2018-01-01 14:59:15 +00:00
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.pc = $801 "Basic"
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:BasicUpstart(main)
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.pc = $80d "Program"
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2018-03-25 21:40:38 +00:00
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.label print_char_cursor = 9
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.label print_line_cursor = 4
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2018-01-01 14:59:15 +00:00
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main: {
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2019-05-31 21:17:57 +00:00
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.label b = $e
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2018-01-01 14:59:15 +00:00
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.label a = 2
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2018-01-01 21:59:06 +00:00
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.label i = 3
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2018-01-01 14:59:15 +00:00
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jsr print_cls
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2018-03-25 21:40:38 +00:00
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lda #<$400
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sta print_line_cursor
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lda #>$400
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sta print_line_cursor+1
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2018-01-01 21:59:06 +00:00
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lda #0
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sta i
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2018-03-25 21:40:38 +00:00
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lda #<$400
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sta print_char_cursor
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lda #>$400
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sta print_char_cursor+1
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2018-01-01 21:59:06 +00:00
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lda #7
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2018-01-01 14:59:15 +00:00
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sta a
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b1:
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2018-01-02 09:17:59 +00:00
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lda #$ce
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2018-01-01 14:59:15 +00:00
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sec
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sbc a
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2018-01-02 09:17:59 +00:00
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sta b
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2018-01-01 21:59:06 +00:00
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lda a
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2018-01-02 09:17:59 +00:00
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cmp b
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2019-03-29 23:15:53 +00:00
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bcs b22
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2018-01-01 14:59:15 +00:00
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ldx #'+'
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jmp b2
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2019-03-29 23:15:53 +00:00
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b22:
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2018-01-01 14:59:15 +00:00
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ldx #'-'
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b2:
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2018-01-02 09:17:59 +00:00
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lda b
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sta printu.b
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lda #<op
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2018-01-01 14:59:15 +00:00
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sta printu.op
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2018-01-02 09:17:59 +00:00
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lda #>op
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sta printu.op+1
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2018-01-01 14:59:15 +00:00
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jsr printu
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lda a
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2018-01-02 09:17:59 +00:00
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cmp #$37
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2019-03-29 23:15:53 +00:00
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bcs b23
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2018-01-01 14:59:15 +00:00
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ldx #'+'
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jmp b3
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2019-03-29 23:15:53 +00:00
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b23:
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2018-01-01 14:59:15 +00:00
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ldx #'-'
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b3:
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2018-01-02 09:17:59 +00:00
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lda #$37
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2018-01-01 14:59:15 +00:00
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sta printu.b
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2019-02-24 22:23:57 +00:00
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lda #<op
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2018-01-01 14:59:15 +00:00
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sta printu.op
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2019-02-24 22:23:57 +00:00
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lda #>op
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2018-01-02 09:17:59 +00:00
