path: root/src/memory.rs

#![allow(dead_code)]
use ppu::PPU;
use mos6502::CPU;
use cartridge::{MirrorType, Cartridge};
use controller::Controller;
use core::cell::{UnsafeCell, Cell};
use core::ptr::null_mut;

pub trait VMem {
    fn read(&self, addr: u16) -> u8;
    fn write(&self, addr: u16, data: u8);
}

pub struct CPUMemory<'a> {
    sram: UnsafeCell<[u8; 2048]>,
    ppu: Cell<*mut PPU<'a>>,
    cpu: Cell<*mut CPU<'a>>,
    mapper: &'a VMem,
    ctl1: Option<&'a Controller>,
    ctl2: Option<&'a Controller>
}

impl<'a> CPUMemory<'a> {
    pub fn new(ppu: &mut PPU<'a>,
               mapper: &'a VMem,
               ctl1: Option<&'a Controller>,
               ctl2: Option<&'a Controller>) -> Self {
        CPUMemory{sram: UnsafeCell::new([0; 2048]),
                  cpu: Cell::new(null_mut()),
                  ppu: Cell::new(ppu),
                  mapper, ctl1, ctl2}
    }

    pub fn init(&self, cpu: *mut CPU<'a>) {
        self.cpu.set(cpu);
    }
}

impl<'a> VMem for CPUMemory<'a> {
    fn read(&self, addr: u16) -> u8 {
        if addr < 0x2000 {
            </