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