX
JMP SHORT DSKCHG_OK20
DSKCHG_OK10:
LDS BX,[PTRSAV]
DSKCHG_OK20:
MOV BYTE PTR [BX.TRANS],AH ;SET RETURN BYTE
JMP EXIT
;****************************************
;* *
;* SET VOLUME ID *
;* (DOS 3.XX ENHANCEMENT) *
;* *
;****************************************
SET_IDPTR:
;--------------------------------------------------------- 88/05/28 --
; MOV AL,CURDRV ;GET CURRENT DRIVE NUMBER
; MOV AH,12
; MUL AH ;CAL 12*CURDRV
; MOV DI,OFFSET VOLTABLE
; ADD DI,AX
;---------------------------------------------------------------------
MOV AL,CURDRV
CALL SetDrive
LEA DI,[DI].BDS_VOLID
LDS BX,[PTRSAV]
MOV WORD PTR [BX.TRANS+1],DI ;SET OFFSET
MOV AX,CS:[BDATA_SEG]
MOV WORD PTR [BX.TRANS+3],AX ;SET SEGMENT
; MOV WORD PTR [BX.TRANS+3],CS ;SET SEGMENT
RET
;********************************************************
;* *
;* DEVICE OPEN FUNCTION *
;* *
;********************************************************
DSK_OPEN_CODE PROC FAR
DSK_OPEN_CODE ENDP
;--------------------------------------------------------- 88/05/28 --
; MOV BX,OFFSET REFCNT ;SET REFER COUNTER TABLE ADDR
; XOR AH,AH
; ADD BX,AX
; INC BYTE PTR [BX] ;1 INCREMENT ,EVRY OPEN
;---------------------------------------------------------------------
;--------------------------------------------------------- 89/08/18 --
CALL CNVDRV
MOV AL,CURDRV
;---------------------------------------------------------------------
CALL SetDrive
INC [DI].BDS_OPCNT
;--------------------------------------------------------- 89/08/18 --
CMP [MOSW],00H
JZ DSKOPEN010
JMP OPEN_MO
DSKOPEN010:
;---------------------------------------------------------------------
JMP EXIT
;********************************************************
;* *
;* DEVICE CLOSE FUNCTION *
;* *
;********************************************************
DSK_CLOSE_CODE PROC FAR
DSK_CLOSE_CODE ENDP
;--------------------------------------------------------- 88/05/28 --
; MOV BX,OFFSET REFCNT ;SET REFER COUNTER TABLE ADDR
; XOR AH,AH
; ADD BX,AX
; cmp byte ptr [bx],0
; jbe dsk_close10
; DEC BYTE PTR [BX] ;1 DECREMENT, EVRY CLOSE
;---------------------------------------------------------------------
;--------------------------------------------------------- 89/08/18 --
CALL CNVDRV
MOV AL,CURDRV
;---------------------------------------------------------------------
CALL SetDrive
CMP [DI].BDS_OPCNT,0
JBE DSK_CLOSE10
DEC [DI].BDS_OPCNT
;--------------------------------------------------------- 89/08/18 --
CMP [MOSW],00H
JZ dsk_close10
JMP CLOSE_MO
;---------------------------------------------------------------------
dsk_close10:
JMP EXIT
;********************************************************
;* *
;* REMOVABLE DISK FUNCTION *
;* *
;********************************************************
DSK_REMOVABLE_CODE PROC FAR
DSK_REMOVABLE_CODE ENDP
MOV BX,OFFSET EXLPTBL+1
;----------------------------------------------- DOS5 91/04/01 -------
;PATCH FIX
XOR AH,AH
SHL AL,1
ADD BX,AX
MOV AL,BYTE PTR [BX] ;CURRENT DA/UA
;---------------------
; SHL AL,1
; XLAT BYTE PTR [BX] ;GET CURRENT DA/UA
;---------------------------------------------------------------------
AND AL,0F0H ;STRRIP LOW
;--------------------------------------------------------- 88/03/25 --
CMP AL,80H ;SASI HD ?
JE DSK_REME10 ;NON-REMOVABLE
CMP AL,0A0H ;NOT SCSI HD OR MO DISK?
JNE DSK_REMEXIT ;REMOVABZLE
TEST BYTE PTR [BX-1],01H ;MO DISK ?
JZ DSK_REME10 ;SCSI HD
JMP short DSK_REMEXIT ;MO DISK
DSK_REME10:
JMP BUS_EXIT ;NON-REMOVABLE
DSK_REMEXIT:
JMP EXIT ;REMOVABLE
;---------------------------------------------------------------------
;****************************************
;* *
;* CONVERT LOGICAL TO DA/UA *
;* INPUT : UNIT NUMBER IN AL *
;* OUTPUT: DA IN AL *
;* : SET FOLLOWING *
;* (CURDRV/CURDA/CURUA, *
;* EXTSW) *
;* *
;****************************************
CNVDRV:
MOV [CURDRV],AL
MOV BX,OFFSET EXLPTBL ;SET CONVERT TABLE ADDR
MOV CL,AH ;SAVE MEDIA DISCRIPTOR
SHL AL,1 ;AL=AL*2
XOR AH,AH
ADD BX,AX
MOV AX,[BX] ;GET TABLE CONTENTS
MOV [EXTSW],0
TEST AL,80H ;CHECK LOGICAL EXTENT BIT ?
JZ CNVDRV_10 ;SKIP IF OFF
MOV [EXTSW],0FFH ;TURN ON
CNVDRV_10:
;--------------------------------------------------------- 89/08/18 --
MOV [MOSW],0
TEST AL,01H
JZ CNVDRV_20
MOV [MOSW],0FFH
;----------------------------------------------- DOS5 91/08/00 -------
mov [mosw2],0
mov bl,ah
and bl,0fh
xor bh,bh
cmp byte ptr SCSI_EQUIP.[bx],07h ;if 3.5" MO
jne CNVDRV_20
mov [mosw2],0ffh
;---------------------------------------------------------------------
CNVDRV_20:
;---------------------------------------------------------------------
XCHG AH,AL
MOV [CURUA],AL
AND [CURUA],0FH
AND AL,0F0H
MOV [CURDA],AL
MOV AH,CL ;RESTORE MEDIA DISCRIPTOR
RET
;****************************************
; *
; POINT CURRENT AI FIELD *
; INPUT : NOTHING *
; OUTPUT : CURRENT AI ADDR IN DI *
; *
;****************************************
AIPOINT:
XOR AX,AX ;MAKE ABSOLUTE ZERO
MOV ES,AX
MOV AL,CURUA
SHL AL,1
SHL AL,1
SHL AL,1 ;AL=AL*8 (85/03/01)
MOV DI,OFFSET DISK_RESULT ;SET BASE ADDR
ADD DI,AX
RET
;****************************************
;* *
;* IF CURRENT IS SINGLE SYSTEM, *
;* DISPLAY MEDIA EXCHANGING *
;* MESSAGE *
;* *
;****************************************
EXCMSG:
PUSH ES
PUSH BP
PUSH DX
PUSH CX
CMP EXTSW,0 ;SINGLE DRIVE ?
JE SKP_KBIN ;SKIP IF NOT
MOV AL,CURDRV ;SET CURRENT DRIVE
;----------------------------------------------- DOS5 92/06/22 -------
;<patch BIOS50-P22>
extrn patch06c:near
call patch06c
db 90h
;---------------
; CMP AL,PRVDRV ;CURRNT = PREVIOUS ?
;---------------------------------------------------------------------
JE SKP_KBIN ;SKIP IF SO
MOV BX,OFFSET SNGDRV1_MSG
CMP AL,PRVDRV
JBE EXCMSG_30
EXCMSG_20:
MOV BX,OFFSET SNGDRV2_MSG
EXCMSG_30:
MOV PRVDRV,AL ;UPDATE IT
CALL MSGL ;PUT STRING
MOV BX,OFFSET SNGDRV_CMN
CALL MSGL
L_KBIN:
CALL KBSTAT ;WAIT KEY INPUT
JZ L_KBIN
CMP AL,'C'-'@' ;CTRL-C ?
JE SKP_KBIN
CALL KBIN
MOV BX,OFFSET SNG_MSG1
CALL MSGLOOP
SKP_KBIN:
POP CX
POP DX
POP BP
POP ES
RET
dosetsub: ;
SET_BPB:
CMP CURDA,90H
JNE SET_BPB20
SET_BPB10:
TEST FIRST,-1
MOV FIRST,-1
JE SET_BPB20 ;
;--------------------------------------------------------- 88/05/28 --
; MOV BX,OFFSET REFCNT ;
; PUSH AX
; MOV AL,CURDRV ;
; XLAT [BX] ;
; OR AL,AL ;
; POP AX
;---------------------------------------------------------------------
PUSH AX
MOV AL,CURDRV
CALL SetDrive
CMP [DI].BDS_OPCNT,0
POP AX
;---------------------------------------------------------------------
JNE SET_BPB20 ;
;----------------------------------------------- DOS5 91/02/20 -------
PUSH AX
PUSH SI
MOV AL,CURDRV
MOV RW_SW,0
CALL BOOTIO
JC SET_BPB15
CALL MOV_MEDIA_IDS
JNC SET_BPB15
MOV WORD PTR [DI].BDS_VOL_SERIAL,0
MOV WORD PTR [DI].BDS_VOL_SERIAL+2,0
POP SI
POP AX
;---------------------------------------------------------------------
PUSH AX
PUSH SI
CALL READLABEL ;DOS 3.XX ENHANCEMENT
;READ VOLUME LABEL
POP SI
POP AX
JB SET_BPB20 ;SKIP IF READ ERROR
PUSH AX
PUSH SI
CALL SETLABEL ;SET LABEL POINTER
;----------------------------------------------- DOS5 91/02/20 -------
SET_BPB15:
;---------------------------------------------------------------------
POP SI
POP AX
;
SET_BPB20:
LDS BX,[PTRSAV]
MOV [BX.MEDIA],AL
MOV [BX.COUNT],SI
MOV CX,CS:[BDATA_SEG]
MOV [BX.COUNT+2],CX
ret ;
;
; READ VOLUME LABEL
;
; AL : CURRENT DRIVE NUMBER (0-25)
; AH : MEDIA DISCRIPTER BYTE
;
READLABEL:
MOV AX,06H[SI] ;GET NUMBER OF MAX
MOV AH,32 ;LENGTH(DIR) IS 12 BYTE
MUL AH ;BYTE/TOTAL(DIR)
XOR DX,DX
MOV BX,00H[SI] ;GET BYTE/SECTOR
MOV BYTPSEC,BX
DIV BX ;GET SECTOR/TOTAL(DIR)
MOV BX,AX
MOV DX,0BH[SI] ;GET SECTOR/FAT
SHL DX,1 ;DX INDICATE NUMBER OF START-SEC
INC DX ;ADDING IPL SECTOR
PUSH DS
POP ES
MOV DI,OFFSET DSK_BUF ;READ BUFFER
mov al,curdrv
mov ah,0ah[si]
MOV CX,1
READLB10:
PUSH AX
PUSH BX
PUSH CX
PUSH DX
PUSH ES
PUSH DI
CALL READ ;USE READ IN IO.SYS
JB READLB_ERROR ;SKIP IF ERROR
CALL IDSEARCH ;SEARCH IN IT
READLB_ERROR:
POP DI
POP ES
POP DX
POP CX
POP BX
POP AX
JNB READLB_FOUND
;--------------------------------------------------------- 88/06/07 --
; DEC BX ;COUNTER DOWN
SUB BX,1
;---------------------------------------------------------------------
JZ READLB_NFOUND ;SKIP IF NOT FOUND
INC DX ;START SEC 1 UP
JMP SHORT READLB10 ;GO NEXT
READLB_NFOUND:
MOV SI,OFFSET NO_NAME
READLB_FOUND:
MOV CX,11
MOV DI,OFFSET VOLWORK
CLD
REP MOVSB
RET
IDSEARCH:
MOV CX,BYTPSEC ;GET BYTE/SEC
IDSEARCH10:
CMP ES:BYTE PTR [DI],00H
JE IDSEARCH30
CMP ES:BYTE PTR [DI],0E5H
JE IDSEARCH20
TEST BYTE PTR ES:[DI+11],08H ;VOL LABEL ?
JZ IDSEARCH20 ;SKIP IF NO
MOV SI,DI
CLC ;RETURN WITH FOUND
RET
IDSEARCH20:
SUB CX,32
JZ IDSEARCH30 ;SKIP IF NO REMAIN
ADD DI,32
JMP SHORT IDSEARCH10
IDSEARCH30:
STC ;RETURN WITH NOT-FOUND
RET
SETLABEL:
MOV SI,OFFSET VOLWORK
;--------------------------------------------------------- 88/05/28 --
; MOV DI,OFFSET VOLTABLE
; MOV AL,CURDRV
; MOV AH,12
; MUL AH
; ADD DI,AX
;---------------------------------------------------------------------
MOV AL,CURDRV
CALL SetDrive
LEA DI,[DI].BDS_VOLID
;---------------------------------------------------------------------
MOV CX,11
PUSH ES
MOV ES,CS:[BDATA_SEG]
CLD
REP MOVSB
POP ES
XOR AL,AL
STOSB
RET
PAGE
;********************************************************
; *
; GET APROPRIATE BPB ADDR *
; INPUT : DRIVE NUMBER *
; : POINT TO BUFFET WHICH READ FAT-ID *
; OUTPUT : POINT TO TRUE BPB *
; *
;********************************************************
GET_BPB_CODE PROC FAR
GET_BPB_CODE ENDP
call pointbpb ;
call dosetsub ;
jmp exit ;
;
;
pointbpb:
CALL CNVDRV ;CONVERT DRIVE NUMBER TO DA/UA
PUSH DS ;SAVE CURRENT DS
LDS BX,[PTRSAV] ;DS:BX <-
LES DI,[BX.TRANS] ;ES:DI <-
MOV AH,ES:[DI] ;GET FAT ID FROM BUFFER
;WE ASSUME IBM FORMATTED MEDIA
POP DS ;RESTORE DS
POINTBPB10:
IF BRANCH ;----------------------------------------------- 90/03/16 --
TEST CURUA,08H ;VIRTUAL DRIVE ?
JZ POINTBPB20
JMP GET_VTBPB ;SKIP IF SO
ENDIF ;---------------------------------------------------------------
POINTBPB20:
CMP AL,90H ;DA = 8"FD ?
JE GET_8FD ;SKIP IF SO
CMP AL,80H ;DA = SASI HD ?
JNZ POINTBPB30
JMP GET_HD ;SKIP IF SO
; JMP GET_5HD ;SKIP IF SO
POINTBPB30:
CMP AL,0A0H ;DA = SCSI HD ?
JNZ POINTBPB40
;--------------------------------------------------------- 89/08/18 --
CMP [MOSW],00H ;MO DISK OR SCSI HD
JNZ POINTBPB35
JMP GET_HD ;SCSI HD
; JMP GET_SHD ;SCSI HD
POINTBPB35:
JMP GET_MO ;MO DISK
;---------------------------------------------------------------------
POINTBPB40:
CMP AL,70H ;DA = 5"FD(2DD) ?
JE GET_5FD ;SKIP IF SO
pop bx ;
MOV AX,1 ;SET ERROR CODE, UNKNOWN UNIT
JMP DSK_ERR_EXIT
IF HDSASI ;----------------------------------------------- 88/03/25 --
GET_VTBPB:
;
; SET APROPRIATE ADDR OF VIRTUAL
;
;IF BRANCH ;------------------------------------ 871002 ---------
CALL SUBVTB
MOV BL,[CURUA] ;850516(I)
AND BL,03H ;850516(I)
MOV CL,BL ;850516(I)
MOV BL,10H ;850516(I)
SHL BL,CL ;850516(I)
XOR [VDSK_AI],BL ;850516(I) STRIP AI FALG
MOV AL,[SI+BPB_MDA] ;850507 GET (NEW)MEDIA DISCRIPTOR
;ENDIF ;-------------------------------------------------------------
ret ;
;
; SET APROPRIATE ADDR OF SASI HD
;
GET_5HD:
CALL CALLOG
XOR AL,AL
ret ;
ENDIF ;---------------------------------------------------------------
IF HDSCSI ;----------------------------------------------- 88/03/25 --
;
; SET APROPRIATE ADDR OF SCSI HD
;
GET_SHD:
CALL CALLOG
XOR AL,AL
ret ;
ENDIF ;---------------------------------------------------------------
;
; SET APROPRIATE ADDR OF 8"FD
;
GET_8FD:
;-------85/03/05---------------
MOV SI,OFFSET BIDTBL
MOV AL,CURUA
PUSH AX
XOR AH,AH
ADD SI,AX
POP AX
;----------------------------------------------- DOS5A 92/12/01 ------
;<patch BIOS50-P30>
extrn patch144_3:near
public GET_8FD05, GET_5FD_UPS
public DSK_ERR_EXIT, GET_SET_EXBPB
jmp patch144_3
db 2 dup (90h)
;---------------
; TEST BYTE PTR [SI],80H
; JE GET_5FD_UPS ;850610
;---------------------------------------------------------------------
;-------85/03/05---------------
;----------------------------------------------------- 870913 MAMA ---
GET_8FD05:
;---------------------------------------------------------------------
CMP AH,-2 ;CHECK FAT-ID
JE GET_8FD10
CMP AH,-7 ;IBM-AT MEDIA
JE GET_8FD10
MOV AL,7
pop bx ;
JMP DSK_ERR_EXIT ;UNKNOWN RETURN
;
GET_8FD10:
MOV SI,OFFSET DSK8_SNG
;----------------------------------------------- DOS5A 92/12/01 ------
;<patch BIOS50-P30>
extrn patch144_7:near
public patch144_7_ret, GET_SET_EXBPB
jmp patch144_7
patch144_7_ret:
;---------------
; MOV BX,OFFSET PREDNST
;---------------------------------------------------------------------
MOV AL,CURUA
XLAT ;GET MEDIA ID
OR AL,AL ; 0 : 256KBFD
JE GET_8FD20 ; 1 : 1MBFD(98-FORM)
SUB AL,2 ; 2 : NONE
MOV SI,OFFSET DSK_AT ; 3 : 1MBFD(AT-FORM)
;---------------------------------------------------- 871004 ---------
JNC GET_8FD20
;---------------------------------------------------------------------
MOV SI,OFFSET DSK8_DBL
GET_8FD20:
;------------------------------------------------DOS5 90/01/19-----------
JMP SHORT GET_SET_EXBPB
;------------------------------------------------------------------------
; MOV AL,0
; clc
; ret ;
;------------------------------------------------------------------------
;
; SET APROPRIATE ADDR OF 5"FD
;
GET_5FD_UPS: ;850610
PUSH AX ;850610
MOV SI,OFFSET PREFAT8 ;850610
JMP SHORT GET_5FD_UPS10 ;850610
GET_5FD:
;----------------------------------------------- 870913 --- MAMA -----
MOV SI,OFFSET BIDTBL5
MOV AL,[CURUA]
PUSH AX
XOR AH,AH
ADD SI,AX
POP AX
TEST BYTE PTR [SI],80H ;1MB MEDIA (ON 640 I/F) ?
