fix(apu): implement WAVE RAM blocking

2021-08-02 22:37:40 -05:00 · 2021-08-02 22:37:40 -05:00 · 832e1b7633
parent a549b9feef
commit 832e1b7633
1 changed files with 5 additions and 1 deletions
--- a/src/apu.rs
+++ b/src/apu.rs
@ -664,7 +664,11 @@ pub(crate) struct Channel3 {

 impl BusIo for Channel3 {
    fn read_byte(&self, addr: u16) -> u8 {
-        self.wave_ram[(addr - Self::WAVE_RAM_START_ADDR) as usize]
+        if self.enabled {
+            self.wave_ram[self.offset as usize]
+        } else {
+            self.wave_ram[(addr - Self::WAVE_RAM_START_ADDR) as usize]
+        }
    }

    fn write_byte(&mut self, addr: u16, byte: u8) {