INT 13,14 - Controller Internal Diagnostic (XT & newer)

AH = 14h

on return:

AH = status (see ~INT 13,STATUS~)

CF = 0 if successful

= 1 if error

- many good programming references indicate this function is only

available on the AT, PS/2 and later systems, but all hard disk

systems since the XT have this function available

- not valid on PS/2 model 30