JNZ GET_8FD05
;---------------------------------------------------------------------
PUSH AX
MOV SI,OFFSET PREFAT ;850610
GET_5FD_UPS10: ;850610
CALL EXCMOD
POP AX
MOV CX,6 ;SET NUMBER OF MEDIA TYPE
MOV SI,OFFSET DSK5_SNG8-13+BPB_MDA
GET_5FD_10:
ADD SI,13
CMP [SI],AH ;CHECK FAT ID
JE GET_5FD_20
LOOP GET_5FD_10
;
; ERROR, UNKNOWN DISK
;
MOV AL,7 ;SET ERROR CODE
pop bx ;
JMP DSK_ERR_EXIT
GET_5FD_20:
;------------------------------------------------DOS5 90/01/19-----------
; XOR AL,AL
; SUB SI,BPB_MDA
; ret ;
;------------------------------------------------------------------------
SUB SI,BPB_MDA
GET_SET_EXBPB:
PUSH ES
PUSH DI
MOV ES,CS:[BDATA_SEG]
MOV DI,OFFSET BPBCOPY
PUSH DI
MOV CX,13
REP MOVSB
CMP BYTE PTR [SI-3],00H
JNE GET_SET_EXBPB10
MOV AX,26
JMP SHORT GET_SET_EXBPB40
GET_SET_EXBPB10:
CMP BYTE PTR [SI-3],01H
JNE GET_SET_EXBPB20
MOV AX,8
JMP SHORT GET_SET_EXBPB40
GET_SET_EXBPB20:
CMP BYTE PTR [SI-3],02H
JNE GET_SET_EXBPB30
MOV AX,15
JMP SHORT GET_SET_EXBPB40
GET_SET_EXBPB30:
MOV AX,8
TEST BYTE PTR [SI-3],02H
JNZ GET_SET_EXBPB40
MOV AX,9
GET_SET_EXBPB40:
STOSW ;SET SECTORS/TRACK
MOV AX,2
CMP BYTE PTR [SI-3],02H
JE GET_SET_EXBPB50
TEST BYTE PTR [SI-3],01H
JNZ GET_SET_EXBPB50
MOV AX,1
GET_SET_EXBPB50:
STOSW ;SET HEADS/CYLINDER
XOR AX,AX
MOV CX,4
REP STOSW ;SET HIDDEN SECTORS, BIG TOTAL SECTORS
MOV AL,CURDRV
CALL SETDRIVE
LEA DI,[DI].BDS_BPB
MOV SI,OFFSET BPBCOPY
;----------------------------------------------- DOS5A 92/12/01 ------
;<patch BIOS50-P30>
public GET_SET_EXBPB60
GET_SET_EXBPB60:
;---------------------------------------------------------------------
MOV CX,25
REP MOVSB
POP SI ;OFFSET ADDDR OF BPBCOPY
POP DI
POP ES
XOR AL,AL
CLC
RET
;-----------------------------------------------------------------------
;
; AH INCLUDS CURRENT FAT-ID
;
EXCMOD:
;------------------------------------------- 870913 MAMA -------------
TEST [SYS_501],08H ;HW MODE IS HIRESO ?
JZ EXCEXIT ;NO, SKIP THIS OP.
;---------------------------------------------------------------------
;850610
MOV CL,CURUA ;SET CURRENT UA
XOR CH,CH
ADD SI,CX
CMP AH,[SI]
JE EXCEXIT ;SKIP IF CURRENT = PREVIOUS
MOV AL,[SI] ;GET PRE FAT-ID TO AL
MOV [SI],AH ;UPDATE IT
CMP AH,-5 ;CURRENT MEDIA IS 2DD ?
JG EXC_CUR_D ;SKIP IF CURRENT IS 2D, ID
CMP AL,-5 ;PREVIOUS MEDIA IS 1D, 2D ?
JLE EXCEXIT ;SKIP IF PREVIOUS 2DD
;
; HERE..(CURRENT IS 2DD) AND (PREVIOUS IS 1D, 2D)
; ISSUE MODE COMMAND
;
EXECHG:
CALL EXCMSG
CALL SETMOD
EXCEXIT:
RET
EXC_CUR_D:
CMP AL,-5 ;PREVIOUS MEDIA IS 2DD ?
JG EXCEXIT ;SKIP IF PREVIOUS IS 1D, 2D
;
; HERE..(CURRENT IS 1D, 2D) AND (PREVIOUS IS 2DD)
; ISSUE MODE COMMAND
;
JMP EXECHG
;-----------------------------------------------;
; ;
; ISSUE MODE COMMAND ;
; ;
;-----------------------------------------------;
SETMOD:
xor ah,ah
clc
RET
PAGE
;********************************************************
;* *
;* READ *
;* INPUT : UNIT NUMBER IN AL *
;* : MEDIA DISCRIPTER IN AH *
;* OUTPUT: READ SPECIFIED SECTOR *
;* *
;********************************************************
DSK_READ_CODE PROC FAR
DSK_READ_CODE ENDP
;----------------------------------------------- DOS5 91/01/22 -------
PUSH DI
CALL SETDRIVE
TEST WORD PTR [DI].BDS_FLAGS,UNFORMATTED_MEDIA
POP DI
JZ DSK_READ_FORMATTED
MOV AL,7
PUSH CX
STC
JMP SHORT DSK_RW_EXIT
DSK_READ_FORMATTED:
;---------------------------------------------------------------------
MOV BYTE PTR VRFY_FLG,0 ;CLEAR VERIFY FLAG
PUSH CX ;SAVE REQUESTED DATA LENGTH
;----------------------------------------------- DOS5 92/06/22 -------
;<patch BIOS50-P20>
extrn PATCH04:near
public REMCHECK
call patch04
;---------------
; CALL REMCHECK ;
;---------------------------------------------------------------------
JB DSK_RW_EXIT ;
CALL READ ;EXECUTION
DSK_RW_EXIT:
POP DX ;RESTORE DATA LENGTH
JNC DSK_EXIT
SUB DX,CX
LDS BX,[PTRSAV]
MOV [BX.COUNT],DX ;SET TRANSFED DATA LENGTH
CMP AX,000FH
JNZ DSK_ERR_EXIT
MOV [BX.COUNT+4],DI ;850822
;----------------------------------------------- DOS5 90/12/14 -------
PUSH AX
MOV AX,CS:[BDATA_SEG]
MOV [BX.COUNT+6],AX
POP AX
;----------------------------
; MOV [BX.COUNT+6],CS ;850822
;---------------------------------------------------------------------
DSK_ERR_EXIT:
JMP ERR_EXIT
DSK_EXIT:
JMP EXIT
;********************************************************
;* *
;* WRITE *
;* INPUT : UNIT NUMBER IN AL *
;* : MEDIA DISCRIPTER IN AH *
;* OUTPUT: READ SPECIFIED SECTOR *
;* *
;********************************************************
DSK_WRIT_CODE PROC FAR
DSK_WRIT_CODE ENDP
;----------------------------------------------- DOS5 91/01/22 -------
PUSH DI
CALL SETDRIVE
TEST WORD PTR [DI].BDS_FLAGS,UNFORMATTED_MEDIA
POP DI
JZ DSK_WRITE_FORMATTED
MOV AL,7
PUSH CX
STC
JMP DSK_RW_EXIT
DSK_WRITE_FORMATTED:
;---------------------------------------------------------------------
MOV BYTE PTR VRFY_FLG,0 ;CLEAR VERIFY FLAG
PUSH CX ;SAVE REQUESTED DATA LENGTH
;----------------------------------------------- DOS5 92/06/26 -------
;<patch BIOS50-P20>
call patch04
;---------------
; CALL REMCHECK ;
;---------------------------------------------------------------------
JB DSK_RW_EXIT ;
DSK_WRT_EXE:
CALL WRITE ;EXECUTION
JMP DSK_RW_EXIT
;
; WRITE WITH VERIFY
;
DSK_WRTV_CODE PROC FAR
DSK_WRTV_CODE ENDP
MOV BYTE PTR VRFY_FLG,1 ;SET VERIFY FLAG
PUSH CX
JMP DSK_WRT_EXE
PAGE
;****************************************
;* *
;* CHECK REMAIN SECTOR *
;* *
;****************************************
REMCHECK: ;
MOV MYFAT,AH
PUSH AX ;
PUSH CX ;
PUSH DX ;
PUSH DI ;
PUSH ES ;
CALL CNVDRV ;
CMP CURDA,90H ;
;----------------------------------------------- DOS5 90/12/22 -------
;PATCH
JE REM_1020
JMP SHORT REMEXIT
REM_1020:
;------------------
; JNE REMEXIT ;
;---------------------------------------------------------------------
CMP RETCODE,0C0H ;
JE REM_1026 ;
XOR AX,AX ;
MOV ES,AX ;
MOV BX,OFFSET DISK_RESULT ;
XOR AH,AH ;
MOV AL,CURUA ;
MOV CL,3 ;
SHL AL,CL ;
ADD BX,AX ;
MOV AL,ES:[BX] ;
MOV MYATN,BX ;
AND AL,0C0H ;
CMP AL,0C0H ;
JNE REMEXIT ;
;
REM_1026: ;
;--------------------------------------------------------- 88/05/28 --
; MOV BX,OFFSET REFCNT ;
; MOV AL,CURDRV ;
; XLAT [BX] ;
; OR AL,AL ;
;---------------------------------------------------------------------
MOV AL,CURDRV
CALL SetDrive
CMP [DI].BDS_OPCNT,0
JE REMEXIT ;
;
REM_1030: ;
MOV AL,CURDRV ;
MOV AH,MYfat
mov cx,1
mov dx,1
mov di,offset dsk_buf
push ds
pop es
call read
;----------------------------------------------- DOS5 90/12/22 -------
;PATCH
JNB REM_1040
MOV AL,CURDRV
CALL SETDRIVE
LEA SI,[DI.BDS_VOLID]
JMP SHORT REM_ERROR
REM_1040:
;---------------------------------------------------------------------
mov ah,es:[di] ;set fat-id byte
mov al,curda
CALL POINTBPB10 ;
CALL VOLCHECK ;
JNB REMEXIT ;
REM_ERROR:
XOR AX,AX ;
MOV ES,AX ;
MOV BX,MYATN ;
OR ES:BYTE PTR [BX],0C0H ;
POP ES ;
POP DI ;
POP DX ;
POP CX ;
POP AX ;
MOV DI,SI ;
MOV AX,000FH ;
STC ;
RET
;
REMEXIT:
POP ES ;
POP DI ;
POP DX ;
POP CX ;
POP AX ;
MOV RETCODE,00H ;
CLC ;
RET ;
;
VOLCHECK:
CALL READLABEL ;
JB VOLEXIT ;
;--------------------------------------------------------- 88/05/28 --
; MOV AL,CURDRV ;
; MOV AH,12 ;
; MUL AH ;
;---------------------------------------------------------------------
MOV DI,OFFSET VOLWORK ;
;---------------------------------------------------------- 88/05/28 -
; MOV SI,OFFSET VOLTABLE ;
; ADD SI,AX ;
;---------------------------------------------------------------------
PUSH DI
MOV AL,CURDRV
CALL SetDrive
LEA SI,[DI].BDS_VOLID
POP DI
;---------------------------------------------------------------------
MOV CX,11 ;
PUSH ES
MOV ES,CS:[BDATA_SEG]
PUSH SI ;
REPE CMPSB ;
POP SI ;
POP ES
JE VOLEXIT ;
STC ;
VOLEXIT:
RET
PAGE
;****************************************
;* *
;* DISK READ SUBROUTINE *
;* *
;****************************************
READ:
MOV BYTE PTR RW_SW,0 ;SET READ FUNCTION
MOV BYTE PTR COM1,06H ;SET READ COMMAND
JMP short COMMON_PHASE
;****************************************
;* *
;* DISK WRITE SUBROUTINE *
;* *
;****************************************
WRITE:
MOV BYTE PTR RW_SW,1 ;SET WRITE FUNCTION
MOV BYTE PTR COM1,05H ;SET WRITE COMMAND
;****************************************
;* *
;* READ/WRITE COMMON ROUTINE *
;* *
;****************************************
COMMON_PHASE:
MOV BIOS_FLAG,1 ;INDICATE BIO BUSY STATE
MOV BP,DI ;SET DMA ADDRESS
MOV LNG_TRNS,CX ;SAVE TRANSFER LENGTH
MOV CUR_TRNS,0 ;CLEAR TRANSFERED LENGTH
MOV NO_TRNS,0 ;CLEAR NON-TRANSFED LENGTH
CALL CNVDRV ;CONVRTED LOG TO DA/UA
MOV SW_5,0 ;CLEAR 5"FD SWITCH
; MOV SW_HD,0 ;CLEAR 5"HD SWITCH 88/03/25
;----------------------------------------------- DOS5A 92/12/01 ------
;<patch BIOS50-P30>
MOV BL,-16 ;-16 MEANS 'F0'
;---------------
; MOV BL,-7 ;-7 MEANS 'F9'
;---------------------------------------------------------------------
CMP AL,90H
JE CMN_RW ;SKIP IF 8"FD
;--------------------------------------------------------- 88/03/25 --
CMP AL,80H ;SASI HD?
JNZ CMNPHASE10
JMP CMN_RW_HD ;SKIP IF SASI HD
; JMP CMN_RW_SASI ;SKIP IF SASI HD
CMNPHASE10:
CMP AL,0A0H ;SCSI HD OR MO DISK?
JNZ CMNPHASE20
;--------------------------------------------------------- 89/08/18 --
CMP [MOSW],00H
JNZ CMNPHASE15
JMP CMN_RW_HD ;SKIP IF SCSI HD
; JMP CMN_RW_SCSI ;SKIP IF SCSI HD
CMNPHASE15:
JMP CMN_RW_MO ;SKIP IF MO DISK
;---------------------------------------------------------------------
CMNPHASE20:
;---------------------------------------------------------------------
MOV BL,-7 ;-7 MEANS 'F9'
NOT SW_5
CMP AL,70H
JE CMN_RW ;SKIP IF 5"FD
CMP AL,50H ;****
JE CMN_RW ;**** SKIP IF 5"320/160KB
MOV AL,1 ;SET ERROR-UNKNOWN UNIT
ERR_RETG1:
JMP ERR_RET1
;
;
; CHECK MEDIA DISCREIPTER
;
CMN_RW:
CMP AH,BL
JGE CMN_RW_20
MOV AL,7 ;SET ERROR-UNKNOWN DISK
JMP ERR_RETG1
;
CMN_RW_15:
; NOT SW_HD ;SET UP HD ACCESS 88/03/25
CMN_RW_20:
CMP LNG_TRNS,0 ;TRANSFER LENGTH = 0 ?
JE RW_RET ;SKIP IF SO(NOT DONE)
MOV RTRY_CNT,AH ;SAVE IT
CALL CONV_REC
MOV AH,RTRY_CNT ;RESET IT
;--------------------------------------------------------- 88/03/25 --
; CMP BYTE PTR SW_HD,0
; JE FD_RW
; JMP HD_RW ;JMP IF HARD DISK ACCESS
;---------------------------------------------------------------------
;****************************************
;* *
;* FLOPPY DISK READ/WRITE *
;* *
;****************************************
FD_RW:
TEST CURUA,08H ;CHECK BRANCH-SPECIAL
JNZ FD_RW001 ;SKIP IF SO !!
;-----HERE,LOCAL MEDIA ONLY----
TEST AL,80H
JNE FD_RW001 ;SKIP IF 1MB ACESS MODE
CMP AH,-5
JLE FD_RW001
CMP BYTE PTR RW_SW,1
JNE FD_RW001
; WRITE PROTECT ERROR
MOV AL,10
JMP ERR_RETG1
;
FD_RW001:
PUSH AX
MOV AX,S_SEC ;SAVE NUMBER OF SECTORS ON TRACK
INC AX
SUB AL,DL
MOV MAX_TRNS,AX ;SAVE IT
CALL EXCMSG
POP AX
RW_LOOP:
CALL SET_LENGTH
MOV BYTE PTR RTRY_CNT,5 ;SET RETRY TIMES
RW_LOOPE:
CALL S_CMD ;SET BIO PARAMETERS
JC RTRY_RW
CALL VERIFY ;CHECK VERIFY AND EXECUTE
RW_LOOPDB:
CMP LNG_TRNS,0 ;READ/WRITE END ?
JNE RW_CONT ;SKIP IF NOT COMPLETE
RW_RET:
CALL STOP_CHK
XOR CX,CX
RET
RW_CONT:
CALL S_REC1
RW_CONT1:
PUSH AX
MOV AX,S_SEC
MOV MAX_TRNS,AX
POP AX
JMP RW_LOOP
RTRY_RW:
AND AH,0F0H ;MASK HIGH BITS
;
; (NOT READY),(WRITE FAULT) DON'T NEED RECALIBLATE AND RETRY
;
;----------------------------------------- CHECK DB ERROR -----------
CMP AH,20H
JE DB_ERR
;------------------------------------------------------- BY MAMA ----
CMP AH,60H ;NOT READY
JE ERR_G1 ;SKIP IF SO
CMP AH,70H ;WRITE PROTECT
JE ERR_G1 ;SKIP IF SO
DEC BYTE PTR RTRY_CNT
JNZ SKP_RW
ERR_G1:
JMP ERROR
SKP_RW:
CALL RCBL ;RECALIBLATE HERE
JMP RW_LOOPE
;********************************
;* *
;* DMA BOUNDARY *
;* ERROR HANDLE ROUTINE *
;* *
;********************************
DB_ERR:
CALL COMP_DB
OR BX,BX ;TRANSFER BYTE = 0 ?
JZ DB_ERR1 ;JUMP IF SO
MOV BYTE PTR RTRY_CNT,10
R_RW_DB:
CALL S_CMD
JNC SKP_RW1 ;JUMP IF NO ERROR
DEC BYTE PTR RTRY_CNT
JNZ SKP_ERR1
JMP ERROR
SKP_ERR1:
CALL RCBL ;RECABLIRATE
JMP SHORT R_RW_DB
SKP_RW1:
CALL VERIFY
PUSH AX
MOV AX,DB_TRNS
SUB CUR_TRNS,AX
ADD DL,AL ;SET SECTOR #
POP AX
ADD BP,BX
DB_ERR1:
MOV BX,LNG_SEC
CALL DB_ERR_DB ;DB ERROR OPERATION
CALL VERIFY
INC DL
DEC CUR_TRNS
JZ RW_LOOPDB
SKP_RWDB:
ADD BP,BX
PUSH AX
PUSH DX
MOV AX,BX
MUL CUR_TRNS
MOV BX,AX
POP DX
POP AX
MOV BYTE PTR RTRY_CNT,10
R_RW_DB1:
CALL S_CMD
JNC SKP_RW2
DEC BYTE PTR RTRY_CNT
JZ ERROR
CALL RCBL ;RECABLIRATE
JMP SHORT R_RW_DB1
SKP_RW2:
CALL VERIFY
JMP RW_LOOPDB
DB_ERR_DB:
CLD
CMP BYTE PTR RW_SW,0 ;READ ?