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sta printu.op+1
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2018-01-01 14:59:15 +00:00
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jsr printu
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lda a
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2018-01-01 21:59:06 +00:00
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ldy i
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2018-01-01 14:59:15 +00:00
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cmp cs,y
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2019-03-29 23:15:53 +00:00
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bcs b24
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2018-01-01 14:59:15 +00:00
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ldx #'+'
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jmp b4
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2019-03-29 23:15:53 +00:00
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b24:
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2018-01-01 14:59:15 +00:00
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ldx #'-'
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b4:
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2018-01-01 21:59:06 +00:00
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ldy i
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2018-01-01 14:59:15 +00:00
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lda cs,y
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sta printu.b
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2019-02-24 22:23:57 +00:00
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lda #<op
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2018-01-01 14:59:15 +00:00
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sta printu.op
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2019-02-24 22:23:57 +00:00
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lda #>op
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2018-01-02 09:17:59 +00:00
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sta printu.op+1
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2018-01-01 14:59:15 +00:00
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jsr printu
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2018-01-01 21:59:06 +00:00
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lda a
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cmp a
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2019-03-29 23:15:53 +00:00
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bcs b25
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2018-01-01 21:59:06 +00:00
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ldx #'+'
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jmp b5
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2019-03-29 23:15:53 +00:00
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b25:
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2018-01-01 21:59:06 +00:00
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ldx #'-'
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b5:
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lda a
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sta printu.b
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2019-02-24 22:23:57 +00:00
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lda #<op
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2018-01-01 21:59:06 +00:00
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sta printu.op
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2019-02-24 22:23:57 +00:00
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lda #>op
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2018-01-02 09:17:59 +00:00
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sta printu.op+1
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jsr printu
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jsr print_ln
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lda b
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cmp a
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2019-03-29 23:15:53 +00:00
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bcs b26
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2018-01-02 09:17:59 +00:00
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ldx #'+'
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jmp b6
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2019-03-29 23:15:53 +00:00
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b26:
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2018-01-02 09:17:59 +00:00
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ldx #'-'
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b6:
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lda b
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sta printu.b
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2018-03-25 21:40:38 +00:00
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lda print_line_cursor
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sta print_char_cursor
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lda print_line_cursor+1
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sta print_char_cursor+1
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2018-01-02 09:17:59 +00:00
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lda #<op4
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sta printu.op
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lda #>op4
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sta printu.op+1
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jsr printu
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2019-04-10 14:06:03 +00:00
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lda a
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cmp #$37+1
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bcc b27
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2018-01-02 09:17:59 +00:00
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ldx #'+'
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jmp b7
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2019-03-29 23:15:53 +00:00
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b27:
