nesdoc

Some documentation about the NES (Nintendo Entertainment System).

This is the source code for my NES documentation at https://nes.syntaxerror.at/.

If you find any errors or want to contribute any improvements/changes/additions, feel free to create an issue or a pull request!

6502 CPU

In /static/data/ you can find several files:

• instructions.json and instructions.csv: a JSON/CSV file containing all the instructions of the 6502 with addressing mode, operation, cycles, and affected flags
• timings.json: a JSON file containing the timings and cycles of all addressing modes/ instructions of the 6502

Sources

• https://wiki.nesdev.org/w/index.php?title=CPU_addressing_modes
• https://www.nesdev.com/6502_cpu.txt
• http://www.oxyron.de/html/opcodes02.html
• https://www.masswerk.at/nowgobang/2021/6502-illegal-opcodes
• https://wiki.nesdev.org/w/index.php?title=CPU_unofficial_opcodes