JNE DB_W ;JUMP IF NOT
PUSH ES
PUSH BP
PUSH DS
POP ES ;ES <= DS @DOS5
MOV BP,OFFSET DSK_BUF
CALL DB_RW
POP BP
POP ES
JC ERROR1
MOV SI,OFFSET DSK_BUF
MOV DI,BP
PUSH CX
MOV CX,BX ;SET TRANSFER LENGTH
CLD
REP MOVSB
POP CX
RET
DB_W:
PUSH ES
PUSH DS
PUSH AX
MOV AX,DS
PUSH ES
POP DS ;DS <= ES
MOV ES,AX ;ES <= DS
POP AX
MOV SI,BP
MOV DI,OFFSET DSK_BUF
PUSH CX
MOV CX,BX ;SET TRANSFER LENGTH
REP MOVSB
POP CX
POP DS
PUSH BP
MOV BP,OFFSET DSK_BUF
CALL DB_RW
POP BP
POP ES
JC ERROR1
RET
ERROR1:
POP CX ;DUMMY POP
;------------------------------------------------------- BY MAMA ---
;****************************************
;* *
;* MAKE ERROR CODE *
;* WHICH MS-DOS REQUESTS *
;* *
;****************************************
ERROR:
;----------------------------------------------- 871010 --------------
CALL ERR_SUB ;SET AI FLAG
;---------------------------------------------------------------------
AND AH,0F0H ;MASK HIGH BITS
XOR AL,AL ;CLEAR AL
CMP AH,70H ;NOT WRITABLE ?
JE ERR_RET ;SKIP IF SO
INC AL ;AL=1
CMP AH,60H ;NOT READY ?
JE ERR_RET ;SKIP IF SO
INC AL ;AL=2
CMP AH,0A0H ;DATA ERROR ?
JE ERR_RET ;SKIP IF SO
CMP AH,0B0H ;DATA ERROR ?
JE ERR_RET ;SKIP IF SO
INC AL ;AL=3
CMP AH,0C0H ;SEEK ERROR ?
JE ERR_RET ;SKIP IF SO
INC AL ;AL=4
CMP AH,0D0H ;SECTOR NOT FOUND ?
JAE ERR_RET ;SKIP IF SO
INC AL ;AL=5
CMP RW_SW,0 ;READ ?
JE SKP_WRT_FLT ;SKIP IF SO
CMP AH,40H ;WRITE FAULT ?
JE ERR_RET ;SKIP IF SO
SKP_WRT_FLT:
INC AL ;AL=6
ERR_RET:
SHL AL,1 ;SET ERROR CODE
ERR_RET1:
MOV CX,LNG_TRNS
ADD CX,CUR_TRNS
ADD CX,NO_TRNS
CALL STOP_CHK
STC
RET
;------------------------------------------------ 871010 -------------
;****************************************
;* *
;* SET AI FLAG *
;* *
;****************************************
ERR_SUB:
PUSH AX
;------------------------------------------------ PATCH FIX 88/02/25 -
AND AL,70H
CMP AL,70H
POP AX
PUSH AX
;
; TEST AL,80H ;MEDIA ?
;----------------------------------------------------------------------
JNZ ERR8 ;JUMP IF 1MB MEDIA
ERR5: ;SET 640KB MEDIA'S AI FLAG
MOV BX,OFFSET F2DD_RESULT ;2DD RESULT AREA OFFSET
MOV CL,1 ;SHIFT COUNT
JMP SHORT ERR_COMMON
ERR8: ;SET 1.2MB MEDIA'S AI FLAG
MOV BX,OFFSET DISK_RESULT ;2HD RESULT AREA OFFSET
MOV CL,3 ;SHIFT COUNT
ERR_COMMON:
AND AL,0FH ;ONLY UA
SHL AL,CL ;WORD(2DD) OR QWORD(3HD)
MOV CL,AL
XOR CH,CH
ADD BX,CX
PUSH ES
;------------------------------------------------ PATCH FIX 88/02/25 -
XOR CX,CX
MOV ES,CX ;SEGMENT 0
; MOV ES,CX ;SEGMENT 0
; XOR CX,CX
;---------------------------------------------------------------------
OR BYTE PTR ES:[BX],0C0H ;SET 'AI' FLAG
POP ES
POP AX
RET
;---------------------------------------------------------------------
;****************************************
;* *
;* SET BIOS INTERFACE PARAMETER *
;* *
;****************************************
CONV_REC:
MOV [DSK_TYP],0 ;SINGLE SIDED
MOV [COM],0D0H ;8"2D, 5"2DD
MOV [LNG_SEC],1024 ;8"2D, 5"HD
MOV [S_SEC],8 ;8"2D, 5"2D(8), 5"2DD(8)
;--------------------------------------------------------- 88/03/25 --
; CMP [SW_HD],0 ;FD ACCESS ?
; JE SKP_HDSET ;SKIP IF SO
; MOV [COM],00H ;COMMAND OF HARD
; JMP CMN_PASS
;---------------------------------------------------------------------
SKP_HDSET:
CMP [SW_5],0 ;8"FD ACCESS ?
JNE SKP_8FDSET ;SKIP IF NO
;
; 8"FD...
;
TEST [CURUA],08H
JE SKIP_VTB
MOV CH,3
NOT [DSK_TYP] ;V-1MFD IS ONLY 2-SIDED. 850510 **
JMP CMN_PASSFD
;
SKIP_VTB:
MOV BX,OFFSET BIDTBL
MOV AL,CURUA
XLAT
;--------------------------------------------------- 870913 MAMA -----
; MOV CURDA2,AL
; AND CURDA2,0F0H
;----------------
MOV [PWINF],AL
;----------------------------------------------- DOS5A 92/12/01 ------
;<patch BIOS50-P30>
extrn patch144_41:near
public SKP_8FDSETX, patch144_41_ret, CMN_PASSFD
jmp patch144_41
db 90h
patch144_41_ret:
;;;---------------------------------------------------------------------
;;; TEST AL,80H ;1MB ?
;;;--------------------------------------------------- 870913 MAMA -----
;;; JE SKP_8FDSETX ;SKIP IF 640KB
;;;---------------------------------------------------------------------
;
;-------ONLY 1 MB MEDIA AND 256KB HERE-------
;
MOV BX,OFFSET PREDNST
MOV AL,[CURUA]
XLAT ;GET MEDIA TYPE BYTE
;------------------------------------------------------ 871003 -------
MOV BX,OFFSET NBYTETBL ;DENSITY TABLE ADDR.
XLAT [BX] ;GET DENSITY
;---------------------------------------------------------------------
OR AL,AL
MOV CH,AL ;SET DENSITY
JE S_81 ;SKIP IF SINGLE MEDIA
NOT [DSK_TYP] ;DOUBLE SIDED
CMP CH,3
JE CMN_PASSFD ;SKIP IF 1024B
MOV [LNG_SEC],512 ;IBM-AT
MOV [S_SEC],15
JMP short CMN_PASSFD
;
; 8"FD SIGLE SIDE, SIGLE DENSITY
;
S_81:
MOV [COM],10H
MOV [LNG_SEC],128 ;SET BYTES/SECTOR
MOV CH,0 ;SECTOR LENGTH 128
MOV [S_SEC],26 ;SET NUMBER OF SECTORS ON TRACK
JMP short CMN_PASSFD
;
; 5"FD...
;
SKP_8FDSET:
;-------------------------------------------------- 870912 -----------
MOV BX,OFFSET BIDTBL5
MOV AL,[CURUA]
XLAT
MOV [PWINF],AL
TEST AL,80H ;1MB ?
JZ SKP_8FDSETX ;SKIP IF 640KB
MOV BX,OFFSET PREDENS5
MOV AL,[CURUA]
XLAT
MOV BX,OFFSET NBYTETBL5 ;DENSITY TABLE ADDR.
XLAT [BX] ;GET DENSITY
MOV CH,AL ;SET DENSITY
;----------------------------------------------- DOS5A 92/12/01 ------
;<patch BIOS50-P30>
extrn patch144_42:near
jmp patch144_42
db 3 dup (90h)
;---------------
; NOT [DSK_TYP]
; JMP SHORT CMN_PASSFD
;---------------------------------------------------------------------
SKP_8FDSETX:
;---------------------------------------------------------------------
MOV CH,2 ;SECTOR LENGTH 512
CMP AH,-1 ;5"2D(8)
JE SKP_5FD9 ;SKIP IF SO
CMP AH,-2 ;5"1D(8)
JE SKP_5FD9 ;SKIP IF SO
CMP AH,-5 ;5"2DD(8)
JE SKP_5FD9 ;SKIP IF SO
MOV [S_SEC],9
SKP_5FD9:
MOV [LNG_SEC],512
CMP AH,-2 ;5"1D(8)
JE CMN_PASSFD ;SKIP IF SO
CMP AH,-4 ;5"1D(9)
JE CMN_PASSFD ;SKIP IF SO
NOT [DSK_TYP]
CMN_PASSFD:
MOV BX,[S_SEC] ;SET NUMBER OF SECTOR ON TRACK
MOV AX,DX
DIV BL
MOV CL,AL ;SET CYLINDER #
INC AH
MOV DL,AH ;SET SECTOR #
XOR DH,DH ;SET HEAD #0
CMP [DSK_TYP],0 ;SINGLE SIDE ?
JE SKP_DSSET
SHR AL,1 ;/2
RCL DH,1 ;SET CYLINDER #
MOV CL,AL
SKP_DSSET:
CMN_PASS:
;------------------------------------------------------ 870913 MAMA --
; MOV AL,CURDA
; TEST CURUA,08H
; JNE CMN_BINSKIP
; CMP AL,90H
; JNE CMN_BINSKIP
; MOV AL,CURDA2 ;SET BI-DRIVE
CMN_BINSKIP:
; OR AL,CURUA
;----------------
MOV AL,[PWINF] ;SET DA/UA
;---------------------------------------------------------------------
RET
SET_LENGTH:
PUSH AX
PUSH DX
MOV AX,MAX_TRNS
CMP AX,LNG_TRNS
JBE SKP_X
MOV AX,LNG_TRNS
SKP_X:
SUB LNG_TRNS,AX
MOV CUR_TRNS,AX
MUL WORD PTR LNG_SEC
MOV BX,AX
POP DX
POP AX
RET
S_REC1:
MOV DL,1 ;SET SECTOR #
CMP BYTE PTR DSK_TYP,0 ;SINGLE SIDE
JE SNG_SIDE ;SKIP IF SO
XOR DH,01H
JNZ S_REC_RET
SNG_SIDE:
INC CL ;INCREMENT CYLINDER #
S_REC_RET:
PUSH AX
MOV AX,ES
CLC
ADD BP,BX ;SET I/O BUFFER
JNB S_REC2
ADD AX,1000H
MOV ES,AX
S_REC2:
POP AX
RET
VERIFY:
CMP BYTE PTR VRFY_FLG,0 ;VERIFY FLG ON ?
JE V_RET ;SKIP IF NO
MOV BYTE PTR RTRY_CNT,10 ;SET RETRY TIMES
;--------------------------------------------------------- 88/03/25 --
; CMP BYTE PTR SW_HD,0 ;FD ACCESS ?
; JE VRFY_ENT ;SKIP IF SO
; MOV BYTE PTR RTRY_CNT,3 ;SET RETRY TIMES
;---------------------------------------------------------------------
VRFY_ENT:
PUSH BP
PUSH ES
XOR BP,BP
MOV ES,BP
MOV AH,01H
OR AH,COM ;FORCE TO READ
CALL ROMBIO
POP ES
POP BP
JC VRFY_ERR
V_RET:
RET
VRFY_ERR:
DEC BYTE PTR RTRY_CNT ;DECREMENT RETRY COUNTER
JZ VRFY_ERR1
CALL RCBL ;EXECUTE RECALIBLATE
JMP VRFY_ENT
VRFY_ERR1:
POP CX
JMP ERROR
;
; SET COMMAND
;
S_HCMD:
;--------------------------------------------------------- 88/03/25 --
; MOV AL,CURUA
; JMP SHORT S_CMD10
;---------------------------------------------------------------------
S_CMD:
;-------------------------------------------------- 870913 MAMA ------
; MOV AL,CURDA
; TEST CURUA,08H
; JNE S_CMD05
; CMP AL,90H
; JNE S_CMD05
; MOV AL,CURDA2
S_CMD05:
; OR AL,CURUA
;----------------
MOV AL,[PWINF]
;---------------------------------------------------------------------
S_CMD10:
MOV AH,COM
OR AH,COM1
CALL ROMBIO
RET
;------------------------------------------------ DB ERROR PROC ----
DB_RW:
MOV BYTE PTR RTRY_CNT,10
;--------------------------------------------------------- 88/03/25 --
; CMP BYTE PTR SW_HD,0 ;HD MODE ?
; JE SKP_DB_HD ;JUMP IF NOT
; MOV BYTE PTR RTRY_CNT,3
DB_LOOP_HD: ;---------------------- BY MAMA -
; CALL S_HCMD ;HD I/O --------------- BY MAMA -
; JNC DB_RET ;NO ERROR ------------- BY MAMA -
; DEC [RTRY_CNT] ;---------------------- BY MAMA -
; JZ DB_ERET ;RETRY IS OVER -------- BY MAMA -
; CALL RCBL ;RECALIBRATE ---------- BY MAMA -
; JMP SHORT DB_LOOP_HD ;RETRY ! -------------- BY MAMA -
;---------------------------------------------------------------------
SKP_DB_HD:
DB_LOOP:
CALL S_CMD ;SET COMMAND AND CALL FD BIO
JNC DB_RET ;JUMP IF NOT ERROR
DEC BYTE PTR RTRY_CNT
JZ DB_ERET
CALL RCBL
JMP SHORT DB_LOOP
DB_ERET:
STC
DB_RET:
RET
COMP_DB:
PUSH AX
PUSH CX
PUSH DX
MOV DX,ES ;GET I/O BUFFER SEGMENT
MOV CL,4
SHL DX,CL
ADD DX,BP
MOV AX,0FFFFH
SUB AX,DX ;REST BYTES UNTIL DB ERROR
XOR DX,DX
DIV WORD PTR LNG_SEC ;GET TRANSFER LENGTH IN AX
MOV DB_TRNS,AX ;SAVE IT
MUL WORD PTR LNG_SEC
MOV BX,AX
POP DX
POP CX
POP AX
RET
;-------------------------------------------------------- BY MAMA --
PAGE
IF HDSASI ;-----------------------------------------------------------
;****************************************
;* *
;* HARD DISK READ/WRITE *
;* *
;****************************************
HD_RW:
MOV NO_TRNS,0 ;CLEAR NON-TRANSFED LENGTH FIELD
XOR BX,BX ;CLEAR BX
MOV AL,CURUA ;SET CURRENT UA
OR AL,CURDA ;MAKE DA/UA
MOV BX,OFFSET EXLPTBL+1 ;SET CONVERTING TABLE
XOR CX,CX
HD_RW10:
CMP BYTE PTR[BX],AL ;FIND FIRST SAME DA/UA
JE HD_RW20 ;SKIP IF HIT
INC BX
INC BX ;POINT NEXT ENTRY
INC CX ;INCREMENT COUNTER
JMP HD_RW10
HD_RW20:
MOV AL,CURDRV
SUB AL,CL ;GET RELATIVE VOLUME NUMBER IN DEV
MOV VOLNUM,AL ;SAVE IT
MOV SI,OFFSET VT_LAST ;850505
CALL GET_VT ;850505
TEST CURUA,08H
JNE HD_RW30
MOV BX,OFFSET HD_LAST ;SET VOL SIZE TABLE ADDR
TEST CURUA,01H ;#1 ?
JZ HD_RW30 ;SKIP IF DEV=#0
MOV BX,OFFSET HD1_LAST
HD_RW30:
MOV CX,LNG_TRNS
SHL AL,1 ;DWORD POINTER
SHL AL,1
XOR AH,AH ;CLEAR AH
ADD BX,AX
CMP DX,[BX] ;REQUESTED START SECTOR IN THIS VOL ?
JMP SHORT STRT_SEC_OK ;1024.
;
; FAIL TO I/O...
;
MOV NO_TRNS,CX
MOV LNG_TRNS,0
JMP HD_RW_RET ;ERROR RETURN (NO DONE)
;
STRT_SEC_OK:
ADD CX,DX
SUB CX,[BX] ;REQUESTED LAST SECTOR IN THIS VOL ?
JMP SHORT SEC_OK ;
MOV NO_TRNS,CX
SUB LNG_TRNS,CX ;SET TRANSING DATA LENGTH
;
; FINISH TO CHECK REQUESTED SECTOR NUMBER
;
SEC_OK:
MOV CX,LNG_TRNS ;GET TRANSFERING DATA LENGTH
MOV CUR_TRNS,CX
MOV CL,VOLNUM
XOR CH,CH
SHL CL,1 ; CL=CL*4, ENTRY HAS 4 BYTE
SHL CL,1
MOV SI,OFFSET VT_OFFSET ;850505
CALL GET_VT ;850505
CALL GET_VBPS ;850505 GET B.P.S INTO (SI)
TEST CURUA,08H
JNE SEC_OK10
MOV SI,BPS ;850507 SET BYTE/SECTOR IN DEV #0
MOV BX,OFFSET HD_OFFSET
TEST CURUA,01H ;#0 DEV
JZ SEC_OK10 ;SKIP IF DEV=#0
MOV SI,BPS1 ;SET BYTE PER SECTOR IN DEV #1
MOV BX,OFFSET HD1_OFFSET
SEC_OK10:
ADD BX,CX ;POINT CURRENT OFFSET TABLE
MOV CX,4
MOV AX,DX ;SET START SECTOR
XOR DX,DX
MUL CX ;1024. -> 256.
ADD AX,[BX]
ADC DX,[BX+2] ;REP BY 256 BPS
SEC_OK15:
MOV CX,AX ;(DX.CX) IS NUMBER OF SECTOR
HD_LOOP:
CMP CUR_TRNS,64
JBE L_OK ;SKIP IF CUR_TRNS < 64K
MOV CUR_TRNS,64
L_OK:
PUSH CX
MOV CL,10
MOV AX,CUR_TRNS
MOV BX,AX
SHL BX,CL
SUB LNG_TRNS,AX
POP CX
MOV BYTE PTR RTRY_CNT,3 ;SET RETRY TIMES
RW_LOOP_HD:
CALL S_HCMD ;SET BIO PARAMETER
JC RTRY_RW_HD
CALL VERIFY
HD_RW_ENT:
CMP WORD PTR LNG_TRNS,0
JE HD_RW_RET
MOV AX,CUR_TRNS
HD_RW_SKIP:
SHL AX,1
SHL AX,1
ADD CX,AX
ADC DX,0 ;10-25-85
MOV AX,LNG_TRNS
MOV CUR_TRNS,AX
CLC
ADD BP,BX
PUSH AX
MOV AX,ES
JNB HD_BOUN
ADD AX,1000H
MOV ES,AX
HD_BOUN:
POP AX
JMP HD_LOOP
HD_RW_RET:
CMP NO_TRNS,0
JE NO_ERR_HD
MOV CUR_TRNS,0
MOV AH,0C0H
JMP ERROR
NO_ERR_HD:
JMP RW_RET
RTRY_RW_HD:
;------------------------------------------ DB ERR CHECK ---------
AND AH,0F0H
CMP AH,20H ;DB ERROR ?
