If you want to play around with those opcodes on a netlist simulation of the 6502, may I recommend: https://floooh.github.io/visual6502remix/ https://floooh.gi

If you want to play around with those opcodes on a netlist simulation of the 6502, may I recommend: https://floooh.github.io/visual6502remix/ https://floooh.github.io/visual6502remix/ ...which is essentially a WASM version of the famous visual6502.org with a couple more features (like an integrated assembler): http://www.visual6502.org/JSSim/index.html http://www.visual6502.org/JSSim/index.html (check out Help => About for credits) Unfortunately the assembler I used (ASMX) doesn't seem to support the illegal opcodes, so you need to enter the opcodes as hex values directly into the memory tab (the disassembler window recognizes the opcodes though).