INT 15,91 - Interrupt Complete

AH = 91h

on return:

CF = 0 if successful

= 1 if error

AH = when CF set, 80h for PC & PCjr, 86h for XT (BIOS 11/8/82)

AL = type code:

= 00 disk

= 01 diskette

= 02 keyboard

= 03 pointing device

= 80 network (ES:BX = NCB)

= FC fixed disk reset (PS/2)

= FD diskette motor start

= FE printer

- should not be used by applications software

- used by the BIOS to indicate device interrupt is complete

- used for multitasking OS development