JE DB_ERR_HD ;YES,
;-----------------------------------------------------------------
DEC BYTE PTR RTRY_CNT ;DECREMENT RETRY COUNTER
JE HD_ERROR
CALL RCBL
JMP RW_LOOP_HD
;------------------------------------------ DB ERROR PROC --------
DB_ERR_HD:
CALL COMP_DB
OR BX,BX
JZ SKP_PRER_HD
MOV [RTRY_CNT],3
RTRY_PRER:
CALL S_HCMD ;CHG "S_CMD" >> "S_HCMD" --BY MAMA--
JNC PRER_OK
DEC [RTRY_CNT]
JZ HD_ERROR
CALL RCBL
JMP SHORT RTRY_PRER
HD_ERROR:
JMP ERROR
PRER_OK:
CALL VERIFY
MOV AX,[DB_TRNS]
SUB [CUR_TRNS],AX
SHL AX,1
SHL AX,1
PRER_OK05:
CLC
ADD CX,AX
ADC DX,0 ;10-23-85
ADD BP,BX
SKP_PRER_HD:
MOV BX,1024
CALL DB_ERR_DB
CALL VERIFY
ADD CX,4 ;86-08-20
ADC DX,0 ;10-23-85
DEC [CUR_TRNS]
JNZ SKP_RWDB_HD
JMP HD_RW_ENT
SKP_RWDB_HD:
ADD BP,BX
PUSH CX
MOV CL,10
MOV BX,[CUR_TRNS]
SHL BX,CL
POP CX
MOV [RTRY_CNT],3
REAR_HD:
CALL S_HCMD ;CHG "S_CMD" >> "S_HCMD" --BY MAMA--
JNC SKP_RW2_HD
DEC [RTRY_CNT]
JZ HD_ERROR
CALL RCBL
JMP SHORT REAR_HD
SKP_RW2_HD:
CALL VERIFY
JMP HD_RW_ENT
ENDIF ;---------------------------------------------------------------
IF HDSASI ;-----------------------------------------------------------
;------------------------------------------------ BY MAMA ----------
CALLOG:
MOV AL,CURUA ;SET CURRENY UA
OR AL,CURDA ;MSKE DA/UA
MOV BX,OFFSET EXLPTBL+1 ;SET CONVERTING TABLE
XOR CX,CX ;CLEAR CX
CALLOG10:
CMP BYTE PTR[BX],AL ;FIND FIRST SAME DA/UA
JE CALLOG20 ;SKIP IF MATCH
INC BX
INC BX
INC CX
JMP CALLOG10
CALLOG20:
MOV AL,CURDRV
SUB AL,CL ;GET RELATIVE VOLUME NUMBER IN DEV
TEST [CURUA],08H ;850505 VIRTUAL ?
JZ CALLOG30X ;850505 NO,
MOV BX,OFFSET VBPB ;850505
MOV AL,[CURUA] ;850505
AND AL,07H ;850505
JMP CALLOG30 ;850505
CALLOG30X: ;850505
MOV BX,OFFSET HDDSK5_1
TEST CURUA,01H
JZ CALLOG30 ;SKIP IF DEV=#0
MOV BX,OFFSET HDDSK5_2
CALLOG30:
XOR AH,AH
MOV CL,13
XOR CH,CH
MUL CX
ADD BX,AX
MOV SI,BX
CALLOG35:
CALL GET_SW ;850505
MOV BYTE PTR [DI],0 ;850505 CLEAR SWITCH
CMP WORD PTR [SI],1024 ;850505 CHECK B.P.S.
JE CALLOG40 ;850505
MOV BYTE PTR[DI],-1 ;850505 SET X2-ID.
CALLOG40:
RET
ENDIF ;---------------------------------------------------------------
IF HDSASI ;-----------------------------------------------------------
;850505.850505.850505.850505.850505......
; .
; FOR VIRTUAL DRIVE .
; .
;......850505.850505.850505.850505.850505
GET_VT:
;......
MOV BL,[CURUA]
AND BX,0007H
SHL BX,1
SHL BX,1
ADD BX,SI
RET
GET_VBPS:
;........
PUSH BX
MOV BL,[CURUA]
AND BX,0007H
SHL BX,1
MOV SI,[BX.VBPS]
POP BX
RET
CHECK_X2SW:
;..........
PUSH BX
PUSH SI
MOV BL,[CURUA]
TEST BL,08H
JZ CHK_SW1
AND BX,0007H
LEA SI,[BX.X2_SW_VT]
JMP SHORT CHK_SW2
CHK_SW1:
MOV SI,OFFSET X2_SW_00
TEST BL,01H
JZ CHK_SW2
MOV SI,OFFSET X2_SW_01
CHK_SW2:
TEST BYTE PTR [SI],-1
POP SI
POP BX
RET
GET_SW:
;......
TEST [CURUA],08H
JZ GET_SW350
MOV BL,[CURUA]
AND BX,0007H
LEA DI,[BX.X2_SW_VT]
JMP SHORT GET_SW351
GET_SW350:
MOV DI,OFFSET X2_SW_00
TEST [CURUA],01H
JZ GET_SW351
MOV DI,OFFSET X2_SW_01
GET_SW351:
RET
ENDIF ;---------------------------------------------------------------
;------------------------------------------------------------;
; ;
; RECALIBRATE HERE ;
; ;
;------------------------------------------------------------;
RCBL:
MOV AH,07H ;SET RECALIBLATE COMMAND
CALL ROMBIO ;CALL ROM BIO ROUTINE
RET
;------------------------------------------------------------;
; ;
; CALL DISK BIO ROM ;
; ;
;------------------------------------------------------------;
ROMBIO:
XOR AH,AH
CLC
RET
PAGE
;
; Static Request Header:
;
SRHEAD STRUC
REQLEN DB ? ; Length in bytes of request block
REQUNIT DB ? ; Device unit number
REQFUNC DB ? ; Type of request
REQSTAT DW ? ; Status Word
DB 8 DUP(?) ; Reserved for queue links
SRHEAD ENDS
;
; Generic IOCTL Request structure
IOCTL_Req Struc
DB (size SRHEAD) DUP(?)
MajorFunction DB ? ; Function Code
MinorFunction DB ? ; Function Category
Reg_SI DW ?
Reg_DI DW ?
GenericIOCTL_Packet DD ? ; Pointer to Data Buffer
IOCTL_Req ENDS
;
; Definitions for IOCTL_Req.MinorFunction:
;
GEN_IOCTL_WRT_TRK EQU 40h
GEN_IOCTL_RD_TRK EQU 60h
GEN_IOCTL_FN_TST EQU 20h ; Used to diff. bet reads and wrts
;
; These are all the important structures and equates for ioctl
;
;** BIOS PARAMETER BLOCK DEFINITION
;
; The BPB contains information about the disk structure. It dates
; back to the earliest FAT systems and so FAT information is
; intermingled with physical driver information.
;
; A boot sector contains a BPB for its device; for other disks
; the driver creates a BPB. DOS keeps copies of some of this
; information in the DPB.
;
; The BDS structure contains a BPB within it.
;
A_BPB STRUC
BPB_BYTESPERSECTOR DW ?
BPB_SECTORSPERCLUSTER DB ?
BPB_RESERVEDSECTORS DW ?
BPB_NUMBEROFFATS DB ?
BPB_ROOTENTRIES DW ?
BPB_TOTALSECTORS DW ?
BPB_MEDIADESCRIPTOR DB ?
BPB_SECTORSPERFAT DW ?
BPB_SECTORSPERTRACK DW ?
BPB_HEADS DW ?
BPB_HIDDENSECTORS DW ?
DW ?
BPB_BIGTOTALSECTORS DW ?
DW ?
DB 6 DUP(?) ; NOTE: many times these
; ; 6 bytes are omitted
; ; when BPB manipulations
; ; are performed!
A_BPB ENDS
;*****************************;*
; BLOCK DRIVERS ;*
;*****************************;*
; IOCTL SUB-FUNCTIONS
IOCTL_GET_DEVICE_INFO EQU 0
IOCTL_SET_DEVICE_INFO EQU 1
IOCTL_READ_HANDLE EQU 2
IOCTL_WRITE_HANDLE EQU 3
IOCTL_READ_DRIVE EQU 4
IOCTL_WRITE_DRIVE EQU 5
IOCTL_GET_INPUT_STATUS EQU 6
IOCTL_GET_OUTPUT_STATUS EQU 7
IOCTL_CHANGEABLE? EQU 8
IOCTL_DeviceLocOrRem? EQU 9
IOCTL_HandleLocOrRem? EQU 0Ah ;10
IOCTL_SHARING_RETRY EQU 0Bh ;11
GENERIC_IOCTL_HANDLE EQU 0Ch ;12
GENERIC_IOCTL EQU 0Dh ;13
IOCTL_GET_DRIVE_MAP EQU 0Eh ;14
IOCTL_SET_DRIVE_MAP EQU 0Fh ;15
IOCTL_QUERY_HANDLE EQU 10h ;16
IOCTL_QUERY_BLOCK EQU 11h ;17
; GENERIC IOCTL CATEGORY CODES
IOC_OTHER EQU 0 ; Other device control J.K. 4/29/86
IOC_SE EQU 1 ; SERIAL DEVICE CONTROL
IOC_TC EQU 2 ; TERMINAL CONTROL
IOC_SC EQU 3 ; SCREEN CONTROL
IOC_KC EQU 4 ; KEYBOARD CONTROL
IOC_PC EQU 5 ; PRINTER CONTROL
IOC_DC EQU 8 ; DISK CONTROL (SAME AS RAWIO)
; GENERIC IOCTL SUB-FUNCTIONS
RAWIO EQU 8
; RAWIO SUB-FUNCTIONS
GET_DEVICE_PARAMETERS EQU 60H
SET_DEVICE_PARAMETERS EQU 40H
READ_TRACK EQU 61H
WRITE_TRACK EQU 41H
VERIFY_TRACK EQU 62H
FORMAT_TRACK EQU 42H
GET_MEDIA_ID EQU 66h ;AN000;AN003;changed from 63h
SET_MEDIA_ID EQU 46h ;AN000;AN003;changed from 43h
GET_ACCESS_FLAG EQU 67h ;AN002;AN003;Unpublished function.Changed from 64h
SET_ACCESS_FLAG EQU 47h ;AN002;AN003;Unpublished function.Changed from 44h
SENSE_MEDIA_TYPE EQU 68H ;Added for 5.00
; SPECIAL FUNCTION FOR GET DEVICE PARAMETERS
BUILD_DEVICE_BPB EQU 000000001B
; SPECIAL FUNCTIONS FOR SET DEVICE PARAMETERS
INSTALL_FAKE_BPB EQU 000000001B
ONLY_SET_TRACKLAYOUT EQU 000000010B
TRACKLAYOUT_IS_GOOD EQU 000000100B
; SPECIAL FUNCTION FOR FORMAT TRACK
STATUS_FOR_FORMAT EQU 000000001B
DO_FAST_FORMAT equ 000000010B ;AN001;
; CODES RETURNED FROM FORMAT STATUS CALL
FORMAT_NO_ROM_SUPPORT EQU 000000001B
FORMAT_COMB_NOT_SUPPORTED EQU 000000010B
; DEVICETYPE VALUES
MAX_SECTORS_IN_TRACK EQU 63 ; MAXIMUM SECTORS ON A DISK.(Was 40 in DOS 3.2)
DEV_5INCH EQU 0
DEV_5INCH96TPI EQU 1
DEV_3INCH720KB EQU 2
DEV_8INCHSS EQU 3
DEV_8INCHDS EQU 4
DEV_HARDDISK EQU 5
DEV_OTHER EQU 7
DEV_3INCH1440KB EQU 7
DEV_3INCH2880KB EQU 9
MAX_DEV_TYPE EQU 9 ; MAXIMUM DEVICE TYPE THAT WE
; CURRENTLY SUPPORT.
A_SECTORTABLE STRUC
ST_SECTORNUMBER DW ?
ST_SECTORSIZE DW ?
A_SECTORTABLE ENDS
A_DEVICEPARAMETERS STRUC
DP_SPECIALFUNCTIONS DB ?
DP_DEVICETYPE DB ?
DP_DEVICEATTRIBUTES DW ?
DP_CYLINDERS DW ?
DP_MEDIATYPE DB ?
DP_BPB DB SIZE A_BPB DUP (?)
DP_TRACKTABLEENTRIES DW ?
DP_SECTORTABLE DB MAX_SECTORS_IN_TRACK * SIZE A_SECTORTABLE DUP (?)
A_DEVICEPARAMETERS ENDS
A_TRACKREADWRITEPACKET STRUC
TRWP_SPECIALFUNCTIONS DB ?
TRWP_HEAD DW ?
TRWP_CYLINDER DW ?
TRWP_FIRSTSECTOR DW ?
TRWP_SECTORSTOREADWRITE DW ?
TRWP_TRANSFERADDRESS DD ?
A_TRACKREADWRITEPACKET ENDS
;AN001; - FP_TRACKCOUNT is only meaningful when FP_SPECIALFUNCTIONS bit 1 = 1.
A_FORMATPACKET STRUC
FP_SPECIALFUNCTIONS DB ?
FP_HEAD DW ?
FP_CYLINDER DW ?
FP_TRACKCOUNT DW 1
A_FORMATPACKET ENDS
A_VERIFYPACKET STRUC
VP_SPECIALFUNCTIONS DB ?
VP_HEAD DW ?
VP_CYLINDER DW ?
A_VERIFYPACKET ENDS
A_MEDIA_ID_INFO STRUC
MI_LEVEL DW 0 ;J.K. 87 Info. level
MI_SERIAL DD ? ;J.K. 87 Serial #
MI_LABEL DB 11 DUP (' ') ;J.K. 87 volume label
MI_SYSTEM DB 8 DUP (' ') ;J.K. 87 File system type
A_MEDIA_ID_INFO ENDS
A_DISKACCESS_CONTROL STRUC ;AN002; Unpublished function. Only for Hard file.
DAC_SPECIALFUNCTIONS DB 0 ;AN002; Always 0
DAC_ACCESS_FLAG DB 0 ;AN002; Non Zero - allow disk I/O to unformatted hard file
A_DISKACCESS_CONTROL ENDS ;AN002; 0 - Disallow disk I/O to unformatted hard file
A_MEDIA_SENSE STRUC ; Media sense structure added 5.00
MS_ISDEFAULT DB ? ; If 1 type returned is drv default
MS_DEVICETYPE DB ? ; Drive type
MS_RESERVED1 DB ? ; RESERVED
MS_RESERVED2 DB ? ; RESERVED
A_MEDIA_SENSE ENDS
EXT_BOOT_SIGNATURE EQU 41 ;Extended boot signature
;
EXT_BPB_INFO STRUC
EBPB_BYTESPERSECTOR DW ?
EBPB_SECTORSPERCLUSTER DB ?
EBPB_RESERVEDSECTORS DW ?
EBPB_NUMBEROFFATS DB ?
EBPB_ROOTENTRIES DW ?
EBPB_TOTALSECTORS DW ?
EBPB_MEDIADESCRIPTOR DB ?
EBPB_SECTORSPERFAT DW ?
EBPB_SECTORSPERTRACK DW ?
EBPB_HEADS DW ?
EBPB_HIDDENSECTOR DD ?
EBPB_BIGTOTALSECTORS DD ?
EXT_BPB_INFO ENDS
;
;AN001; EXT_PHYDRV, EXT_CURHD included in the header for OS2.
EXT_IBMBOOT_HEADER STRUC
EXT_BOOT_JUMP DB 3 DUP (?)
EXT_BOOT_OEM DB 8 DUP (?)
EXT_BOOT_BPB DB size EXT_BPB_INFO dup (?)
EXT_PHYDRV DB 80h
EXT_CURHD DB 0
EXT_BOOT_SIG DB EXT_BOOT_SIGNATURE
EXT_BOOT_SERIAL DD ?
EXT_BOOT_VOL_LABEL DB 11 DUP (?)
EXT_SYSTEM_ID DB 8 DUP (?)
EXT_IBMBOOT_HEADER ENDS
; The following structure defines the disk parameter table
DISK_PARMS STRUC
DISK_SPECIFY_1 DB ?
DISK_SPECIFY_2 DB ?
DISK_MOTOR_WAIT DB ? ; Wait till motor off
DISK_SECTOR_SIZ DB ? ; Bytes/Sector (2 = 512)
DISK_EOT DB ? ; Sectors per track (MAX)
DISK_RW_GAP DB ? ; Read Write Gap
DISK_DTL DB ?
DISK_FORMT_GAP DB ? ; Format Gap Length
DISK_FILL DB ? ; Format Fill Byte
DISK_HEAD_STTL DB ? ; Head Settle Time (MSec)
DISK_MOTOR_STRT DB ? ; Motor start delay
DISK_PARMS ENDS
ROMRead equ 6
ROMWrite equ 5
ROMVerify equ 1
ROMFormat equ 0DH
; values for various flags in bds_flags.
fnon_removable equ 01h ;for non-removable media
fchangeline equ 02h ;if changeline supported on drive
return_fake_bpb equ 04h ; when set, don't do a build bpb
; just return the fake one
good_tracklayout equ 08h ; the track layout has no funny sectors
fi_am_mult equ 10h ;if more than one logical for this physical
fi_own_physical equ 20h ;signify logical owner of this physical
fchanged equ 40h ;indicates media changed
set_dasd_true equ 80h ; set dasd before next format
fchanged_by_format equ 100h ;media changed by format
unformatted_media equ 200h ;an001; fixed disk only
MAXERR = 5
;
; various form factors to describe media
;
ff48tpi equ 0
ff96tpi equ 1
ffsmall equ 2
ffhardfile equ 5
ffother equ 7
ff288 equ 9 ; 2.88 MB drive
bds_struc struc
bds_link dd 0ffffh ; link to next bds
bds_drivenum db 80 ; int 13 drive number
bds_drivelet db 3 ; dos drive number
; We want to embed a BPB declaration here, but we can't initialize
; it properly if we do, so we duplicate the byte/word/dword architecture
; of the BPB declaration.
