Int13h AH=00h(磁碟 - 重置磁碟系統) -- BIOS Int13h

RESET DISK SYSTEM

Input:

AH = 00h

DL = drive (if bit 7 is set both hard disks and floppy disks reset)

Return:
AH = status (see Values for disk operation status)

CF clear if successful (returned AH=00h)
CF set on error

Note: forces controller to recalibrate drive heads (seek to track 0) for PS/2 35SX, 35LS, 40SX and L40SX, as well as many other systems, both the master drive and the slave drive respond to the Reset function that is issued to either drive.