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e4a4a9800d
It's a bit more inconvenient in terms of register protection (BC is much more generally useful than IY), but it makes tight spots such as next and execute much faster, so I think it's worth it.
16 lines
356 B
Plaintext
16 lines
356 B
Plaintext
CODE (br)
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L1 BSET ( used in ?br and loop )
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PC ORG @ 0x3d + ! ( stable ABI JP )
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LDA(BC), H 0 LDri, L A LDrr,
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RLA, IFC, H DECr, THEN,
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BC ADDHLd, B H LDrr, C L LDrr,
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;CODE
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CODE (?br)
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PC ORG @ 0x41 + ! ( stable ABI JP )
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HL POP,
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HLZ,
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JRZ, L1 BWR ( br + 1. False, branch )
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( True, skip next byte and don't branch )
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BC INCd,
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;CODE
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