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AH = 21h
Return:
ZF set if no keystroke available ZF clear if keystroke available AH = BIOS scan code AL = ASCII character
Notes: Use AH=09h to determine whether this function is supported. Some versions of the IBM BIOS Technical Reference erroneously report that CF is returned instead of ZF. K3PLUS v6.00+ supports this function as an alias of AH=11h
See Also: AH=01h - AH=09h - AH=11h - AH=20h -
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