INT 13,0 - Reset Disk System
AH = 00
DL = drive number (0=A:, 1=2nd floppy, 80h=drive 0, 81h=drive 1)
on return:
AH = disk operation status (see INT 13,STATUS)
CF = 0 if successful
= 1 if error
- clears reset flag in controller and pulls heads to track 0
- setting the controller reset flag causes the disk to recalibrate
on the next disk operation
- if bit 7 is set, the diskette drive indicated by the lower 7 bits
will reset then the hard disk will follow; return code in AH is
for the drive requested