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cc65/libsrc/c128/cgetc.s
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ArmAsm

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