;BDS_BPB db size BPBSTRUC dup (?) ; actual BPB
BDS_BPB dw 512 ; BPB_BYTESPERSECTOR
db 1 ; BPB_SECTORSPERCLUSTER
dw 1 ; BPB_RESERVEDSECTORS
db 2 ; BPB_NUMBEROFFATS
dw 16 ; BPB_ROOTENTRIES
dw 0 ; BPB_TOTALSECTORS
db 0f8h ; BPB_MEDIADESCRIPTOR
dw 1 ; BPB_SECTORSPERFAT
dw 0 ; BPB_SECTORSPERTRACK
dw 0 ; BPB_HEADS
dd 0 ; BPB_HIDDENSECTORS
dd 0 ; BPB_BIGTOTALSECTORS
bds_fatsiz db 0 ; flags...
bds_opcnt dw 0 ; open ref. count
bds_formfactor db 3 ; form factor index
bds_flags dw 0020h ; various flags
bds_ccyln dw 40 ; max number of cylinders
BDS_RBPB db size A_BPB dup (0) ; recommended BPB
bds_track db -1 ; last track accessed on drive
bds_tim_lo dw 1 ; time of last access. keep
bds_tim_hi dw 0 ; these contiguous.
bds_volid db "NO NAME ",0 ; volume id of medium
bds_vol_serial dd 0 ;current volume serial number from boot record
bds_filesys_id db "FAT12 ",0 ; current file system id from boot record
bds_struc ends
; The assembler will generate bad data for "size bds_volid", so we'll
; define an equate here.
VOLID_SIZ equ 12
bdsm_ismini equ bds_tim_lo ; overlapping bds_tim_lo
bdsm_hidden_trks equ bds_tim_hi ; overlapping bds_tim_hi
max_mini_dsk_num = 23 ; max # of mini disk ibmbio can support
BPB_Type struc
secsize dw ?
secall db ?
resnum dw ?
fatnum db ?
dirnum dw ?
secnum dw ?
fatid db ?
fatsize dw ?
slim dw ?
hlim dw ?
hidden dw ?
BPB_Type ends
; Bios Parameter Block definition
BPBLOCK STRUC
BPSECSZ DW ? ; Size in bytes of physical sector
BPCLUS DB ? ; Sectors/Alloc unit
BPRES DW ? ; Number of reserved sectors
BPFTCNT DB ? ; Number of FATs
BPDRCNT DW ? ; Number of directory entries
BPSCCNT DW ? ; Total number of sectors
BPMEDIA DB ? ; Media descriptor byte
BPFTSEC DW ? ; Number of sectors taken up by one FAT
BPBLOCK ENDS
;----------------------------------------------- DOS5 91/01/10 -------
;
; The following two sets of variables are used to hold values for
; disk I/O operations
;CURSEC DB 0 ; current sector
;CURHD DB 0 ; current head
;CURTRK DW 0 ; current track
;
;
; The following are used for IOCTL function calls
;
;
;HDNUM DB 0 ; Head number
;TRKNUM DW 0 ; Track being manipulated
;GAP_PATCH DB 50h ; Format gap patched into DPT
;FORMT_EOT DB 8 ; EOT used for format
;
;--------------------------------------------------------- 89/08/08 --
;PATCH0 DW 0
;PATCH1 DW 0
;PATCH3 DB 0
;---------------------------------------------------------------------
;----------------------------------------------- DOS5 91/01/10 -------
;MAX_SECTORS_CURR_SUP equ 40 ; current maximum sec/trk that
; ; we support
;
;
;
; TrackTable is an area for saving information passwd by the set device
; parameter function for laster use my Read/Write/Format/Verify.
;
;TrackTable db MAX_SECTORS_CURR_SUP * size a_SectorTable dup (?)
;
;
;sectorsPerTrack dw 15
;
;mediaType db 0
;
;Media_Set_For_Format db 0 ; 1 if we have done an Int 13 Set Media
; ; Type for Format call
;
;fSetOwner db 0
;
;PART_NUM DB 0
;---------------------------------------------------------------------
; ==========================================================================
;
; NOTE: GetAccessFlag/SetAccessFlag is unpublished function.
;
; This function is intended to give the user to control the
; bds table flags of unformatted_media bit.
; GetAccessFlag will show the status -
; a_DiskAccess_Control.dac_access_flag = 0 disk i/o not allowed
; 1 disk i/o allowed
; SetAccessFlag will set/reset the unformatted_media bit in flags -
; a_DiskAccess_Control.dac_access_flag = 0 allow disk i/o
; 1 disallow disk i/o
; ==========================================================================
; generic ioctl dispatch tables
IoReadJumpTable db 8 ;maximum number (zero based)
dw GetDeviceParameters ;60h
dw ReadTrack ;61h
dw VerifyTrack ;62h
dw Cmd_Error_Proc ;overlapped with os2 subfunction
dw Cmd_Error_Proc
dw Cmd_Error_Proc
dw GetMediaId ;66h
dw GetAccessFlag ;67h unpublished function
dw SenseMediaType ;68
IoWriteJumpTable db 7
dw SetDeviceParameters ;40h
dw WriteTrack ;41h
dw FormatTrack ;42h
dw Cmd_Error_Proc
dw Cmd_Error_Proc
dw Cmd_Error_Proc
dw SetMediaId ;46h
dw SetAccessFlag ;47h unpublished function
; ==========================================================================
; IOC_DC_Table
;
; This table contains all of the valid generic IOCtl Minor codes for
; major function 08 to be used by the Ioctl_Support_Query function.
; Added for 5.00
; ==========================================================================
IOC_DC_Table LABEL BYTE
db GET_DEVICE_PARAMETERS ; 60H
db SET_DEVICE_PARAMETERS ; 40H
db READ_TRACK ; 61H
db WRITE_TRACK ; 41H
db VERIFY_TRACK ; 62H
db FORMAT_TRACK ; 42H
db GET_MEDIA_ID ; 66h changed from 63h
db SET_MEDIA_ID ; 46h changed from 43h
db GET_ACCESS_FLAG ; 67h Unpublished func changed frm 64h
db SET_ACCESS_FLAG ; 47h Unpublished func changed frm 44h
db SENSE_MEDIA_TYPE ; 68 Added in 5.00
IOC_DC_TABLE_LEN EQU $ - OFFSET IOC_DC_Table
;
;Generic$IOCTL:
; Perform Generic IOCTL request
; Input:
; al - unit number
; Output:
; if carry set then al contains error code
;
Generic$IOCTL_CODE PROC FAR
Generic$IOCTL_CODE ENDP
CALL CNVDRV ;CONVERT DA/UA
MOV AL,CURDRV ;
les bx,ds:[PTRSAV] ; es:bx points to request header.@DOS5
call SetDrive ; ds:di points to BDS for drive.
;
; At this point:
; es:bx - points to the Request Header
; ds:di points to the BDS for the drive
;
cmp es:[bx].MajorFunction, RAWIO
jne IOCTL_Func_Err
mov al, es:[bx].MinorFunction
mov si, offset IOReadJumpTable
test al, GEN_IOCTL_FN_TST ; Test of req. function
jnz NotGenericIoctlWrite ; function is a Read.
mov si, offset IOWriteJumpTable
NotGenericIoctlWrite:
and al, 0fH
cmp al, cs:[si]
ja IOCTL_Func_Err
cbw
shl ax, 1
inc si
add si,ax
les bx, es:[bx].GenericIOCTL_Packet
call cs:[si]
jc FailGeneric$IOCTL
jmp exit
FailGeneric$IOCTL:
jmp ERR_EXIT
IOCTL_Func_Err:
jmp CMD_ERR
;------------------------------------------------DOS5 90/12/14-----------
Cmd_Error_Proc:
MOV AL,3
STC
RET
;------------------------------------------------------------------------
PAGE
;
; GetDeviceParameters:
;
; Input: DS:DI points to BDS for drive
; ES:BX points to device parameter packet
;
GetDeviceParameters proc near
mov al, byte ptr ds:[di].BDS_FormFactor
mov byte ptr es:[bx].DP_DeviceType, al
mov ax, word ptr ds:[di].BDS_Flags
and ax,fNon_Removable+fChangeline ; mask off other bits
mov word ptr es:[bx].DP_DeviceAttributes, ax
mov ax, word ptr ds:[di].BDS_cCyln
mov word ptr es:[bx].DP_Cylinders, ax
xor al, al
mov byte ptr es:[bx].DP_MediaType, al
lea si, byte ptr [di].BDS_RBPB.BPB_BYTESPERSECTOR
mov cx, size A_BPB - 6 ; for now use 'small' BPB
test byte ptr es:[bx].DP_SpecialFunctions, BUILD_DEVICE_BPB
jz use_BPB_present
call CheckSingle
;--------------------------------------------------------- 88/05/28 --
;----------------------------------------------------- 89/07/27 ---
TEST BYTE PTR [CURDA],10H
JZ GET_PARA_10
JMP GET_PARA_FD
GET_PARA_10:
PUSH DS
PUSH BX
;----------------------------------------------------- 89/07/27 ---
push es
CALL READ_FAT
JC GET_ERR
MOV AL,CURDA
MOV AH,ES:BYTE PTR [DI]
call POINTBPB10 ;POINT SI BPB
;---------------------------------------------------------------------
JC GET_ERR
pop es
POP BX
POP DS
MOV CX,SIZE A_BPB - 6 ;SMALL BPB
use_BPB_present:
lea di, byte ptr [bx].DP_BPB
PUSH DI
rep movsb
POP DI
;----------------------------------------------- DOS5 91/04/01 -------
JMP Get_Parm_OK
;---------------
; test byte ptr es:[bx].DP_SpecialFunctions, BUILD_DEVICE_BPB
; jz Get_Parm_OK
; TEST CURDA,10H
; JNZ GET_PARA_FD
; CMP MOSW,0FFH
; JNZ GET_PARA_025
; MOV BYTE PTR ES:[DI].BPB_SECTORSPERTRACK,40H
; MOV BYTE PTR ES:[DI].BPB_HEADS,1
; JMP short GET_PARA_028
;GET_PARA_025:
; CALL SENSE_HD
; JC Get_Parm_Ret
; MOV BYTE PTR ES:[DI].BPB_SECTORSPERTRACK,DL
; MOV BYTE PTR ES:[DI].BPB_HEADS,DH
;GET_PARA_028:
; TEST CURDA, 20H
; JNZ GET_PARA_030
; MOV SI,OFFSET HD_OFFSET
; JMP short GET_PARA_040
;GET_PARA_030:
; MOV SI,OFFSET HDS_OFFSET
;GET_PARA_040:
; XOR AH,AH
; MOV AL,CURUA
; MOV CL,4
; SHL AX,CL
; ADD SI,AX
; CALL CHECK_PART
; XOR AH,AH
; MOV AL,PART_NUM
; SHL AX,1
; SHL AX,1
; ADD SI,AX
; MOV AX,WORD PTR [SI]
; MOV ES:[DI].BPB_HIDDENSECTORS,AX
; JMP short Get_Parm_OK
;--------------------------------------------------------------------
GET_ERR:
JMP short GET_PARM_ERR
GET_PARA_FD:
;---------------------------------------------------- 89/07/24 ---
PAT0010:
PUSH DS
PUSH BX
PUSH ES
MOV DX,0000H
CALL READ_DISK
JNB PAT0030
PAT0020:
JMP short GET_PARM_ERR
PAT0030:
POP ES
POP BX
POP DS
MOV SI,BP
ADD SI,0BH
MOV CX,0013H
LEA DI,[BX.DP_BPB]
REPZ MOVSB
;----------------------------------------------- DOS5 91/04/01 -------
XOR AX,AX
MOV CX,3
REP STOSW
;---------------------------------------------------------------------
;--------------------------------------------------- 89/07/24 ---
Get_Parm_OK:
clc
Get_Parm_Ret:
ret
Get_Parm_ERR:
pop es
POP BX
POP DS
JMP Get_Parm_Ret
GetDeviceParameters endp
CHECK_PART:
PUSH CX
PUSH BX
PUSH AX
XOR CH,CH
MOV CL,CURDRV
MOV BX,OFFSET EXLPTBL+1
CHECK_LOOP:
MOV AL,BYTE PTR [BX-2]
CMP BYTE PTR [BX],AL ;CHECK DA/UA
JZ CHECK010
MOV PART_NUM,0
JMP short CHECK020
CHECK010:
INC PART_NUM
CHECK020:
LOOP CHECK_LOOP
POP AX
POP BX
POP CX
RET
READ_FAT:
MOV DX,1 ;FAT
READ_DISK: ; 89/07/24
PUSH ds
POP ES
MOV DI,OFFSET DSK_BUF2
MOV AL,CURDRV
MOV CX,1
;----------------------------------------------- DOS5 91/01/22 -------
MOV [START_SEC_H],0
;---------------------------------------------------------------------
CALL READ
RET
READ_ID:
CLC
RET
;----------------------------------------------- DOS5 91/04/01 -------
;;************************************************870815NEW
;;* *
;;* HARD DISK SENSE *
;;* *
;;* INPUT : NONE *
;;* OUTPUT: CF=0:NORMAL *
;;* AH HD CAPACITY *
;;* BX BYTES / SECTOR *
;;* DH TRACKS / CYLINDER *
;;* DL SECTORS / TRACK *
;;* CF=1:ERROR *
;;* *
;;************************************************
;SENSE_HD:
; MOV CX,5 ;RETRY COUNT
;SNSHD00:
; XOR BX,BX
; MOV AH,84H ;SET SENSE COMMAND
; MOV AL,CURDA ;SET DA/UA
; OR AL,CURUA
; INT 1BH ;EXECUTE SENSE COMMAND
; JNC SNSHD01 ;SKIP IF SENSE GOOD
; LOOP SNSHD00
; STC ;SET CARRY
; RET
;
;SNSHD01:
; OR BX,BX ;BYTE/SEC = 0 (OLD BIOS) ?
; JNZ SNSHD01?SKIP?N ;NO,
; MOV BX,256 ;BYTES/SECTOR
; MOV DL,33 ;SECTORS/TRACK
; MOV DH,4 ;IF CAPACITY >= 20(MB)
; CMP AH,3 ; THEN TRACKS/CYLINDER = 8
; JB SNSHD01?SKIP?N ; ELSE TRACKS/CYLINDER = 4
; MOV DH,8 ;
;SNSHD01?SKIP?N:
; CLC
; RET
;--------------------------------------------------------------------
PAGE
;
; SetDeviceParameters:
;
; Input: DS:DI points to BDS for drive
; ES:BX points to device parameter packet
;
SetDeviceParameters proc near
or word ptr ds:[di].BDS_Flags, fChanged_By_Format or fChanged
test byte ptr es:[bx].DP_SpecialFunctions, ONLY_SET_TRACKLAYOUT
jz short SetDevParm_1
jmp short SetTrackTable ; Originally TrackLayout
SetDevParm_1:
mov al, byte ptr es:[bx].DP_DeviceType
mov byte ptr ds:[di].BDS_FormFactor, al
mov ax, word ptr es:[bx].DP_Cylinders
mov word ptr ds:[di].BDS_cCyln, ax
mov ax, word ptr es:[bx].DP_DeviceAttributes
;----------------------------------------------- DOS5A 92/10/07 ------
;<patch BIOS50-P24>
db 3 dup (90h)
;---------------
; and ax,not fChangeline
;---------------------------------------------------------------------
Have_Change:
and ax,fNon_Removable or fChangeline
mov cx, word ptr ds:[di].BDS_Flags
and cx, not (fNon_Removable or fChangeline or GOOD_TRACKLAYOUT)
or ax, cx
mov word ptr ds:[di].BDS_Flags, ax
mov al, byte ptr es:[bx].DP_MediaType
mov mediaType, al
or word ptr ds:[di].BDS_Flags, SET_DASD_true
PUSH DS
PUSH DI
PUSH ES
PUSH BX
test byte ptr es:[bx].DP_SpecialFunctions, INSTALL_FAKE_BPB
jnz short InstallFakeBPB
test word ptr ds:[di].BDS_Flags, RETURN_FAKE_BPB
jz short InstallRecommendedBPB
and word ptr ds:[di].BDS_Flags, not RETURN_FAKE_BPB
jmp short DoneWithBPBstuff
InstallRecommendedBPB:
mov cx, size a_BPB
lea di, byte ptr [di].BDS_RBPB.BPB_BYTESPERSECTOR
jmp short CopyTheBPB
InstallFakeBPB:
mov cx, size A_BPB - 6 ; move 'smaller' BPB
lea di, byte ptr [di].BDS_BPB.BPB_BYTESPERSECTOR
CopyTheBPB:
lea si, byte ptr [bx].DP_BPB
push es
push ds
pop es
pop ds
rep movsb
DoneWithBPBstuff:
POP BX
POP ES
POP DI
POP DS
SetTrackTable:
mov cx, word ptr es:[bx].26H ; 89/07/24
mov sectorsPerTrack, cx
and word ptr ds:[di].BDS_Flags, not GOOD_TRACKLAYOUT
test byte ptr es:[bx].DP_SpecialFunctions, TRACKLAYOUT_IS_GOOD
jz UglyTrackLayout
or word ptr ds:[di].BDS_Flags, GOOD_TRACKLAYOUT
UglyTrackLayout:
;----------------------------------------------- DOS5A 92/08/14 ------
;<patch BIOS50-P29>
; cmp cx, MAX_SECTORS_CURR_SUP ; current maximum sec/trk
cmp cx, 40 ; current maximum sec/trk
;;;;;-----------------------------------------------------------------
;;;;; cmp cx, MAX_SECTORS_IN_TRACK
;---------------------------------------------------------------------
ja TooManySectorsPerTrack
jcxz SectorInfoSaved ; if no value don't copy table
push BX ; get ES:BX to point to sector
add BX,28H ;table in Device param. struct 89/07/24
push DI
mov DI, offset TrackTable + 2 ; DS:DI now points to sector id
; of the first track table entry
push AX ; preserve AX value
; For MAX_SECTORS_IN_TRACK
TrackLoop: ; DO:
mov AX, word ptr ES:[BX] ; get sector number
mov byte ptr [DI], AL ; save in track table
mov AX, word ptr ES:[BX]+2 ; get sector size
call SectorSizeToSectorIndex ; convert size to index number
mov byte ptr [DI]+1, AL ; save size in track table
add BX, size a_sectorTable ; advance pointers to next
add DI, size a_sectorTable ; entries
loopnz TrackLoop ; End FOR
pop AX ; restore the saved values
pop DI
pop BX
SectorInfoSaved:
clc
ret
TooManySectorsPerTrack:
mov al, 0cH
stc
ret
SetDeviceParameters endp
PAGE
;
; FormatTrack:
;
; Input: DS:DI points to BDS for drive
; ES:BX points to format packet
;
; Output:
; For status call:
; SpecialFunction byte set to:
; 0 - ROM support + legal combination
; 1 - No ROM support
; 2 - Illegal Combination
; Carry cleared.