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2018-01-02 09:17:59 +00:00
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ldx #'-'
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b7:
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lda #$37
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sta printu.b
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2019-02-24 22:23:57 +00:00
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lda #<op4
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2018-01-02 09:17:59 +00:00
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sta printu.op
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2019-02-24 22:23:57 +00:00
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lda #>op4
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2018-01-02 09:17:59 +00:00
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sta printu.op+1
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jsr printu
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ldy i
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2018-01-05 21:29:21 +00:00
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lda cs,y
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cmp a
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2019-03-29 23:15:53 +00:00
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bcs b28
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2018-01-02 09:17:59 +00:00
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ldx #'+'
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jmp b8
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2019-03-29 23:15:53 +00:00
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b28:
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2018-01-02 09:17:59 +00:00
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ldx #'-'
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b8:
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ldy i
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lda cs,y
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sta printu.b
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2019-02-24 22:23:57 +00:00
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lda #<op4
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2018-01-02 09:17:59 +00:00
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sta printu.op
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2019-02-24 22:23:57 +00:00
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lda #>op4
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2018-01-02 09:17:59 +00:00
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sta printu.op+1
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jsr printu
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lda a
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cmp a
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2019-03-29 23:15:53 +00:00
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bcs b29
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2018-01-02 09:17:59 +00:00
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ldx #'+'
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jmp b9
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2019-03-29 23:15:53 +00:00
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b29:
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2018-01-02 09:17:59 +00:00
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ldx #'-'
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b9:
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lda a
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sta printu.b
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2019-02-24 22:23:57 +00:00
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lda #<op4
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2018-01-02 09:17:59 +00:00
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sta printu.op
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2019-02-24 22:23:57 +00:00
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lda #>op4
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2018-01-02 09:17:59 +00:00
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sta printu.op+1
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jsr printu
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jsr print_ln
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lda b
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cmp a
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2019-03-29 23:15:53 +00:00
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bcc b30
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2018-01-02 09:17:59 +00:00
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ldx #'+'
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jmp b10
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2019-03-29 23:15:53 +00:00
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b30:
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2018-01-02 09:17:59 +00:00
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ldx #'-'
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b10:
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lda b
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sta printu.b
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2018-03-25 21:40:38 +00:00
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lda print_line_cursor
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sta print_char_cursor
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lda print_line_cursor+1
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sta print_char_cursor+1
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2018-01-02 09:17:59 +00:00
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lda #<op8
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sta printu.op
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lda #>op8
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sta printu.op+1
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jsr printu
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2019-04-10 14:06:03 +00:00
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lda a
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cmp #$37+1
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bcs b31
