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30 lines
610 B
ArmAsm
30 lines
610 B
ArmAsm
;
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; Jede, 2021-02-01
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;
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; int kbhit (void);
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;
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.export _kbhit
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.import store_char
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.include "telestrat.inc"
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_kbhit:
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lda store_char ; Check if a key has been detected previously
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beq @call_telemon ; No, calls Telemon routine
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lda #$01 ; There is a key pressed previously, return 1
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ldx #$00
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rts
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@call_telemon:
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BRK_TELEMON XRD0
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ldx #$00
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bcs @no_char_action
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sta store_char
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lda #$01
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rts
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@no_char_action:
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tax
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rts
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