On: Show HN: MOS6502 in pure Lua running in WebAssembly

[NackerHughes]

How many layers of virtualisation do we need?

[djmips → NackerHughes]

Run it in a browser in Wine on a MAC?

[delduca → djmips]

None of them run in a browser powered by WebAssembly. I created a 2D engine in C++20 based on SDL, in which I can use Lua to create games. Then I thought, “I’ll make a NES emulator,” so I started with its CPU, the 6502.

[djmips → delduca]

Have you run https://github.com/Klaus2m5/6502_65C02_functional_tests ?

See also https://www.righto.com/2012/12/the-6502-overflow-flag-explai...

I also note that you have the same code copy/pasted in every ALU operation which might be better expressed in one location for maintenance reasons.

[delduca → djmips]

Good call out. Thank you! I will give a try.

[delduca → NackerHughes]

All of them :)