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2018-01-02 09:17:59 +00:00
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ldx #'+'
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jmp b11
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2019-03-29 23:15:53 +00:00
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b31:
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2018-01-02 09:17:59 +00:00
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ldx #'-'
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b11:
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lda #$37
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sta printu.b
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2019-02-24 22:23:57 +00:00
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lda #<op8
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2018-01-02 09:17:59 +00:00
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sta printu.op
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2019-02-24 22:23:57 +00:00
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lda #>op8
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2018-01-02 09:17:59 +00:00
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sta printu.op+1
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jsr printu
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ldy i
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2018-01-05 21:29:21 +00:00
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lda cs,y
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cmp a
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2019-03-29 23:15:53 +00:00
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bcc b32
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2018-01-02 09:17:59 +00:00
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ldx #'+'
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jmp b12
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2019-03-29 23:15:53 +00:00
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b32:
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2018-01-02 09:17:59 +00:00
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ldx #'-'
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b12:
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ldy i
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lda cs,y
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sta printu.b
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2019-02-24 22:23:57 +00:00
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lda #<op8
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2018-01-02 09:17:59 +00:00
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sta printu.op
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2019-02-24 22:23:57 +00:00
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lda #>op8
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2018-01-02 09:17:59 +00:00
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sta printu.op+1
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jsr printu
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lda a
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cmp a
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2019-03-29 23:15:53 +00:00
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bcc b33
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2018-01-02 09:17:59 +00:00
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ldx #'+'
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jmp b13
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2019-03-29 23:15:53 +00:00
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b33:
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2018-01-02 09:17:59 +00:00
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ldx #'-'
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b13:
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lda a
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sta printu.b
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2019-02-24 22:23:57 +00:00
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lda #<op8
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2018-01-02 09:17:59 +00:00
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sta printu.op
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2019-02-24 22:23:57 +00:00
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lda #>op8
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2018-01-02 09:17:59 +00:00
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sta printu.op+1
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jsr printu
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jsr print_ln
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lda a
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cmp b
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2019-03-29 23:15:53 +00:00
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bcc b34
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2018-01-02 09:17:59 +00:00
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ldx #'+'
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jmp b14
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2019-03-29 23:15:53 +00:00
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b34:
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2018-01-02 09:17:59 +00:00
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ldx #'-'
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b14:
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lda b
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sta printu.b
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2018-03-25 21:40:38 +00:00
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lda print_line_cursor
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sta print_char_cursor
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lda print_line_cursor+1
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sta print_char_cursor+1
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2018-01-02 09:17:59 +00:00
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lda #<op12
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sta printu.op
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lda #>op12
