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93 lines
1.2 KiB
NASM
93 lines
1.2 KiB
NASM
// Test rewriting of constant comparisons
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.pc = $801 "Basic"
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:BasicUpstart(main)
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.pc = $80d "Program"
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main: {
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.label sc = 2
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.label screen = 4
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lda #<$400
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sta.z sc
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lda #>$400
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sta.z sc+1
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__b1:
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lda #' '
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ldy #0
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sta (sc),y
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inc.z sc
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bne !+
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inc.z sc+1
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!:
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lda.z sc+1
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cmp #>$400+$3e8+1
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bne __b1
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lda.z sc
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cmp #<$400+$3e8+1
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bne __b1
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ldx #0
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__b2:
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lda header,x
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cmp #0
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bne __b3
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lda #<$400
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sta.z screen
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lda #>$400
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sta.z screen+1
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ldx #0
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__b4:
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cpx #9+1
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bcc __b5
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rts
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__b5:
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lda #$28
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clc
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adc.z screen
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sta.z screen
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bcc !+
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inc.z screen+1
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!:
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txa
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clc
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adc #'0'
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ldy #0
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sta (screen),y
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cpx #5
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bcs __b6
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lda #'+'
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ldy #2
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sta (screen),y
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__b6:
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cpx #5+1
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bcs __b7
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lda #'+'
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ldy #5
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sta (screen),y
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__b7:
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cpx #5
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bne __b8
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lda #'+'
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ldy #8
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sta (screen),y
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__b8:
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cpx #5
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bcc __b9
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lda #'+'
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ldy #$b
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sta (screen),y
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__b9:
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cpx #5+1
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bcc __b10
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lda #'+'
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ldy #$e
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sta (screen),y
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__b10:
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inx
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jmp __b4
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__b3:
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lda header,x
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sta $400,x
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inx
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jmp __b2
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header: .text " < <= == >= >"
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.byte 0
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}
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