| Age | Commit message (Collapse) | Author |
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Now, the unofficial opcodes can be implemented, and then the PPU and
APU.
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Also improve logging.
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https://old.reddit.com/r/EmuDev/comments/15plfes/having_an_issue_with_nestest_on_my_6502_emulator/jvyck7k/
With this, it seems that all official opcodes run as nestest expects.
Now, it's the unofficial opcodes that need to be implemented.
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Perhaps a refactor is in order for the arguments to the opcodes.
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JSR was pushing 1 too high PC and RTS was 1 too low
RTI was only pulling the low byte of PC
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It seems that is what was expected when run with nestest.
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The stack's PUSH and PULL weren't proper and JSR was reading wrong
argument it seems.
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So this is why tests should be written while writing the program
and instructions instead of all at once later. If this were all to be
rewritten (which it probably will), I should add tests for each opcode
instead of waiting until the end for ROM loading support.
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It seems like the test ROM loads fine but the instructions are not,
but that's exactly what the test ROM is for I suppose.
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They're both the same and the compiler might have already optimized it
away. It also conveys the message better in my opinion.
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Of course all of these opcodes need to be tested later...
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The JSON is from https://github.com/ericTheEchidna/65C02-JSON/ and
saved me a lot of time from writing the cases for each opcode by hand.
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