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sta printu.op+1
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jsr printu
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lda a
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cmp #$37
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2019-03-29 23:15:53 +00:00
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bcc b35
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2018-01-02 09:17:59 +00:00
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ldx #'+'
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jmp b15
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2019-03-29 23:15:53 +00:00
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b35:
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2018-01-02 09:17:59 +00:00
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ldx #'-'
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b15:
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lda #$37
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sta printu.b
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2019-02-24 22:23:57 +00:00
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lda #<op12
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2018-01-02 09:17:59 +00:00
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sta printu.op
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2019-02-24 22:23:57 +00:00
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lda #>op12
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2018-01-02 09:17:59 +00:00
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sta printu.op+1
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jsr printu
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lda a
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ldy i
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cmp cs,y
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2019-03-29 23:15:53 +00:00
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bcc b36
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2018-01-02 09:17:59 +00:00
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ldx #'+'
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jmp b16
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2019-03-29 23:15:53 +00:00
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b36:
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2018-01-02 09:17:59 +00:00
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ldx #'-'
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b16:
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ldy i
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lda cs,y
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sta printu.b
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2019-02-24 22:23:57 +00:00
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lda #<op12
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2018-01-02 09:17:59 +00:00
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sta printu.op
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2019-02-24 22:23:57 +00:00
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lda #>op12
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2018-01-02 09:17:59 +00:00
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sta printu.op+1
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jsr printu
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lda a
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cmp a
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2019-03-29 23:15:53 +00:00
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bcc b37
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2018-01-02 09:17:59 +00:00
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ldx #'+'
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jmp b17
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2019-03-29 23:15:53 +00:00
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b37:
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2018-01-02 09:17:59 +00:00
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ldx #'-'
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b17:
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lda a
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sta printu.b
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2019-02-24 22:23:57 +00:00
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lda #<op12
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2018-01-02 09:17:59 +00:00
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sta printu.op
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2019-02-24 22:23:57 +00:00
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lda #>op12
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2018-01-02 09:17:59 +00:00
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sta printu.op+1
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jsr printu
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jsr print_ln
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lda a
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cmp b
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2019-03-29 23:15:53 +00:00
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bne b38
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2018-01-02 09:17:59 +00:00
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ldx #'+'
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jmp b18
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2019-03-29 23:15:53 +00:00
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b38:
|
2018-01-02 09:17:59 +00:00
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ldx #'-'
|
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b18:
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lda b
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sta printu.b
|
2018-03-25 21:40:38 +00:00
|
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lda print_line_cursor
|
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sta print_char_cursor
|
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lda print_line_cursor+1
|
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|
|
sta print_char_cursor+1
|
2018-01-02 09:17:59 +00:00
|
|
|
lda #<op16
|
|
|
|
sta printu.op
|
