boomlinde/6502

c89 zero dependency 6502 implementation

6502

unfinished 6502 implementation written in c89 with zero dependencies (no includes).

working

• good enough implementation to pass nestest
• decimal mode arithmetic (disabled by defining MOS6502_DISABLE_DECIMAL_MODE)

not working

• no interrupts

credits

nestest logs generated from Nintendulator: https://www.qmtpro.com/~nes/nintendulator/

sources for opcodes:

• https://www.masswerk.at/6502/6502_instruction_set.html

sources for unofficial opcodes:

• http://nesdev.com/undocumented_opcodes.txt

• https://wiki.nesdev.com/w/index.php/CPU_unofficial_opcodes

final

please consider giving credit if you use any code from this repo, even as a refrence (this is not required).