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AH = A2h
Return:
AH <= 80h if 122-key keyboard functions (AH=20h-22h) supported
Desc: This function is called by the DOS 3.2 KEYBxx.COM and DOS 5+ KEYB.COM to determine the highest supported keyboard function
Note: Many BIOSes (including at least some versions of Phoenix and AMI) will destroy AH on return from functions higher than AH=12h, returning 12h less than was in AH on entry (due to a chain of DEC/JZ instructions)
See Also: AH=05h"PCjr" - AH=92h - INT 2F/AX=AD80h
Category: Keyboard Enhancers - Int 16h - K
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