2015-09-27 18:12:25 +02:00
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;
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; char cgetc (void);
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;
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.export soft80_cgetc
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2015-09-28 16:10:11 +02:00
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.import cursor
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2015-09-27 19:10:06 +02:00
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.import soft80_putcolor
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2015-09-27 18:12:25 +02:00
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.include "c64.inc"
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.include "soft80.inc"
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soft80_cgetc:
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lda KEY_COUNT ; Get number of characters
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bne L3 ; 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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jsr setcursor ; set cursor on or off accordingly
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L1: lda KEY_COUNT ; wait for key
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beq L1
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ldx #0
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lda CURS_FLAG
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bne L2
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inx
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L2: txa
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jsr setcursor
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L3: jsr KBDREAD ; Read char and return in A
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ldx #0
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rts
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; Switch the cursor on or off
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; A= 0: cursor off
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; 1: cursor on
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.proc setcursor
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; On or off?
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cmp CURS_STATE
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bne @set
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rts
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@set:
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sta CURS_STATE
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sei
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lda $01
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pha
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lda #$34
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sta $01
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2015-09-27 19:10:06 +02:00
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jsr soft80_putcolor
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2015-09-27 18:12:25 +02:00
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ldy #$00
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lda CURS_X
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and #$01
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bne @l1
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.repeat 8,line
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lda (SCREEN_PTR),y
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eor #$f0
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sta (SCREEN_PTR),y
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.if (line < 7)
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iny
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.endif
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.endrepeat
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@back:
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pla
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sta $01
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cli
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rts
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@l1:
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.repeat 8,line
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lda (SCREEN_PTR),y
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eor #$0f
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sta (SCREEN_PTR),y
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.if line < 7
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iny
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.endif
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.endrepeat
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jmp @back
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.endproc
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