6502sharp

MOS Technology 6502 CPU emulator library written in .NET Standard 2.0 and .NET Core 2.1. Both NMOS and CMOS variants inclued + all NMOS undocumented opcodes.

Features

• Full MOS Technology 6502 emulator
  • Both NMOS and CMOS variants
• Unit tests for complex instructions
  • Also includes one test ROM that tests the actual runtime
• 2 Sample applications using the library
  • AsmConsole
    • Runs simple games from http://6502asm.com/
  • ehBasic
    • Runs the Enhance BASIC ROM
    • Manual: http://www.sunrise-ev.com/photos/6502/EhBASIC-manual.pdf
• Higly customizable
  • Listen to events (OnTick, OnInstruction...)
  • Modify or add new instructions
  • Create custom memory logic
• Continuous Integration
  • Includes build and tests It tries to emulate the chip as closely as possible but it has some timing issues.

Performance

It's really slow

It can run simpler programs at full speed but overall it's not really usable in things like a NES emulator. It's more of a research project.