2003-04-13 22:12:09 +00:00
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; Ullrich von Bassewitz, 2003-04-13
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;
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; int kbhit (void);
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;
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2013-05-09 13:56:54 +02:00
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.export _kbhit
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2003-04-13 22:12:09 +00:00
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2013-05-09 13:56:54 +02:00
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.include "atmos.inc"
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2003-04-13 22:12:09 +00:00
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_kbhit:
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ldx #$00 ; Load high byte
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lda KEYBUF ; Flag for new char in bit 7
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asl a ; Shift bit 7 into carry
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txa ; A = 0
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rol a ; Move old bit 7 into bit 0
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rts
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