[SIM65] Support undocumented opcodes for 6502

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This PR is mostly a complete rewrite of the emulator for 6502/65c02 opcodes.
It provides an easier to maintain implementation of the instructions, by using few macros rather than having hand-written code for each function.
All undocumented, previously missing opcodes for 6502 are also implemented.
The patch also includes a detailed documentation of those opcodes, for reference to developers.
This PR should fix one of the milestones listed here for the next version of CC65:

https://github.com/cc65/wiki/wiki/Before-the-next-release

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Carlo Bramini

2024-01-04 13:12:52 +01:00

committed by Carlo Bramini

parent 75461e1319

commit b04d79b1da

5 changed files with 1805 additions and 925 deletions

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src/sim65/6502.c

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