;
; For format track:
; Carry set if error
;
FormatTrack proc near
cmp byte ptr ds:[di].BDS_FormFactor, DEV_HARDDISK
JB FORMATTRACK00
JMP SHORT DoVerifyTrack ; 89/07/24
FORMATTRACK00:
PUSH DS
PUSH DI
PUSH ES
PUSH BX
; Check to ensure correct disk is in drive
MOV CX,WORD PTR DS:[DI].BDS_BPB.BPB_SECTORSPERTRACK ; 89/07/24
MOV WORD PTR [PATCH1],CX ; 89/07/24
call CheckSingle ; 89/07/24
mov ax, word ptr es:[bx].FP_Cylinder
mov word ptr [CURTRK],ax
mov cx, word ptr es:[bx].FP_Head
mov byte ptr [CURHD],cl
mov ah,cl
; this next piece of code copies the correct head
; and cylinder numbers to the tracktable
push di ; preserve DI
;----------------------------------------------------- 89/07/24 ---
MOV BL,DS:[DI].BDS_FORMFACTOR
MOV BH,03H
CMP BL,04H
JZ TRACKFORMAT10
DEC BH
CMP BL,02H
JBE TRACKFORMAT10
DEC BH
DEC BH
TRACKFORMAT10:
;---------------------------------------------------- 89/07/24 ---
mov di, offset TrackTable
mov CX, SectorsPerTrack ; get number of sectors
jcxz EndSetUpTrackTable ; in nothing to do skip down
SetUpLoop:
;---------------------------------------------------- 89/07/24 ---
MOV BL,01H
SetUpLoop10:
mov [di], AX ; set head and track value
MOV [DI+02H],BX
INC BL
add di, 4 ; move to next entry
loopnz SetUpLoop10 ; loop if not done yet
;---------------------------------------------------- 89/07/24 ---
EndSetUpTrackTable:
pop di ; restore DI (BDS pointer)
mov cx, MAXERR ; Set up retry count
FormatRetry:
push cx
; set up registers for format call to TO_ROM
mov AX, word ptr SectorsPerTrack ; set number of sectors
mov COM1, ROMFormat
push ds ; set ES:BX to point to
pop es ; the track table
mov BP,OFFSET TRACKTABLE ; 89/07/24
mov [cursec],0
mov ax,ds:[di].BDS_BPB.BPB_BYTESPERSECTOR
; don't need to set CL on format
call to_rom
jnc FormatOk
call ResetDisk
pop cx
loop FormatRetry
; Format failed
CALL ERROR
POP BX
POP ES
POP DI
POP DS
ret
FormatOk:
pop cx ; clean up stack after bailing out
; of FormatRetry loop early
POP BX
POP ES
POP DI
POP DS
DoVerifyTrack:
call VerifyTrack ; Will reset DPT entries.
ret
FormatTrack endp
PAGE
;
; VerifyTrack:
;
; Input: DS:DI points to BDS for drive
; ES:BX points to verify packet
;
VerifyTrack proc near
mov COM1,ROMVERIFY
mov AX, word ptr es:[bx].VP_Cylinder
mov [curtrk], ax
mov AX, word ptr es:[bx].VP_Head
mov [curhd], al
;----------------------------------------------- DOS5 91/09/28 -------
xor ax,ax
;---------------
; MOV AX,1
;---------------------------------------------------------------------
MOV CX,DS:[DI].BDS_BPB.BPB_SECTORSPERTRACK
XOR BP,BP
MOV ES,BP
call TRACKIO
ret
VerifyTrack endp
;
; ReadTrack:
;
; Input: DS:DI points to BDS for drive
; ES:BX points to read packet
;
ReadTrack:
mov COM1,Romread
jmp short ReadWriteTrack
;
; WriteTrack:
;
; Input: DS:DI points to BDS for drive
; ES:BX points to write packet
;
WriteTrack:
mov COM1, ROMwrite
jmp short ReadWriteTrack
;
; ReadWriteTrack:
;
; Input:
; DS:DI points to BDS for drive
; ES:BX points to write packet
;
ReadWriteTrack proc near
mov ax, word ptr es:[bx].TRWP_Cylinder
mov [curtrk], ax
mov ax, word ptr es:[bx].TRWP_Head
mov [curhd], al
mov ax, word ptr es:[bx].TRWP_FirstSector
mov cx, word ptr es:[bx].TRWP_SectorsToReadWrite
les bx, es:[bx].TRWP_TransferAddress
MOV BP,BX
call TrackIO
ret
ReadWriteTrack endp
;
; TrackIO:
; Performs Track Read/Write/Verify
;
; Input:
; COM1 - 6 = Read
; 5 = Write
; ax - Index into track table of first sector to IO
; cx - number of sectors to IO
; es:BP - Transfer address
; ds:di - pointer to BDS
; curtrk - current cylinder
; curhd - current head
;
public trackio
TrackIO proc near
MOV WORD PTR [PATCH1],CX ; 89/07/24
Call CheckSingle
;
mov si, offset trackTable
shl ax, 1
shl ax, 1
add si, ax
mov dx, 1
test word ptr ds:[di].BDS_Flags, GOOD_TRACKLAYOUT
jz IOnextSector
xchg dx, cx
IOnextSector:
push cx
push dx
inc si
inc si
mov AL, byte ptr [si] ; get current sector value
mov [cursec], AL ; save cursec value
mov AL, byte ptr [si]+1 ; get sector size index
call SectorSizeIndexToSectorSize
push AX ; save number of bytes in sector
DoTheIO:
call To_ROM
; advance buffer pointer by adding sector size
JC IO_ERR
pop AX ; get number of bytes transfered
add BP, AX ; advance buffer pointer
pop dx
pop cx
loop IOnextSector
clc ; entries in DPT.
ret
IO_ERR:
;----------------------------------------------------- 89/07/28 ---
POP AX
MOV AH,BYTE PTR [PATCH3]
AND AH,0FH
CMP AH,05H
JZ PAT0050
MOV AH,0BH
JMP short PAT0060
PAT0050:
MOV AH,0AH
PAT0060:
;----------------------------------------------- DOS5 92/08/13 -------
;<patch BIOS50-P25>
extrn patch07a:near
jmp patch07a
;;;;;-----------------------------------------------------------------
;;;;; POP DX
;;;;; POP CX
;;;;;------------------------------------------------ 89/07/28 ---
;;;;; RET
;;;;;-----------------------------------------------------------------
TrackIO endp
;
;
public SectorSizeToSectorIndex
SectorSizeToSectorIndex proc near
and AH, 07h ; very simple error correction
mov AL, AH ; shift left 8 bits
cmp AL, 4 ; size 1024?
jnz SecToIndexRet ; no, then we are done
sub AL, 1 ; if 1024, adjust index to 3
SecToIndexRet:
ret
SectorSizeToSectorIndex endp
SectorSizeIndexToSectorSize proc near
; value in AH on entry is not important
push CX ; save CX value
mov CL, AL ; use index number as shift size
mov AX, 0080h ; set AX to 128
shl AX, CL ; shift by index to get proper value
pop CX ; restore CX value
ret
SectorSizeIndexToSectorSize endp
AGAIN:
call ResetDisk
dec bp ; decrement retry count
RET
ResetDisk:
CLC
ret
;
; On Entry - DS:DI - points to BDS for the drive
; ES:BX - points to TRKBUF
; AL - number of sectors
; CL - Sector number for verify
; On Exit - DS,DI,ES,BX remain unchanged.
; ax and flags are the results of the int 13
;
Public To_ROM
To_ROM:
PUSH DS
PUSH DI
PUSH ES
PUSH SI
MOV BX,AX
MOV AH,COM1
TEST CURDA,10H
JZ ROM005
OR AH,0D0H
ROM005:
;----------------------------------------------- DOS5A 92/12/01 ------
;<patch BIOS50-P30>
extrn patch144_8:near
call patch144_8
;---------------
; mov AL,CURDA ; set drive number
;---------------------------------------------------------------------
OR AL,CURUA
mov DH, [CURHD] ; set head number
mov CX, [CURTRK] ; set track number
MOV DL, [CURSEC] ; SET SECTOR NUMBER
PUSH AX
TEST CURDA,10H
JZ ROM020
MOV AX,WORD PTR DS:[DI].BDS_BPB.BPB_BYTESPERSECTOR
CMP AH,04H
JNZ ROM010
DEC AH
ROM010:
MOV CH,AH
JMP INTCALL
ROM020:
xor dx,dx
mov ax,cx
mul word ptr ds:[di].BDS_BPB.BPB_HEADS
xor cx,cx
mov cl,[hdnum]
add ax,cx
adc dx,0
mul ds:[di].BDS_BPB.BPB_SECTORSPERTRACK
xor cx,cx
mov cl,[cursec]
add ax,cx
adc dx,0
mov cx,ax
push cx
TEST CURDA, 20H
JNZ rom030
MOV SI,OFFSET HD_OFFSET
JMP short rom040
rom030:
MOV SI,OFFSET HDS_OFFSET
rom040:
XOR AH,AH
MOV AL,CURUA
MOV CL,4
SHL AX,CL
ADD SI,AX
CALL CHECK_PART
XOR AH,AH
MOV AL,PART_NUM
SHL AX,1
SHL AX,1
ADD SI,AX
pop cx
add cx,WORD PTR [SI]
;----------------------------------------------------- 89/07/28 ---
adc dx,0
PUSH AX
PUSH CX
PUSH DX
PUSH BX
CALL READ_ID
MOV AX,WORD PTR [DI].BDS_BPB.BPB_BYTESPERSECTOR
XOR DX,DX
DIV BX
MOV CX,AX
POP BX
MOV AX,BX
XOR DX,DX
MUL CX
MOV BX,AX
MOV AX,CX
POP DX
POP CX
PUSH BX
MOV BX,AX
;----------------------------------------------- DOS5 91/09/28 -------
mov ax,dx
mul bx
push ax ; save high word of sector#
;---------------------------------------------------------------------
MOV AX,CX
MUL BX
MOV CX,AX
;----------------------------------------------- DOS5 91/09/28 -------
pop bx ; restore high word of sector#
add dx,bx ; DX:CX has sector num
;---------------------------------------------------------------------
POP BX
POP AX
;----------------------------------------------------- 89/07/28 ---
INTCALL:
POP AX
TEST CURDA,10H
JnZ ROM050
;----------------------------------------------- DOS5 91/09/28 -------
and al,7fh
;---------------
; and ah,7fh
;---------------------------------------------------------------------
rom050:
;----------------------------------------------------- 89/07/28 ---
MOV WORD PTR[PATCH0],BX
MOV BYTE PTR[PATCH3],AH
PUSH AX
PUSH DX
MOV AX,BX
MUL WORD PTR [PATCH1]
MOV BX,AX
POP DX
POP AX
JB PAT0070
ROM55:
POP SI
ROM60:
POP ES
POP DI
POP DS
ret
;
PAT0070:
CMP AH,20H
;----------------------------------------------- DOS5 92/08/13 -------
;<patch BIOS50-P25>
public PAT0080, ROM55
extrn patch07b:near
jmp patch07b
db 90h
;;;;;-----------
;;;;; JZ PAT0080
;;;;; JMP ROM55
;---------------------------------------------------------------------
PAT0080:
MOV AH,BYTE PTR [PATCH3]
AND AH,0FH
CMP AH,05H
JZ PAT0090
JMP short WRITE_DMA
PAT0090:
READ_DMA:
PUSH DS
PUSH ES
PUSH SI
PUSH DI
PUSH CX
MOV CX,WORD PTR [PATCH0]
PUSH ES
POP DS
PUSH AX
MOV AX,0060H ;bios_data segment
MOV ES,AX
POP AX
MOV SI,BP
MOV DI,OFFSET DSK_BUF2
CLD
REPZ MOVSB
POP CX
POP DI
POP SI
POP ES
POP DS
MOV BX,WORD PTR [PATCH0]
PUSH ES
PUSH BP
PUSH DS
POP ES
MOV BP,OFFSET DSK_BUF2
MOV AH,BYTE PTR [PATCH3]
clc
POP BP
POP ES
JNB PAT0100
PAT0110:
POP SI
JMP ROM60
PAT0100:
DEC WORD PTR [PATCH1]
JZ PAT0110
CALL DMA_CALL
JMP READ_DMA
;
WRITE_DMA:
MOV BX,WORD PTR [PATCH0]
PUSH ES
PUSH BP
PUSH DS
POP ES
MOV BP,OFFSET DSK_BUF2
MOV AH,BYTE PTR [PATCH3]
clc
POP BP
POP ES
JNB PAT0120
JMP ROM55
PAT0120:
PUSH SI
PUSH DI
PUSH CX
MOV CX,WORD PTR [PATCH0]
MOV SI,OFFSET DSK_BUF2
MOV DI,BP
CLD
REPZ MOVSB
POP CX
POP DI
POP SI
DEC WORD PTR [PATCH1]
JNZ PAT0130
JMP ROM55
PAT0130:
CALL DMA_CALL
JMP WRITE_DMA
;
DMA_CALL:
MOV BX,[PATCH0]
SHR BX,1
SHR BX,1
SHR BX,1
SHR BX,1
MOV SI,ES
ADD BX,SI
MOV ES,BX
INC DL
RET
;----------------------------------------------------- 89/07/28 ---
;
PUBLIC IOCTL$GETOWN_CODE
IOCTL$GETOWN_CODE PROC FAR
IOCTL$GETOWN_CODE ENDP
CALL CNVDRV
MOV AL,CURDRV
call SetDrive
mov al,byte ptr [di].BDS_DriveNum ; Get physical drive number
push ax
mov ax,0060h ;bios_code segment
mov ds,ax
pop ax
mov di,word ptr Start_BDS
Own_Loop:
cmp byte ptr [di].BDS_DriveNum,al
jne GetNextBDS
test word ptr [di].BDS_flags,fI_Own_Physical
jnz Done_GetOwn
GetNextBDS:
mov bx,word ptr [di].BDS_link+2
mov di,word ptr [di].BDS_link
mov ds,bx
CMP DI,-1
JZ ERR_GETOWN
jmp short Own_Loop
Done_GetOwn:
JMP SHORT EXIT_OWN
ERR_GETOWN:
JMP ERR_EXIT
;
;
PUBLIC IOCTL$SETOWN_CODE
IOCTL$SETOWN_CODE PROC FAR
IOCTL$SETOWN_CODE ENDP
call CNVDRV
MOV AL,CURDRV
call SetDrive
mov byte ptr [fSetOwner],1 ; set flag for CheckSingle to
; look at.
call CheckSingle ; Set ownership of drive
mov byte ptr [fSetOwner],0 ; reset flag
EXIT_OWN:
xor cl,cl
test word ptr [di].BDS_flags,fI_Am_Mult
jz EXIT_NO_MULT
mov cl,byte ptr [di].BDS_DriveLet ; Get logical drive number
inc cl ; get it 1-based
EXIT_NO_MULT:
LDS BX,ds:[PtrSav]
mov byte ptr [BX].UNIT,CL
jmp EXIT
; Input:
; DS:DI pints to the BDS for the drive being checked.
;
; If there is a error the carry flag is set on return
;
; All registers are preserved.
CheckSingle:
push AX ; save affected registers
push BX
mov BX,word ptr ds:[di].BDS_flags
test bl,fNon_Removable ; if hard drive, cannot change disk
jnz SingleRet ; so return
; is there a drive sharing this
test bx,fI_Am_Mult ; physical drive?
jz SingleRet ; if not, then return
test bx,fI_Own_Physical ; does it own this physical drive?
jnz SingleRet ; if yes then return
mov al,ds:[di].BDS_DriveNum ; get physical drive number
push ds ; preserve pointer to current BDS
push di
;----------------------------------------------- DOS5 91/02/23 -------
mov ds,cs:[BDATA_SEG] ; Point to start of BDS linked list
; push cs
; pop ds ; Point to start of BDS linked list
;---------------------------------------------------------------------
mov di,offset Start_BDS
Scan_List:
mov bx,word ptr [di].BDS_link+2 ; go to next BDS
mov di,word ptr [di].BDS_link
mov ds,bx
cmp di,-1 ; end of list?
jz single_err_ret ; if so there must be an error
; same physical drive?
cmp byte ptr [di].BDS_DriveNum,al
jnz Scan_List ; no, keep looking
Check_Own: ; yes, check to see if owner
mov bx,word ptr [di].BDS_flags
test bl,fI_Own_Physical
jz Scan_List ; not owner, keep looking
xor bl,fI_Own_Physical ; yes owner reset ownership flag
mov word ptr ds:[di].BDS_flags,bx
pop di ; Restore pointer to current BDS
pop ds
xor bx,bx
or bl,fI_Own_Physical ; establish current BDS as owner
or word ptr [di].BDS_flags,bx
cmp byte ptr [fSetOwner], 1
jz SingleRet
Ignore_SDSB:
call EXCMSG ; ask user for correct disk
SingleRet:
pop BX ; restore registers
pop ax
ret ; return
Single_Err_Ret:
stc ; set carry flage to indicate error
pop di ; restore current BDS
pop ds
jmp short SingleRet
; Input:
; AL contains the logical drive number
; Output:
; DS:DI points to correct BDS if Carry is clear.
;
; All register execpt DS and DI are preserved
Public SetDrive
SetDrive:
push bx
push ax
mov ax,0060h ;bios_code segment
mov ds,ax
pop ax
; assume first BDS is in this segment
mov di,word ptr Start_BDS
Scan_Loop:
cmp byte ptr [di].BDS_DriveLet,al ; is this correct BDS?
je SetDrv ; yes, get out
mov bx,word ptr [di].BDS_link+2 ; no, go to next BDS
mov di,word ptr [di].BDS_link
mov ds,bx
cmp di,-1 ; at end of list?
jnz Scan_Loop ; no, keep looking
stc ; yes, indicate error set carry
SetDrv:
pop bx ; restore bx
ret ; return
;----------------------------------------------- DOS5 91/01/18 -------
; ==========================================================================
; get media id
; ==========================================================================
;
; FUNCTION: get the volume label,the system id and the serial number from
; the media that has the extended boot record.
; for the conventional media,this routine will return "unknown
; media type" error to dos.
;
; INPUT : DS:di -> bds table for this drive.
; ES:BX -> packet
;
; OUTPUT: the request packet filled with the information,if not carry.
; if carry set,then al contains the device driver error number
; that will be returned to dos.
; register DS,DX,AX,CX,DI,SI destroyed.
;
; SUBROUTINES TO BE CALLED:
; BootIo:NEAR
;
; LOGIC:
; to recognize the extended boot record,this logic will actually
; access the boot sector even if it is a hard disk.
; note:the valid extended bpb is recognized by looking at the mediabyte
; field of bpb and the extended boot signature.
;
; {
; get logical drive number from bds table;
; RW_SW = read operation;
; BootIo; /*get the media boot record into the buffer
; if (no error) then
; if (extended boot record) then
; { set volume label,volume serial number and system id
; of the request packet to those of the boot record;
; };
; else /*not an extended bpb */
; { set register al to "unknown media.." error code;
; set carry bit;
; };
; else
; ret; /*already error code is set in the register al
;
; ==========================================================================
GetMediaId PROC NEAR
ASSUME DS:Bios_Data,ES:NOTHING
; call ChangeLineChk
mov AL,[DI].BDS_DriveLet ; Logical drive number
mov RW_SW,0 ; Read operation
call BootIo ; Read boot sector into DSK_BUF2
jc IOCtl_If1
cmp DSK_BUF2.EXT_BOOT_BPB.BPB_MEDIADESCRIPTOR,0f0h
jb IOCtl_If2 ; brif not valid (0f0h - 0ffh)
cmp DSK_BUF2.EXT_BOOT_SIG,ext_boot_signature ; =29h
jnz IOCtl_If2 ; Extended boot record
les DI,[PtrSav] ; ES:di points to request header.
les DI,ES:[DI].GenericIOCtl_Packet
mov SI,OFFSET DSK_BUF2.EXT_BOOT_SERIAL
add DI,mi_serial
mov CX,SIZE EXT_BOOT_SERIAL+SIZE EXT_BOOT_VOL_LABEL+SIZE EXT_SYSTEM_ID
rep movsb ; Move frm Bios_Data into request packet
clc
ret
IOCtl_If2:
mov AL,7 ;Error_UnKnown_Media
stc
IOCtl_If1:
ret
GetMediaId ENDP
; ==========================================================================
; set media id
; ==========================================================================
; function: set the volume label, the system id and the serial number of
; the media that has the extended boot record.
; for the conventional media, this routine will return "unknown
; media.." error to dos.
; this routine will also set the corresponding informations in
; the bds table.
;
; input : DS:di -> bds table for this drive.
; ES:BX -> packet
;
; output: the extended boot record in the media will be set according to
; the request packet.
; if carry set, then al contains the device driver error number
; that will be returned to dos.
;
; subroutines to be called:
; BootIo:NEAR
;
; logic:
;
;
; {
; get drive_number from bds;
; RW_SW = "read operation";
; BootIo;
; if (no error) then
; if (extended boot record) then
; { set volume label,volume serial number and system id
; of the boot record to those of the request packet;
; RW_SW = "write operation";
; get drive number from bds;
; BootIo; /*write it back*/
; };
; else /*not an extended bpb */
; { set register al to "unknown media.." error code;
; set carry bit;
; ret; /*return back to caller */
; };
; else
; ret; /*already error code is set */
;
; ==========================================================================
SetMediaId PROC NEAR
ASSUME DS:Bios_Data,ES:NOTHING
; call ChangeLineChk
mov AL,[DI].BDS_DriveLet ; Logical drive number
mov DL,AL ; Save it for the time being.
mov RW_SW,0 ; Read operation
push DX ; Save drive number
call BootIo ; Read boot sec to Bios_Data:DSK_BUF2
pop DX ; Restore drive number
jc IOCtl_If6
; Valid? (0f0h-0ffh?)
cmp DSK_BUF2.EXT_BOOT_BPB.BPB_MEDIADESCRIPTOR,0f0h
jb IOCtl_If7 ; Brif not
cmp DSK_BUF2.EXT_BOOT_SIG,ext_boot_signature ; =41 (=29h)
jnz IOCtl_If7 ; Extended boot record
push DI ; Save BDS pointer
push ES
push DS ; Point ES To boot record
pop ES
mov DI,OFFSET DSK_BUF2.EXT_BOOT_SERIAL
lds SI,[PtrSav] ; DS:si points to request header.
ASSUME DS:NOTHING
lds SI,DS:[SI].GenericIOCtl_Packet
add SI,mi_serial
mov CX,SIZE EXT_BOOT_SERIAL+SIZE EXT_BOOT_VOL_LABEL+SIZE EXT_SYSTEM_ID
rep movsb
push ES ; point ds back to Bios_Data
pop DS
; if dhigh ; cas - only disable for binary compare
ASSUME DS:Bios_Data
; endif
pop ES
pop DI ;restore bds pointer
call Mov_Media_Ids ; update the bds media id info.
mov AL,DL ; set drive number for BootIo
mov RW_SW,1 ; Write operation
call BootIo ; write it back.
; mov [Tim_Drv],-1 ; make sure chk_media check the driver
ret ; return with error code from BootIo
IOCtl_If7:
mov AL,7 ;Error_UnKnown_Media
stc
IOCtl_If6:
ret
SetMediaId ENDP
; ==========================================================================
; BootIo
; ==========================================================================
;
; function: read/write the boot record into boot sector.
;
; input :
; al=logical drive number
; RW_SW = operation (read/write)
;
; output: for read operation,the boot record of the drive specified in bds
; be read into the DSK_BUF2 buffer.
; for write operation,the DSK_BUF2 buffer image will be written
; to the drive specified in bds.
; if carry set,then al contains the device driver error number
; that will be returned to dos.
; AX,CX,DX register destroyed.
; if carry set,then al will contain the error code from READ/WRITE.
;
; subroutines to be called:
; READ/WRITE:NEAR
;
; logic:
;
; {
; first_sector = 0; /*logical sector 0 is the boot sector */
; sectorcount = 1; /*read 1 sector only */
; buffer = DSK_BUF2; /*read it into the DSK_BUF2 buffer */
; call READ/WRITE (drive_number,first_sector,sectorcount,buffer);
; }
; ==========================================================================
BootIo PROC NEAR
ASSUME DS:Bios_Data
push ES
push DI
push BX
push DS
pop ES ; Point ES: to Bios_Data
; Call DiskIO to read/write the boot sec. The parameters which
; need to be initialized for this subroutine out here are
; - Transfer address to Bios_Data:DSK_BUF2
; - Low sector needs to be initalized to 0. this is a reg. param
; - Hi sector in [Start_Sec_H] needs to be initialised to 0.
; - Number of sectors <-- 1
mov DI,OFFSET DSK_BUF2 ; ES:di -> transfer address
xor DX,DX ; First sector (h) -> 0
mov [Start_Sec_H],DX ; Start sector (h) -> 0
mov CX,1 ; One sector
cmp RW_SW,1
je BootIoWrite
call READ
jmp SHORT BootIoEnd
BootIoWrite:
call WRITE
BootIoend:
pop BX
pop DI
pop ES
ret
BootIo ENDP
; ==========================================================================
; Move Media Ids
; ==========================================================================
;
; function: copy the boot_serial number, volume id, and filesystem id from
; the ***extended boot record*** in ds:DSK_BUF2 to the bds table
; pointed by es:di.
;
; input: ds:di -> bds
; ds:DSK_BUF2 = valid extended boot record.
;
; output: vol_serial, bds_volid and bds_system_id in bds are set according
; to the boot record information.
; carry flag set if not an extended bpb.
; all registers saved except the flag.
; ==========================================================================
PUBLIC MOV_MEDIA_IDS
mov_media_ids proc near
assume ds:Bios_Data,es:nothing
cmp DSK_BUF2.EXT_BOOT_SIG,ext_boot_signature ; = 41
jne mmi_not_ext
push cx
mov cx,word ptr DSK_BUF2.EXT_BOOT_SERIAL
mov word ptr [di].bds_vol_serial,cx
mov cx,word ptr DSK_BUF2.EXT_BOOT_SERIAL+2
mov word ptr [di].bds_vol_serial+2,cx
push di
push si
PUSH ES
PUSH DS
POP ES
mov cx,size EXT_BOOT_VOL_LABEL
mov si,offset DSK_BUF2.EXT_BOOT_VOL_LABEL
add di,bds_volid
rep movsb
mov cx,size EXT_SYSTEM_ID ; =8
mov si,offset DSK_BUF2.EXT_SYSTEM_ID
add di,bds_filesys_id-bds_volid-size EXT_BOOT_VOL_LABEL
rep movsb
POP ES
pop si
pop di
pop cx
clc
ret
mmi_not_ext:
stc
ret
mov_media_ids endp
; ==========================================================================
; GetAccessFlag
; ==========================================================================
;
; FUNCTION: get the status of UNFORMATTED_MEDIA bit of flags in bds table
;
; INPUT :
; DS:di -> bds table
; ES:BX -> packet
;
; OUTPUT: a_DiskAccess_Control.dac_access_flag = 0 if disk i/o not allowed.
; = 1 if disk i/o allowed.
; ==========================================================================
GetAccessFlag PROC
ASSUME DS:Bios_Data,ES:NOTHING
mov AL,0 ; Assume result is unformatted
test [DI].BDS_Flags,UNFORMATTED_MEDIA ; Is it unformtted media?
jnz GafDone ; Done if unformatted
inc al ; Return true for formatted
GafDone:
mov ES:[BX].dac_access_flag,AL
clc
ret
GetAccessFlag ENDP
; ==========================================================================
; SetAccessFlag
; ==========================================================================
;
; function: set/reset the UNFORMATTED_MEDIA bit of flags in bds table
;
; input :
; DS:di -> bds table
; ES:BX -> packet
;
; output: unformtted_media bit modified according to the user request
; ==========================================================================
SetAccessFlag PROC
and [DI].BDS_Flags,NOT UNFORMATTED_MEDIA
cmp ES:[BX].DAC_Access_Flag,0
jne saf_Done
or [DI].BDS_Flags,UNFORMATTED_MEDIA
saf_Done:
clc
ret
SetAccessFlag ENDP
; ==========================================================================
; Ioctl_Support_Query
; ==========================================================================
;
; New device command which was added in DOS 5.00 to allow a query of a
; specific specific GENERIC IOCtl to see if it is supported. Bit 7 in the
; device attributes specifies if this function is supported.
;
; ==========================================================================
PUBLIC IOCTL_SUPPORT_QUERY_CODE
IOCTL_SUPPORT_QUERY_CODE PROC FAR
IOCTL_SUPPORT_QUERY_CODE ENDP
ASSUME DS:Bios_Data,ES:NOTHING
push ES
les BX,[PtrSav] ; ES:BX Points to request header.
mov AX,WORD PTR ES:[BX].MajorFunction ; AL == Major, AH == Minor
cmp AL,IOC_DC ; See if major code is 8
jne NoSupport
push CS ; ES == Code segment
pop ES
ASSUME ES:Bios_Code
mov CX,IOC_DC_TABLE_LEN
mov DI,OFFSET IOC_DC_Table ; ES:DI -> Major table
xchg AL,AH ; Put minor code in AL
repne scasb ; Scan for minor code in AL
jne NoSupport ; Was it found
mov AX,100h ; Signal ioctl is supported
jmp SHORT IoctlSupExit
IoctlSupExit:
pop ES
JMP EXIT
NoSupport:
pop ES
jmp CMD_ERR
; ==========================================================================
; GetMediaSenseStatus
; ==========================================================================
;
; FUNCTION: Will return the type of diskette media in the specified DOS
; diskette drive and whether the media is the default type
; for that drive. (default type means the max size for that
; drive)
;
; INPUT : DS:DI -> BDS table
; ES:BX -> packet
;
; OUTPUT: If carry clear
; DS:BX -> Updated IOCtlPacket
;
; Special Function at offset 0:
; 0 - Media detected is not default type
; 1 - Media detected is default type
;
; Device Type at offset 1:
; 0 - 320 / 360K
; 1 - 2HD(15)
; 2 - 640 / 720K
; 3 - 256K
; 4 - 1M
; 8 - 3.5" MO
;
; Error Codes returned in AX if carry set:
;
; 8102 - Drive not ready - No disk is in the drive.
; 8107 - Unknown media type - Drive doesn't support this function or
; the media is really unkown, any error
; other than "media not present"
;
; ==========================================================================
SenseMediaType PROC
ASSUME DS:Bios_Data,ES:NOTHING
mov WORD PTR ES:[BX],00 ; Initialize the 2 packet bytes
;----------------------------------------------- DOS5 91/01/10 -------
MOV AL,3
CMP BYTE PTR [DI].BDS_BPB.BPB_MEDIADESCRIPTOR,00H
JE GOTMEDIATYPE
MOV AL,4
CMP BYTE PTR [DI].BDS_BPB.BPB_MEDIADESCRIPTOR,01H
JE GOTMEDIATYPE
MOV AL,1
CMP BYTE PTR [DI].BDS_BPB.BPB_MEDIADESCRIPTOR,02H
JE GOTMEDIATYPE
MOV AL,0
CMP BYTE PTR [DI].BDS_BPB.BPB_MEDIADESCRIPTOR,0FEH
JE GOTMEDIATYPE
MOV AL,0
CMP BYTE PTR [DI].BDS_BPB.BPB_MEDIADESCRIPTOR,0FCH
JE GOTMEDIATYPE
MOV AL,0
CMP BYTE PTR [DI].BDS_BPB.BPB_MEDIADESCRIPTOR,0FFH
JE GOTMEDIATYPE
MOV AL,0
CMP BYTE PTR [DI].BDS_BPB.BPB_MEDIADESCRIPTOR,0FDH
JE GOTMEDIATYPE
MOV AL,2
CMP BYTE PTR [DI].BDS_BPB.BPB_MEDIADESCRIPTOR,0FBH
JE GOTMEDIATYPE
MOV AL,2
CMP BYTE PTR [DI].BDS_BPB.BPB_MEDIADESCRIPTOR,0F9H
JE GOTMEDIATYPE
;----------------------------------------------- DOS5 91/08/00 -------
MOV AL,8
CMP BYTE PTR [DI].BDS_BPB.BPB_MEDIADESCRIPTOR,0F0H
;----------------------------------------------- DOS5A 92/12/01 ------
;<patch BIOS50-P30>
extrn patch144_5:near
public GOTMEDIATYPE,UNKNOWNMEDIATYPE
jmp patch144_5
db 90h
;---------------
; JE GOTMEDIATYPE
;---------------------------------------------------------------------
; JMP SHORT UNKNOWNMEDIATYPE
;-----------------------------------------------------------------------
;---------------
; mov DL,ES:[DI].BDS_DriveNum ; Get int 13h drive number from BDS
; xor DH,DH ; DX == physical drive number
; mov AH,20h ; Get Media Type function
; int 13h ; If no carry media type in AL
; jc MediaSenseErr ; ELSE error code in AH
;
; inc BYTE PTR DS:[BX] ; Signal media type is default (bit 1)
;
;DetermineMediaType:
; dec AL
; cmp AL,2 ; Chk for 720K ie: (3-1) = 2
; je GotMediaType
;
; add AL,4
; cmp AL,7 ; Chk for 1.44M ie: (4-1+4) = 7
; je GotMediaType
;
; cmp AL,9 ; Chk for 2.88M ie: (6-1+4) = 9
; jne UnknownMediaType ; Just didn't recognize media type
;----------------------------------------------------------------------
GotMediaType:
mov ES:[BX+1],AL ; Save the return value
clc ; Signal success
ret
; ; We come here if carry was set after the int 13h call.
; ; Before we process the error we need to see if it was
; ; a real error or just that the media type is not the
; ; default for the type of drive but was readily identified.
;
;MediaSenseErr:
; cmp AH,32h ; See if not default media erro
; je DetermineMediaType ; Not really an error
;
; mov AL,2 ; Now assume drive not ready
; cmp AH,31h ; See if media was present
; je SenseErrExit ; Return drive not ready
UnknownMediaType:
mov AL,7 ; Just don't know the media type
SenseErrExit:
mov AH,81h ; Signal error return
stc
ret
SenseMediaType ENDP
;---------------------------------------------------------------------
IF BRANCH ;----------------------------------------------------------
PAGE
;************************************************ 850507
;* *
;* B4670 SUBROUTINES *
;* *
;************************************************
HARDBPB:
;-------
PUSH ES ;850516
PUSH DS ;850516
MOV AX,CS ;850516
MOV DS,AX ;850516
MOV ES,AX ;850516
;
; HERE, MAKE BPB IMAGE FOR CURRENT DRIVE
;
CALL SYS_READ ;LOAD SYSTEM COMMON AREA
JC HARDEXT ;SKIP IF IO-ERROR
;
; READING OF COMMON AREA IS GOOD
;
MOV AL,[CURUA]
OR AL,80H
CALL FINDDRV ;ONLY X2 FORMATTED
MOV BL,[CURUA] ;850505
AND BX,0007H ;850505
PUSH BX ;850505
SHL BX,1 ;850505
SHL BX,1 ;850505
PUSH BX ;850505
ADD BX,OFFSET VT_OFFSET ;850505
MOV [SVPTR1],BX ;850505
POP BX ;850505
ADD BX,OFFSET VT_LAST ;850505
MOV [SVPTR2],BX ;850505
POP BX ;850505
MOV AX,13 ;850505
MUL BL ;850505
ADD AX,OFFSET VBPB ;850505
MOV [SVPTR],AX ;850505
;
; ARRANGE THOSE INFORMATION
;
CALL SYS_ARRY
;
CALL CHECK_X2SW ;850505
JZ HBPB_X2ADJ ;850505
CALL SYS_ARRY_ADJ
HBPB_X2ADJ: ;850505
;-------86/09/10------------------------;
PUSH DX
PUSH AX
PUSH CX
PUSH BX
MOV BX,OFFSET VT_LAST
MOV CX,4
MOV AX,[BX]
MOV DX,2[BX]
DIV CX
MOV [BX],AX
MOV 2[BX],DX
POP BX
POP CX
POP AX
POP DX
;-------86/09/10------------------------;
MOV AH,84H ;850505
MOV AL,[CURUA] ;850505
INT 1BH ;850505 (SENSE COM'D)
MOV SI,AX ;850505
AND SI,0007H ;850505
MOV [SI.VTPC],DH ;850505
MOV [SI.VSPT],DL ;850505
SHL SI,1 ;850505
MOV [SI.VBPS],BX ;850505
MOV [SI.VCPV],CX ;850505
CLC
HARDEXT:
POP DS ;850516
POP ES ;850516
MOV AL,-1
RET
;
; HERE, READ SYSTEM COMMON AREA HARD DISK
;
; CF:0-NORMAL READ/CF:1-FAIL TO READ
;
SYS_READ:
MOV CX,10
SYS_READ001:
MOV AX,8400H ;SET SENSE COMMAND AND DA/UA
OR AL,[CURUA] ;MAKE UA
INT 1BH ;EXECUTE SENSE COMMAND
JNC SYS_READ01 ;SKIP IF SENSE GOOD
LOOP SYS_READ001
JMP SYS_READ20 ;SKIP IF SENSE ERROR
SYS_READ01:
INC AH
AND AH,07H
MOV CL,AH
SHL AH,1
SHL AH,1 ;(AH+1)*4
ADD AH,CL ;(AH+1)*5
MOV HD_CAP,AH ;SAVE IT FOR X1-FORMATTED
MOV HD_SPT,DL ;SET NUMBER OF SECTOR PER TRACK
MOV HD_HED,DH ;SET NUMBER OF HAED PER CYLINDER
MOV HD_LNG,BX ;SET BYTE PER SECTOR
MOV BP,OFFSET HARD_WORK ;SET BUFFER ADDR
PUSH DS
POP ES
XOR CX,CX
XOR DX,DX ;ID_SEC=(00,00)
MOV RTRY_CNT,3 ;SET RETRY TIMES
MOV AL,[CURUA] ;
SYS_READ02:
MOV AH,06H ;SET READ COMMAND
INT 1BH
JNC SYS_READ04 ;SKIP IF GOOD
DEC RTRY_CNT
JZ SYS_READX1 ;CAN'T READ IT
CALL RCBL
JMP SHORT SYS_READ02 ;GO TO RETRY
;
; FIRST CHECK IF X2-FORMATTED
;
SYS_READ04:
MOV CX,2 ;SET COMPARE LENGTH
MOV SI,OFFSET HARD_WORK-2
ADD SI,HD_LNG
MOV DI,OFFSET CHR_X2
CLD
REPE CMPSB ;ID=55AAH ?
