INT 16,11 - Extended Get Keyboard Status (AT+)

AH = 11h

on return:

ZF = 0 if key pressed (data waiting)

AX = 0 if no scan code is available

AH = ~scan code~

AL = ASCII character or zero if special function key

- available on AT and PS/2 machines with extended keyboard support

- data is not removed from buffer

- similar to ~INT 16,1~