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46 lines
727 B
NASM
46 lines
727 B
NASM
// Check that multiplication by factors of 2 is converted to shifts
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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 SCREEN = $400
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ldx #0
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__b1:
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// (SCREEN+0*40)[i] = i*1
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txa
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sta SCREEN,x
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// i*2
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txa
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asl
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// (SCREEN+1*40)[i] = i*2
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sta SCREEN+1*$28,x
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// i*4
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txa
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asl
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asl
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// (SCREEN+2*40)[i] = i*4
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sta SCREEN+2*$28,x
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// i*8
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txa
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asl
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asl
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asl
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// (SCREEN+3*40)[i] = i*8
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sta SCREEN+3*$28,x
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// sb = -(signed byte)i
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txa
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eor #$ff
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clc
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adc #1
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// sb*2
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asl
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// (SCREEN+5*40)[i] = (byte)(sb*2)
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sta SCREEN+5*$28,x
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// for(byte i: 0..10)
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inx
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cpx #$b
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bne __b1
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// }
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rts
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}
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