oam dma transfers

src/processor/memory.rs

@@ -6,6 +6,8 @@ use crate::{
 use minifb::Key;
 use std::io::{stdout, Write};
 
+use super::SplitRegister;
+
 pub(crate) mod rom;
 
 pub(crate) type Address = u16;
@@ -260,6 +262,17 @@ impl Memory {
                     // read-only addresses
                     println!("BANNED write: {:#X} to {:#X}", data, address);
                 }
+                0xFF46 => {
+                    if data > 0xDF {
+                        panic!("dma transfer out of bounds: {:#X}", data);
+                    }
+                    let mut addr: u16 = 0x0;
+                    addr.set_high(data);
+                    for l in 0x0..0xA0 {
+                        addr.set_low(l);
+                        self.oam[l as usize] = self.get(addr);
+                    }
+                }
                 _ => {
                     self.io[addr_l] = data;
                     // panic!("passed non-io address to io handler!");