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32 lines
521 B
ArmAsm
32 lines
521 B
ArmAsm
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; Ullrich von Bassewitz, 06.08.1998
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;
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; char cgetc (void);
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;
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.export _cgetc
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.import cursor
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.include "c128.inc"
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_cgetc: lda KEY_COUNT ; Get number of characters
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bne L2 ; Jump if there are already chars waiting
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; Switch on the cursor if needed
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lda cursor
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beq L1
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jsr CURS_ON
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jmp L2
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L1: lda #$01
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jsr CURS_OFF
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L2: lda KEY_COUNT ; Check characters again
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beq L2
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jsr CURS_OFF ; Switch cursor off, if characters available
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jsr KBDREAD ; Read char and return in A
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ldx #0
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rts
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