6502 Emulator

Some time ago, I decided to create a CPU emulator in order to better understand how these work.

This emulator is built as a C library.

Using the library

1. Include the emulator header

#include "6502_emulator.h"

2. Initialize the library

cpu_library_init();

3. Create and set the CPU's IO functions

cpu_read_byte = read_byte;
cpu_write_byte = write_byte;

4. Reset the CPU

cpu_reset();

5. Make the CPU run

while(1) {
    cpu_clock();
}

Resources

• This website contains information about architecture, registers, instructions and addressing modes.
• I also used some of the information present in this book to make sure that the emulator behaves correctly.