INT 16H 11H: Query Extended Keyboard Status / Preview Key
[XT] [AT]
Expects: AH 11H
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Returns: ZF ZR = no keys in buffer
NZ = key is ready
AH (if ZR) scan code
AL ASCII character code or extended ASCII keystroke
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Info: This is identical to INT 16H 01H, except that it does not perform
"extended key filtering" to map 101-key 'board keystrokes to
84-key 'board equivalents.
See Also: INT 16H (BIOS keyboard services)
BIOS Data Area
ROM-BIOS Functions
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