|
|
|
lda #>op16
|
|
|
|
sta printu.op+1
|
|
|
|
jsr printu
|
2019-03-26 22:49:44 +00:00
|
|
|
lda #$37
|
|
|
|
cmp a
|
2019-03-29 23:15:53 +00:00
|
|
|
bne b39
|
2018-01-02 09:17:59 +00:00
|
|
|
ldx #'+'
|
|
|
|
jmp b19
|
2019-03-29 23:15:53 +00:00
|
|
|
b39:
|
2018-01-02 09:17:59 +00:00
|
|
|
ldx #'-'
|
|
|
|
b19:
|
|
|
|
lda #$37
|
|
|
|
sta printu.b
|
2019-02-24 22:23:57 +00:00
|
|
|
lda #<op16
|
2018-01-02 09:17:59 +00:00
|
|
|
sta printu.op
|
2019-02-24 22:23:57 +00:00
|
|
|
lda #>op16
|
2018-01-02 09:17:59 +00:00
|
|
|
sta printu.op+1
|
|
|
|
jsr printu
|
|
|
|
lda a
|
|
|
|
ldy i
|
|
|
|
cmp cs,y
|
2019-03-29 23:15:53 +00:00
|
|
|
bne b40
|
2018-01-02 09:17:59 +00:00
|
|
|
ldx #'+'
|
|
|
|
jmp b20
|
2019-03-29 23:15:53 +00:00
|
|
|
b40:
|
2018-01-02 09:17:59 +00:00
|
|
|
ldx #'-'
|
|
|
|
b20:
|
|
|
|
ldy i
|
|
|
|
lda cs,y
|
|
|
|
sta printu.b
|
2019-02-24 22:23:57 +00:00
|
|
|
lda #<op16
|
2018-01-02 09:17:59 +00:00
|
|
|
sta printu.op
|
2019-02-24 22:23:57 +00:00
|
|
|
lda #>op16
|
2018-01-02 09:17:59 +00:00
|
|
|
sta printu.op+1
|
|
|
|
jsr printu
|
|
|
|
lda a
|
|
|
|
cmp a
|
2019-03-29 23:15:53 +00:00
|
|
|
bne b41
|
2018-01-02 09:17:59 +00:00
|
|
|
ldx #'+'
|
|
|
|
jmp b21
|
2019-03-29 23:15:53 +00:00
|
|
|
b41:
|
2018-01-02 09:17:59 +00:00
|
|
|
ldx #'-'
|
|
|
|
b21:
|
|
|
|
lda a
|
|
|
|
sta printu.b
|
2019-02-24 22:23:57 +00:00
|
|
|
lda #<op16
|
2018-01-02 09:17:59 +00:00
|
|
|
sta printu.op
|
2019-02-24 22:23:57 +00:00
|
|
|
lda #>op16
|
2018-01-02 09:17:59 +00:00
|
|
|
sta printu.op+1
|
2018-01-01 21:59:06 +00:00
|
|
|
jsr printu
|
2018-01-01 14:59:15 +00:00
|
|
|
jsr print_ln
|
2019-03-26 22:49:44 +00:00
|
|
|
lax a
|
2019-03-27 06:47:31 +00:00
|
|
|
axs #-[$30]
|
2019-03-26 22:49:44 +00:00
|
|
|
stx a
|
2018-01-01 21:59:06 +00:00
|
|
|
inc i
|
2019-03-26 22:49:44 +00:00
|
|
|
lda #5
|
|
|
|
cmp i
|
2019-03-31 15:10:41 +00:00
|
|
|
bne b68
|
|
|
|
b42:
|
|
|
|
jmp b42
|
|
|
|
b68:
|
2018-03-25 21:40:38 +00:00
|
|
|
lda print_line_cursor
|
|
|
|
sta print_char_cursor
|
|
|
|
lda print_line_cursor+1
|
|
|
|
sta print_char_cursor+1
|
2018-01-01 14:59:15 +00:00
|
|
|
jmp b1
|
2018-01-02 09:17:59 +00:00
|
|
|
op: .text "< @"
|
|
|
|
op4: .text "> @"
|
|
|
|
op8: .text "<=@"
|
|
|
|
op12: .text ">=@"
|
|
|
|
op16: .text "==@"
|
|
|
|
cs: .byte 7, $c7, $37, $97, $67
|
2018-01-01 14:59:15 +00:00
|
|
|
}
|
2019-02-17 23:12:29 +00:00
|
|
|
// Print a newline
|
2018-01-01 14:59:15 +00:00
|
|
|
print_ln: {
|
|
|
|
b1:
|
2019-03-18 01:23:29 +00:00
|
|
|
lda #$28
|
2018-01-01 14:59:15 +00:00
|
|
|
clc
|
2019-03-18 01:23:29 +00:00
|
|
|
adc print_line_cursor
|
2018-03-25 21:40:38 +00:00
|
|
|
sta print_line_cursor
|
2018-01-01 14:59:15 +00:00
|
|
|
bcc !+
|
2018-03-25 21:40:38 +00:00
|
|
|
inc print_line_cursor+1
|
2018-01-01 14:59:15 +00:00
|
|
|
!:
|
2018-03-25 21:40:38 +00:00
|
|
|
lda print_line_cursor+1
|
|
|
|
cmp print_char_cursor+1
|
2018-01-01 14:59:15 +00:00
|
|
|
bcc b1
|
|
|
|
bne !+
|
2018-03-25 21:40:38 +00:00
|
|
|
lda print_line_cursor
|
|
|
|
cmp print_char_cursor
|
2018-01-01 14:59:15 +00:00
|
|
|
bcc b1
|
|
|
|
!:
|
|
|
|
rts
|
|
|
|
}
|
2019-02-19 19:51:48 +00:00
|
|
|
// printu(byte zeropage(2) a, byte[] zeropage(6) op, byte zeropage(8) b, byte register(X) res)
|
2018-01-01 14:59:15 +00:00
|
|
|
printu: {
|
|
|
|
.label a = 2
|
2018-01-02 09:17:59 +00:00
|
|
|
.label b = 8
|
2018-01-01 21:59:06 +00:00
|
|
|
.label op = 6
|
2018-01-01 14:59:15 +00:00
|
|
|
lda #' '
|
|
|
|
jsr print_char
|
|
|
|
lda a
|
|
|
|
sta print_byte.b
|
|
|
|
jsr print_byte
|
2018-01-02 09:17:59 +00:00
|
|
|
jsr print_str
|
2018-01-01 14:59:15 +00:00
|
|
|
lda b
|
|
|
|
sta print_byte.b
|
|
|
|
jsr print_byte
|
|
|
|
lda #' '
|
|
|
|
jsr print_char
|
|
|
|
txa
|
|
|
|
jsr print_char
|
|
|
|
rts
|
|
|
|
}
|
2019-02-17 23:12:29 +00:00
|
|
|
// Print a single char
|
2019-02-19 19:51:48 +00:00
|
|
|
// print_char(byte register(A) ch)
|
2018-01-01 14:59:15 +00:00
|
|
|
print_char: {
|
|
|
|
ldy #0
|
2018-03-25 21:40:38 +00:00
|
|
|
sta (print_char_cursor),y
|
|
|
|
inc print_char_cursor
|
2018-01-01 14:59:15 +00:00
|
|
|
bne !+
|
2018-03-25 21:40:38 +00:00
|
|
|
inc print_char_cursor+1
|
2018-01-01 14:59:15 +00:00
|
|
|
!:
|
|
|
|
rts
|
|
|
|
}
|
2019-02-17 23:12:29 +00:00
|
|
|
// Print a byte as HEX
|
2019-02-19 19:51:48 +00:00
|
|
|
// print_byte(byte zeropage($b) b)
|
2018-01-01 14:59:15 +00:00
|
|
|
print_byte: {
|
2018-01-02 09:17:59 +00:00
|
|
|
.label b = $b
|
2018-01-01 14:59:15 +00:00
|
|
|
lda b
|
|
|
|
lsr
|
|
|
|
lsr
|
|
|
|
lsr
|
|
|
|
lsr
|
|
|
|
tay
|
2018-04-02 22:02:25 +00:00
|
|
|
lda print_hextab,y
|
2018-01-01 14:59:15 +00:00
|
|
|
jsr print_char
|
2018-01-21 10:14:20 +00:00
|
|
|
lda #$f
|
|
|
|
and b
|
2018-01-01 14:59:15 +00:00
|
|
|
tay
|
2018-04-02 22:02:25 +00:00
|
|
|
lda print_hextab,y
|
2018-01-01 14:59:15 +00:00
|
|
|
jsr print_char
|
|
|
|
rts
|
|
|
|
}
|
2019-02-17 23:12:29 +00:00
|
|
|
// Print a zero-terminated string
|
2019-02-19 19:51:48 +00:00
|
|
|
// print_str(byte* zeropage(6) str)
|
2018-01-02 09:17:59 +00:00
|
|
|
print_str: {
|
|
|
|
.label str = 6
|
|
|
|
b1:
|
|
|
|
ldy #0
|
|
|
|
lda (str),y
|
|
|
|
cmp #'@'
|
|
|
|
bne b2
|
|
|
|
rts
|
|
|
|
b2:
|
|
|
|
ldy #0
|
|
|
|
lda (str),y
|
2018-03-25 21:40:38 +00:00
|
|
|
sta (print_char_cursor),y
|
|
|
|
inc print_char_cursor
|
2018-01-02 09:17:59 +00:00
|
|
|
bne !+
|
2018-03-25 21:40:38 +00:00
|
|
|
inc print_char_cursor+1
|
2018-01-02 09:17:59 +00:00
|
|
|
!:
|
|
|
|
inc str
|
|
|
|
bne !+
|
|
|
|
inc str+1
|
|
|
|
!:
|
|
|
|
jmp b1
|
|
|
|
}
|
2019-02-17 23:12:29 +00:00
|
|
|
// Clear the screen. Also resets current line/char cursor.
|
2018-01-01 14:59:15 +00:00
|
|
|
print_cls: {
|
2019-05-31 21:17:57 +00:00
|
|
|
.label sc = $c
|
2018-03-25 21:40:38 +00:00
|
|
|
lda #<$400
|
2018-01-01 14:59:15 +00:00
|
|
|
sta sc
|
2018-03-25 21:40:38 +00:00
|
|
|
lda #>$400
|
2018-01-01 14:59:15 +00:00
|
|
|
sta sc+1
|
|
|
|
b1:
|
|
|
|
lda #' '
|
|
|
|
ldy #0
|
|
|
|
sta (sc),y
|
|
|
|
inc sc
|
|
|
|
bne !+
|
|
|
|
inc sc+1
|
|
|
|
!:
|
|
|
|
lda sc+1
|
2018-03-25 21:40:38 +00:00
|
|
|
cmp #>$400+$3e8
|
2018-01-01 14:59:15 +00:00
|
|
|
bne b1
|
|
|
|
lda sc
|
2018-03-25 21:40:38 +00:00
|
|
|
cmp #<$400+$3e8
|
2018-01-01 14:59:15 +00:00
|
|
|
bne b1
|
|
|
|
rts
|
|
|
|
}
|
2018-04-02 22:02:25 +00:00
|
|
|
print_hextab: .text "0123456789abcdef"
|