User`s manual

DIGITAL-LOGIC AG MSLB-P5 Manual V0.3
PRELIMINARY 170
Continued
AH = 05h Format diskette track
Entry:
ES:BX Buffer address
DL Drive number (0-1)
DH Head number (0-1)
CH Track number (0-79)
CL Sector number (8-36)
AL Number of sectors (1-15)
Exit:
AL Number of sectors formatted
AH = 08h Read drive parameters
Entry:
DL Drive number
Exit:
ES:DI Pointer to parameter table
DH Maximum head number
DL Number of diskette drives present
CH Maximum track number
CL Drive capacity:
Bits 0-5 Maximum sector number
Bits 6-7 Maximum track number
BL Diskette drive type from CMOS:
Bits 0-3:
00 = CMOS not present or invalid
01 = 360 kB
02 = 1.2 MB
03 = 720 kB
04 = 1.44 MB
06 = 2.88 MB
Bits 4-7: 0
AH = 15h Read drive type
Entry:
DL Drive number
Exit:
AH 00 = Drive not present
01 = Drive cannot detect media change
02 = Drive can detect media change
03 = Fixed disk
AH = 16h Detect media change
Entry:
DL Drive Number (0-1)
Exit:
If Carry = 0:
AH 00 = Disk change not active
01 = Invalid drive number
06 = Either disk change line active or
change line not supported
80h = Drive not ready or no drive present:
(timeout)
AH = 17h Set diskette type
Entry:
AL Format:
00 = Invalid Request
01 = 360kB floppy in 360kB drive
02 = 360kB floppy in 1.2MB drive
03 = 1.2MB floppy in 1.2MB drive
04 = 720kB floppy in 720kB (1.44MB not supported)
DL Drive Number (0-1)
AH = 18h Set media type for format
Entry:
CH Maximum track number
CL Diskette parameters:
Bits 0-5: Maximum sector number
Bits 6-7: Maximum track number
DL Drive Number (0-1)
Exit:
ES:DI Pointer to parameter table
AH = 20h Get media type
Entry:
DL Drive number (0-1)
Exit: