INT 13,17 - Set DASD Type for Format (XT BIOS from 1/10/86 & newer)

AH = 17h

AL = 00 no disk

= 01 320k/360k diskette in 320k/360k drive

= 02 320k/360k diskette in 1.2Mb drive

= 03 1.2Mb diskette in 1.2Mb drive

= 04 720k diskette in 720k drive (BIOS 6/10/85 & newer)

720K diskette in 1.44Mb drive (PS/2)

1.44Mb diskette in 1.44Mb drive (PS/2)

DL = drive number (0=A:, 1=2nd floppy, 80h=drive 0, 81h=drive 1)

returns nothing

- only the disk number is checked for validity

- tells BIOS format routine about the disk type