main.rs

use chip_ahoyto::chip8::Chip8;
use std::{fs::File, io::Read};
use time::Instant;

const CYCLE_COUNT: u64 = 10_000_000_000;

fn main() {
    let rom = read_file("./resources/pong.ch8");

    let mut chip8 = Chip8::new();
    chip8.reset_hard();
    chip8.load_rom(&rom);

    let instant = Instant::now();

    let cycles = CYCLE_COUNT;

    println!("Running {} cycles", cycles);

    for _ in 0..CYCLE_COUNT {
        chip8.tick();
    }

    let duration_s = instant.elapsed().as_seconds_f32();
    let cycles_second = cycles as f32 / duration_s;
    let mega_second = cycles_second / 1000.0 / 1000.0;

    println!("Took {} seconds or {:.2} MHz CPU", duration_s, mega_second);
}

fn read_file(path: &str) -> Vec<u8> {
    let mut file = File::open(path).unwrap();
    let mut data = Vec::new();
    file.read_to_end(&mut data).unwrap();
    data
}