Difference between revisions of "Category:Z80 Routines:Input:DetectKeyPress"
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Returns the result in z flag. | Returns the result in z flag. | ||
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;out: z flag for no key, nz flag for any key pressed (except On) | ;out: z flag for no key, nz flag for any key pressed (except On) | ||
detectkeypress: | detectkeypress: | ||
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inc a | inc a | ||
ret | ret | ||
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Revision as of 05:41, 21 April 2010
This routines tells whether any keys at all are pressed.
Returns the result in z flag.
;out: z flag for no key, nz flag for any key pressed (except On) detectkeypress: xor a out (1),a ; any part of keyboard is detected nop nop in a,(1) inc a ret
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