mos6502

An emulator for the MOS 6502 CPU written in Rust.
This started off as a fork of amw-zero/6502-rs, which seems to be unmaintained at this point.

It builds with the latest stable Rust and supports #[no_std] targets.

Usage example

```rust extern crate mos6502; use mos6502::address::Address; use mos6502::cpu;

fn main() {

let zero_page_data = [56, 49];

let program = [
// (F)irst | (S)econd
// .algo
    0xa5, 0x00,       // Load from F to A
// .algo_
    0x38,             // Set carry flag
    0xe5, 0x01,       // Substract S from number in A (from F)
    0xf0, 0x07,       // Jump to .end if diff is zero
    0x30, 0x08,       // Jump to .swap if diff is negative
    0x85, 0x00,       // Load A to F
    0x4c, 0x12, 0x00, // Jump to .algo_
// .end
    0xa5, 0x00,       // Load from S to A
    0xff, 
// .swap
    0xa6, 0x00,       // load F to X
    0xa4, 0x01,       // load S to Y
    0x86, 0x01,       // Store X to F
    0x84, 0x00,       // Store Y to S
    0x4c, 0x10, 0x00, // Jump to .algo
];

let mut cpu = cpu::CPU::new();

cpu.memory.set_bytes(Address(0x00), &zero_page_data);
cpu.memory.set_bytes(Address(0x10), &program);
cpu.registers.program_counter = Address(0x10);

cpu.run();

assert_eq!(7, cpu.registers.accumulator);

} ```