32 lines
641 B
Plaintext
32 lines
641 B
Plaintext
;
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; Exercise SUB/SUBN opcodes
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;
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; preload some values
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LD Va, 12
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LD Vb, 34
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LD Vc, 56
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LD Vd, 89
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LD Ve, ff
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LD V0, 24
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SUB V0, Va ; SUB Vx, Vy - no borrow
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LD V1, Vf
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LD V2, 45
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SUB V2, Vd ; SUB Vx, nn - borrow
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LD V3, Vf
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LD V4, 22
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SUBN V4, Vc ; SUBN Vx, Vy - no borrow
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LD V5, Vf
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LD V6, 56
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SUBN V6, Vb ; SUBN Vx, Vy - borrow
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LD V7, Vf
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; TODO: Check corner case where one of the operands is Vf
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EXIT
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