INT 13H (0x13) Function 15H (0x15 or 21) Get disk type function returns a code indicating type of floppy fixed disk referenced by specified drive code Function 16H (0x16 or 22) Get disk change status function returns status of change line indicating

INT 13H (0x13)

Function 15H (0x15 or 21) >> Get disk type

Call with:AH = 15H
DL = drive
00H-7FH floppy disk
80H-FFH fixed disk

Returns:If function successful
Carry flag = clear
AH = drive type code

And, if fixed disk (AH =03H)
CX: DX = number of 512-byte sectors

If function unsuccessful
Carry flag = set
AH = status

Comments:
This function returns a code indicating the type of floppy or fixed disk referenced by the specified drive code.

INT 13H (0x13)

Function 16H (0x16 or 22) >> Get disk change status

Call with: AH = 16H
DL = drive
00H-7FH floppy disk

Returns:If change line inactive and disk has not been changed
Carry flag = clear
AH = 00H

If change line active and disk may have been changed
Carry flag = set
AH = 06H

Comments:

This function returns the status of the change line, indicating whether the disk in the drive may have been replaced since the last disk access. If this function returns with the carry flag set, the disk has not necessarily been changed and the change line can be activated by simply unlocking and locking the disk drive door without removing the floppy disk.

page 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 page 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38