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Document the DAA instruction behavior #1562

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Rangi42 opened this issue Nov 25, 2024 · 0 comments
Open

Document the DAA instruction behavior #1562

Rangi42 opened this issue Nov 25, 2024 · 0 comments
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docs This affects the documentation (web-specific issues go to rgbds-www) rgbasm This affects RGBASM
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v0.9.0

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@Rangi42
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Rangi42 commented Nov 25, 2024

We already describe the nontrivial HALT instruction behavior, #1561 links to Pan Docs for STOP, we illustrate the BIT/RES/SET instructions, and clarify a few others. But DAA is just described as "Decimal Adjust Accumulator to get a correct BCD representation after an arithmetic instruction." Given how many online guides there are to this instruction on various platforms (1, 2, 3, 4, etc), there's clear demand for an explanation. It would also be a chance to note that the N and H flags aren't completely pointless.
@Rangi42 Rangi42 added docs This affects the documentation (web-specific issues go to rgbds-www) rgbasm This affects RGBASM labels Nov 25, 2024
@Rangi42 Rangi42 added this to the v0.9.0 milestone Nov 25, 2024
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docs This affects the documentation (web-specific issues go to rgbds-www) rgbasm This affects RGBASM
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