INT 13H (0x13)
Function 07H (0x07) >> Format drive
Call with: AH = 07H
AL = interleave
CH = cylinder
DL = drive
80H-FFH fixed disk
Returns: If function successful
Carry flag = clear
AH = 00H
If function unsuccessful
Carry flag = set
AH = status (see the status table given
earlier)
Comments:
This function is defined for PC/XT fixed disk drives only. It formats the entire drive, writing disk address fields and data sectors, starting at the specified cylinder.
INT 13H (0x13)
Function 08H (0x08) >> Get drive parameters
Call with: AH = 08H
DL = drive
00H-7FH floppy disk
80H-FFH fixed disk
Returns: If function successful
Carry flag = clear
BL = drive type (PC/AT and PS/2 floppy
disk)
Value |
Description |
01H |
360KB, 40 track, 5.25” |
02H |
1.2MB, 80 track, 5.25” |
03H |
720KB, 80 track, 3.5” |
04H |
1.44MB, 80 track, 3.5” |
CH = low 8 bits of maximum cylinder
number
CL = bits 6-7 high order 2 bits of maximum
cylinder number bits 0-5 maximum
sector number
DH = maximum head number
DL = number of drives
ES: DI = segment: offset of disk drive
parameter table
If function unsuccessful
Carry flag = set
AH = status
Comments:
This function returns various parameters for the specified drive. The value returned in register DL reflects the true number of physical drives attached to the adapter for the requested drive.
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