IBM PC CONVERTIBLE

0000
0002
0004
0006
0008
OOOA
OOOC
OOOE
0010
0000
??
0001 ??
0002 08 -
243
OOOA ??
OOOB ??
OOOC ??
0000 ??
OOOE ??
OOOF ??
0010
0000
0000 0082
R
0002 00F6 R
0004 OOFD R
0006 0139 R
0008 010F R
OOOA 0122 R
OOOC 007C R
OOOE 007C R
0010 0494 R
0012 04E3 R
0014 050B R
0016 0580 R
0018
0018
FB
0019 50
001A 53
001B 51
001C 1E
0010 56
001E 57
001F 55
0020 52
0021 8B EC
0023 E8 0000
0026
2A FF
0028 8A DC
002A 80 FC 08
0020 76 15
002F 80 FC 15
0032 72 05
0034 80 FC 18
0037 72 08
??
(AH) = ALL OTHER VALUES
OUTPUT: AH=DISKETTLSTATUS = 01 (BAD COMMAND) CARRY FLAG SET
ASSUME CS: ROMCODE, OS: DATA
STRUCTURE DEFINING SAVE AREA ON STACK
REGSAVE STRUC
OX SAVE OW
BPSAVE OW
DISAVE OW
SISAVE OW
DSSAVE OW
CXSAVE OW
BXSAVE OW
AXSAVE OW
REGSAVE ENDS
REGHSAV STRUC
DLSAVE DB
DHSAVE DB ?
DB 8 DUP(?)
CLSAVE DB
CHSAVE DB
BLSAVE DB
BHSAVE DB
ALSAVE DB
AHSAVE DB
REGHSAV ENDS
DSKLTABLE LABEL WORD
OW OFFSET DISICRESET
OW OFFSET DISICSTATUS
OW OFFSET DISICREAD
OW OFFSET DISICWRITE
OW OFFSET DISICVERF
OW OFFSET DISICFORMAT
OW OFFSET DSKLINLCMD
OW OFFSET DSKLINLCMD
OW OFFSET DSKLRDPARM
OW OFFSET DSKLRDDASD
OW OFFSET DSKLCHANGE
OW OFFSET DSKLSETDASD
DSKLIO PROC
STI
FAR
PUSH
PUSH
PUSH
PUSH
PUSH
PUSH
PUSH
PUSH
MOV
CALL
SUB
MOV
CMP
JBE
CMP
JB
CMP
JB
AX
BX
CX
OS
SI
01
BP
OX
BP,SP
DDS
BH, BH
BL,AH
AH,8
010_1
AH,15H
DIO_INLCMD
AH,18H
010_0
FUNCTION CODE OUT OF RANGE
OX SAVE AREA ON STACK
BP SAVE AREA ON STACK
01 SAVE AREA ON STACK
SI SAVE AREA ON STACK
OS SAVE AREA ON STACK
CX SAVE AREA ON STACK
BX SAVE AREA ON STACK
AX SAVE AREA ON STACK
DL SAVE AREA ON STACK
DH SAVE AREA ON STACK
CL SAVE AREA ON STACK
CH SAVE AREA ON STACK
BL SAVE AREA ON STACK
BH SAVE AREA ON STACK
AL SAVE AREA ON STACK
AH SAVE AREA ON STACK
AH=O
AH=l
AH=2
AH=3
AH=4
AH=5
AH=6
AH=7
AH=8
AH=9
THRU
AH=15
AH=16
AH=17
DISK RESET COMMAND --
DISK STATUS COMMAND --
DISK READ COMMAND
DISK WRITE COMMAND --
DISK VERIFY COMMAND --
DISK FORMAT COMMAND --
INVALID COMMAND --
INVALID COMMAND --
READ DISKETTE DRIVE PARMS --
12 AND <17 ARE ALSO INVALID
DETERMINE SUPPORT OF DCL --
DISKETTE CHANGE LINE STAT --
DISKETTE SET OASD TYPE
I NTERRUPTS BACK ON
TEMPORARY SAVE AREA
SAVE ADDRESS
SAVE SEGMENT REGISTER VALUE
SAVE ALL REGISTERS DURING OPERATION
SET UP POINTER TO HEAD PARM
SET FUNCTION CODE IN LOW BYTE
CHECK FUNCTION RANGE
JUMP I F OKAY
CHECK FUNCTION RANGE
JUMP I F ERROR
JUMP I F BELOW LIMIT
JUMP IF OKAY AND IN 15-17 RANGE
ROM BIOS 2-123