JNE SYS_READX1 ;SKIP IF NOT FOUND X2-ID
PUSH DI ;850505
CALL GET_SW ;850505 GET SW ADDRESS
MOV BYTE PTR [DI],-1 ;850505
POP DI ;850505
SYS_READ08:
MOV CX,1 ;MNGSEC=(00,01)
MOV RTRY_CNT,3 ;SET RETRY COUNTER
MOV AL,[CURUA] ;
;
; AX..READ/(DA.UA)
; BX..BYTE PER SECTOR
; DX/CX..NUMBER OF SECTOR(AT MANAGEMENT ZONE)
; ES/BP..BUFFER OF MANAGEMENT
;
SYS_READ10:
MOV AH,06H ;SET READ COMAND
INT 1BH
JNC SYS_REXIT ;EXIT IF GOOD
DEC RTRY_CNT
JZ SYS_READ20 ;HARD #0 DOWN
CALL RCBL ;RECALIBLATE COMMAND
JMP SYS_READ10
SYS_READ20:
STC ;SET ERROR CARRY
SYS_REXIT:
RET
;
; AX..READ/(DA.UA)
; BX..BYTE PER SECTOR
; DX/CX..NUMBER OF SECTOR(AT X1-MANAGEMENT ZONE)
; ES/BP..BUFFER OF MANAGENEBT
;
SYS_READX1:
MOV CX,2 ;SET NUMBER OF SECTOR(AT X1-MNG)
MOV RTRY_CNT,3 ;SET RETRY COUNTER
MOV AL,[CURUA] ;
SYS_READX1_10:
MOV AH,06H ;SET READ COMMAND
INT 1BH
JNC SYS_READX1_20
DEC RTRY_CNT
JZ SYS_READX1_15
CALL RCBL
JMP SHORT SYS_READX1_10 ;GO TO RETRY
SYS_READX1_15:
CMP CX,3
JAE SYS_READ20 ;NO HOPE ..TREAT AS NOT-CONNECTTED
INC CX
MOV RTRY_CNT,3
JMP SHORT SYS_READX1_10 ;READ RESERVED SECTOR
;
; CHECK IF IT IS X1-FORMATTED
;
SYS_READX1_20:
PUSH CX
MOV CX,4
MOV SI,OFFSET HARD_WORK
MOV DI,OFFSET CHR_VOL1 ;CHECK X1-ID
CLD
REPE CMPSB
POP CX
JE SYS_REXIT ;TREAT AS X1-FORMATTED
CMP CX,3
JAE SYS_READ20
JMP SHORT SYS_READX1_15
RET
BOOT_ID EQU 0 ;BOOT IDENTIFICATION
SYS_ID EQU 1 ;SYSTEM IDENTIFICATION
IPL_ADR EQU 4 ;ADDR OF IPL
LV_STA EQU 8 ;START ADDR OF LOGICAL VOLUME
LV_ENA EQU 12 ;END ADDR OF LOGICAL VOLUME
;
; FIND SELF NUMBER
;
FINDDRV:
CMP BT_TYP,AL
JNE FINDEXT
CALL CHECK_X2SW ;850505
JZ FINDEXT
MOV AL,SV_SELECT
AND AL,0FH
OR AL,80H
PUSH BP
PUSH BX
MOV CX,-1
XOR BX,BX
FIND10:
CMP BX,HD_LNG
JAE FIND40
CMP ES:BYTE PTR SYS_ID[BP],0 ;END OF AREA
JE FIND40
CMP ES:BYTE PTR SYS_ID[BP],81H ;MSDOS ?
JNE FIND20
INC CX
CMP ES:BYTE PTR BOOT_ID[BP],AL ;FIND ITSELF ?
JE FIND40
FIND20:
ADD BP,32
ADD BX,32
JMP SHORT FIND10
FIND40:
MOV SV_RDRV,CL ;SAVE IT
POP BX
POP BP
FINDEXT:
RET
RET
;
; HERE, ARRANGE THOSE INFORMATION
;
SYS_ARRY:
CALL CHECK_X2SW ;850505
JNZ SYS_ARRY_02 ;SKIP IF X2-FORMATTED
JMP SYS_ARRY_X1
;
; ARRANGE MNG-INF FOR X2-FORMATTED
;
SYS_ARRY_02:
PUSH BX
XOR BX,BX ;CLEAR OFFSET
SYS_ARRY_10:
CMP BX,HD_LNG ;END OF SECTOR
JAE SYS_ARRY_EXIT ;SKIP IF SO
CMP ES:BYTE PTR SYS_ID[BP],0 ;END OF AREA
JE SYS_ARRY_EXIT ;EXIT IF NO USING FIELD
CMP ES:BYTE PTR SYS_ID[BP],81H ;MS_DOS FIELD
JNE SYS_ARRY_POP ;SKIP IF NO MSDOS
PUSH BX
CALL SYS_NUC
POP BX
SYS_ARRY_POP:
ADD BX,32
ADD BP,32
JMP SHORT SYS_ARRY_10
SYS_ARRY_EXIT:
POP BX
RET
;
; ARRANGE MNG-INF FOR X1-FORMATTED
;
SYS_ARRY_X1:
MOV SI,OFFSET HARD_WORK+31
LODSB ;GET UOA
MOV SI,OFFSET HARD_WORK+40
CMP AL,-1 ;SINGLE OS MODE ?
JNE SRCH_P ;SEARCH PARTITION
LODSB ;GET PARTITION ID
CMP AL,0DDH ;MSDOS AREA ?
JNE BAD_VOL ;SKIP IF BAD-VOLUME
MOV DL,HD_CAP ;SET VOLUME CAPACITY
MOV DH,1 ;SET FIRST PARTITION NUM
JMP SHORT ALL_DOS
BAD_VOL:
RET
SRCH_P:
MOV DD_FLG,0
MOV DL,0 ;CLEAR CAPACITY REG
MOV CL,1 ;SET FIRST PARTITION NUM
NXT_SRCH:
LODSB ;GET PARTITION ID
CMP AL,0DDH ;MSDOS AREA
JNE G_NXT_P
OR DL,DL ;FIRST AREA
JNZ NOT_FST
NOT DD_FLG
MOV DH,CL ;SAVE FIRST PARTITION NUM
NOT_FST:
INC DL
G_NXT_P:
ADD SI,7 ;NEXT PARTITION AREA
INC CL ;NEXT PARTITION ID
CMP CL,HD_CAP
JBE NXT_SRCH
MOV HD_CAP,DL ;UPDATE CAPACITY
OR DL,DL ;NO MSDOS-AREA ?
JZ BAD_VOL ;SKIP IF SO
ALL_DOS:
MOV SI,SVPTR2 ;GET LAST POINTER ADDR
MOV CX,DX
PUSH CX
XOR AX,AX
MOV AL,DL
MOV CX,990
MUL CX
SHL AX,1
RCL DX,1 ;CONVERT 1024(BPS) TO 512(BPS)
SHL AX,1
RCL DX,1 ;512 => 256
;
; HD_LAST
;
MOV [SI],AX ;SAVE LOWER
MOV [SI+2],DX ;SAVE HIGER
POP CX
XOR AX,AX
MOV AL,CH
DEC AL
MOV CX,120*33 ;MB=120*33 SECTOR
MUL CX
ADD AX,33
ADC DX,0
MOV SI,SVPTR1
;
; HD_OFFSET
;
MOV [SI],AX ;SAVE LOWER
MOV [SI+2],DX ;SAVE HIGER
;
; COPY BPB IMAGE
;
MOV BP,OFFSET HARD_WORK ;SET BUFFER ADDR
MOV BX,HD_LNG
XOR DX,DX
MOV CX,4 ;SET START WORKING SECTOR
MOV RTRY_CNT,3
MOV AL,[CURUA] ;
R_WORK:
MOV AH,06H ;SET READ COMMAND
INT 1BH
JNC CHK_SUB_L
DEC RTRY_CNT
JZ NXT_R_WORK
CALL RCBL
JMP SHORT R_WORK
CHK_SUB_L:
MOV SI,BP ;SET SOURCE ADDR
MOV DI,OFFSET HD_LBL
PUSH CX
MOV CX,15
CLD
REPE CMPSB
POP CX
JE SUC_HD
NXT_R_WORK:
INC CX
MOV RTRY_CNT,3
CMP CX,33
JB R_WORK
RET
;
; FOUND BPB INCLUDING SECTOR
;
SUC_HD:
MOV SI,OFFSET HARD_WORK+10H
MOV DI,SVPTR
MOV CX,13
PUSH DI
REP MOVSB
POP DI
MOV AL,HD_CAP ;GET CURRENT DRIVE CAPACITY
MOV WORD PTR [DI+11],1 ;1 SPF
CMP AL,6
JB SUC_HD_END
INC WORD PTR [DI+11] ;2 SPF
CMP AL,12
JB SUC_HD_END
INC WORD PTR [DI+11] ;3 SPF
CMP AL,17
JB SUC_HD_END
INC WORD PTR [DI+11] ;4 SPF
SUC_HD_END:
;---------------------------------- 850507
ADD AL,16 ;
MOV [DI+BPB_MDA],AL ;SET MEDIA-DISCRIPTOR
;---------------------------------- 850507
MOV AX,[DI+3] ;GET RESERVED SECTOR
MOV WORD PTR [DI+3],1 ;SET 1 TO FAKE AS IBM
DEC AX
SHL AX,1
SHL AX,1 ;CONVERT 1024 TO 256
MOV SI,SVPTR1
ADD [SI],AX
ADC WORD PTR [SI+2],0
RET
RET
SYS_ARRY_ADJ:
PUSH AX
PUSH BX
PUSH CX
PUSH SI
PUSH DI
SYS_ARRY_ADJ10:
MOV BP,SVPTR1 ;GET CURRENT OFFSET
MOV SI,CS:[BP] ;GET LOWER DATA
MOV DI,CS:2[BP] ;GET HIGH DATA
MOV BP,SVPTR2 ;GET CURRENT LAST
MOV AX,CS:[BP] ;GET LOWER DATA
MOV BX,CS:2[BP] ;GET HIGH DATA
;
; [BX.AX] =[BX.AX]-[DI.SI]
; 32 BITS SUBTRACT
;
NOT DI
NOT SI
INC SI
ADC DI,0
ADD BX,DI ;ADD HIGH
ADD AX,SI ;ADD LOWER
ADC BX,0
MOV CS:[BP],AX ;SAVE LOWER RESULT
MOV CS:2[BP],BX ;SAVE HIGH RESULT
POP DI
POP SI
POP CX
POP BX
POP AX
RET
RET
;
; HERE, NUCRIOUS THIS PROCESS
;
SYS_NUC:
MOV CX,IPL_ADR+2[BP] ;SET IPL CYLNDER
MOV DH,IPL_ADR+1[BP] ;SET IPL HAED
MOV DL,IPL_ADR[BP] ;SET IPL SECTOR
PUSH BP ;SAVE BUFFER ADDR
MOV BP,OFFSET IPL_BUF ;SET WORK BUUFER ADDR OF IPL
MOV BX,HD_LNG ;256/512
MOV RTRY_CNT,10 ;SET RETRY TIMES
MOV ERROR_FLG,00
SYS_NUC10:
MOV AX,0680H ;SET COMMAND AND DA/UA
OR AL,[CURUA] ;
INT 1BH
JNC SYS_NUC30 ;SKIP IF GOOD
DEC RTRY_CNT
JZ SYS_NUC20
CALL RCBL ;EXECUTE RECALIBLATE
JMP SYS_NUC10
;
SYS_NUC20:
;
; CAN'T READ IPL CODE AND BPB IMAGE..
;
POP BP
RET
SYS_NUC30:
MOV SI,BP ;SET BUFFER ADDR
ADD SI,11 ;POINT BPB IMAGE
MOV DI,SVPTR ;GET SETTING ADDR OF BPB
PUSH DS
POP ES ;ES <- DS
MOV CX,13 ;SET BPB LENGTH
REP MOVSB
SYS_NUC50:
POP BP ;RESTORE MANAGEMENT BUFFER
;
; IPL-ADR[BP]+HD_SPT*{(IPL_ADR+1[BP]) + (IPL_ADR[BP]*HD_HED)}
;
; MEANS RELATIVE SECTOR OF IPL ADDR
;
MOV CL,HD_HED ;SET NUMBER OF HEAD PER CYLINDER
XOR CH,CH ;CLEAR CH
MOV AX,IPL_ADR+2[BP] ;GET IPL CYLINDER NUMBER
MUL CX ;[DX.AX]=AX*CX
MOV CL,IPL_ADR+1[BP] ;GET IPL HEAD NUMBER
XOR CH,CH ;CLEAR CH
ADD AX,CX
MOV CL,HD_SPT ;SET NUMBER OF SECTOR PER TRACK
XOR CH,CH
MUL CX
MOV CL,IPL_ADR[BP] ;GET IPL SECTOR NUMBER
XOR CH,CH
ADD AX,CX
ADC DX,0
MOV SI,SVPTR1 ;GET STORE FIELD ADDR
CMP HD_LNG,256
JE SKIP_256 ;SKIP IF BPS=256
;
; CONVERT 512 TO 256
;
SHL AX,1
RCL DX,1
SKIP_256:
MOV [SI],AX
MOV [SI+2],DX ;SAVE OFFSET
;
; LV_ENA[BP] + HD_SPT*{(LV_ENA+1[BP]) + (LV_ENA+2[BP]*HD_HED)}
;
; MEANS RELATIVE SECTOR OF LAST AREA
;
MOV CL,HD_HED
XOR CH,CH
MOV AX,LV_ENA+2[BP] ;GET LAST SECTOR NUMBER
MUL CX
MOV CL,LV_ENA+1[BP] ;GET LAST HEAD NUMBER
XOR CH,CH
ADD AX,CX
MOV CL,HD_SPT
XOR CH,CH
MUL CX
MOV CL,LV_ENA[BP]
XOR CH,CH
ADD AX,CX
ADC DX,0
;
CMP HD_LNG,256
JE SKIP1_256
SHL AX,1
RCL DX,1 ;CONVERT 512 TO 256
SKIP1_256:
SYS_NUC60:
MOV SI,SVPTR2
MOV [SI],AX
MOV [SI+2],DX
RET
RET
SET_VBPB:
;--------
; CALLED FROM (GET_BPB) 85/05/17
PUSH DS
PUSH ES
MOV BX,CS
MOV DS,BX
MOV ES,BX
MOV BL,[FSTDRV] ;FIRST V-DRIVE NO.
XOR BH,BH
MOV AL,[CURUA] ;UNIT
AND AL,03H
ADD BL,AL
SHL BX,1
MOV AL,BYTE PTR [BX.EXLPTBL+1] ;GET DA/UA
PUSH AX
AND AL,0F0H
MOV CH,3
CMP AL,90H ;8" TYPE ?
JE SET_VBPB10 ;YES,
MOV CH,2
CMP AL,80H
JB SET_VBPB10 ;JUMP IF 5" TYPE
POP AX
JMP SET_VBPB_DONE ;HD TYPE
SET_VBPB10:
POP AX
XOR CL,CL ;CYL=0
XOR DH,DH ;HED=0
MOV DL,2 ;SEC=2 (FAT SEC)
MOV BP,OFFSET HARD_WORK
MOV [RTRY_CNT],3
SETVB_LOOP:
MOV AH,0D6H ;"READ" COMMAND
INT 1BH ;READ FAT SECTOR
JNC SETVB_OK ;JUMP IF NO-ERROR
DEC [RTRY_CNT]
JNZ SETVB_LOOP ;RETRY
MOV AL,-1
JMP SET_VBPB_DON0
SETVB_OK:
MOV AH,BYTE PTR [HARD_WORK] ;GET FAT-ID
CALL SUBVTB
SET_VBPB_DONE:
MOV AL,0
SET_VBPB_DON0:
POP ES
POP DS
RET
SUBVTB:
; ON EXIT (SI)=TARGET BPB ADDRESS
MOV BL,[CURUA] ;
AND BX,0003H
PUSH BX
ADD BX,OFFSET VDSK_TYP
MOV AL,[BX] ;GET CURRENT DISK TYPE
CMP AL,5
POP BX ;850516
JB SUBVTB_FD
MOV SI,OFFSET VBPB ;850505
MOV AX,BX ;850516
MOV CL,13 ;850505
MUL CL ;850505
ADD SI,AX ;850505 TARGET BPB ADDR.
RET ;850516
SUBVTB_FD:
DEC AL ;160KB/180KB
JNE SUBVTB_FD10
MOV SI,OFFSET DSK5_SNG8
CMP AH,-2
JE SUBVTB_FD05
MOV SI,OFFSET DSK5_SNG9
SUBVTB_FD05:
JMP SUBVTB_COPY ;850506
SUBVTB_FD10:
DEC AL ;320KB/360KB
JNE SUBVTB_FD20
MOV SI,OFFSET DSK5_DBL8
CMP AH,-1
JE SUBVTB_FD15
MOV SI,OFFSET DSK5_DBL9
SUBVTB_FD15:
JMP SUBVTB_COPY
SUBVTB_FD20:
DEC AL ;640KB/720KB
JNE SUBVTB_FD30
MOV SI,OFFSET DSK5_DBL8D
CMP AH,-5
JE SUBVTB_FD25
MOV SI,OFFSET DSK5_DBL9D
SUBVTB_FD25:
JMP SUBVTB_COPY ;850506
SUBVTB_FD30:
MOV SI,OFFSET DSK8_DBL
SUBVTB_COPY: ;850506
PUSH ES ;850506
PUSH CS ;850506
POP ES ;850506
MOV DI,OFFSET VBPB ;850506
MOV AX,BX ;850516**
MOV CL,13 ;850506
MUL CL ;850506
ADD DI,AX ;850506
PUSH DI ;850506
CLD ;850506
MOV CX,13 ;850506
REP MOVSB ;850506 COPY BPB IMAGE
POP SI ;850506 SI := BPB ADDR
POP ES ;850506
RET
PAGE
;****************************************
;* *
;* WORK BUFFER *
;* *
;****************************************
HARD_WORK DB 512 DUP (?)
IPL_BUF DB 512 DUP (?)
ENDIF ;------------------------------------------------------------------
DSKIO_CODE_END:
DSKIO_END:
BIOS_CODE ENDS
END

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