mirror of https://github.com/makarcz/vm6502.git
25 lines
1.0 KiB
Plaintext
25 lines
1.0 KiB
Plaintext
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http://visual6502.org/wiki/index.php?title=6502DecimalMode
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NV-BDIZC
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Tests for ADC
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00 + 00 and C=0 gives 00 and N=0 V=0 Z=1 C=0 (simulate)
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79 + 00 and C=1 gives 80 and N=1 V=1 Z=0 C=0 (simulate)
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24 + 56 and C=0 gives 80 and N=1 V=1 Z=0 C=0 (simulate)
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93 + 82 and C=0 gives 75 and N=0 V=1 Z=0 C=1 (simulate)
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89 + 76 and C=0 gives 65 and N=0 V=0 Z=0 C=1 (simulate)
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89 + 76 and C=1 gives 66 and N=0 V=0 Z=1 C=1 (simulate)
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80 + f0 and C=0 gives d0 and N=0 V=1 Z=0 C=1 (simulate)
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80 + fa and C=0 gives e0 and N=1 V=0 Z=0 C=1 (simulate)
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2f + 4f and C=0 gives 74 and N=0 V=0 Z=0 C=0 (simulate)
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6f + 00 and C=1 gives 76 and N=0 V=0 Z=0 C=0 (simulate)
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Tests for SBC
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00 - 00 and C=0 gives 99 and N=1 V=0 Z=0 C=0 (simulate)
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00 - 00 and C=1 gives 00 and N=0 V=0 Z=1 C=1 (simulate)
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00 - 01 and C=1 gives 99 and N=1 V=0 Z=0 C=0 (simulate)
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0a - 00 and C=1 gives 0a and N=0 V=0 Z=0 C=1 (simulate)
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0b - 00 and C=0 gives 0a and N=0 V=0 Z=0 C=1 (simulate)
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9a - 00 and C=1 gives 9a and N=1 V=0 Z=0 C=1 (simulate)
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9b - 00 and C=0 gives 9a and N=1 V=0 Z=0 C=1 (simulate) |