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30 lines
357 B
Text
30 lines
357 B
Text
LDB #$F0
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JNC bankNoCarry
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NOT B
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bankNoCarry:
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LDA $00
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AND B,A
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OR D,A
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STA $00
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RET
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; Memory copy: A=start, B=offset, length=C, destroys D
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copyLoop:
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LDD $00,A
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ADC B,A
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STD $00,A
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DEC C
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JNZ copyLoop
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RET
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; Memory copy to screen: A=start, destroys C, D, screen address register
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LDD #$80
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LDC D
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STD $03
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screenCopyLoop:
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LDD $00,A
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STD $02
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DEC C
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JNZ screenCopyLoop
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RET
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