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chore: implement I/O regsister for Minish Cap

This commit is contained in:
Rekai Nyangadzayi Musuka 2022-04-25 08:01:34 -05:00
parent 81db06d2fc
commit f4a48d536c
2 changed files with 7 additions and 6 deletions
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12
src/apu.zig
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@ -105,13 +105,13 @@ pub const Apu = struct {
} }
/// NR52 /// NR52
pub fn soundCntX(self: *const Self) u32 { pub fn soundCntX(self: *const Self) u8 {
const apu_enable = @boolToInt(self.cnt.apu_enable.read()); const apu_enable: u8 = @boolToInt(self.cnt.apu_enable.read());
const ch1_enable = @boolToInt(self.ch1.enabled); const ch1_enable: u8 = @boolToInt(self.ch1.enabled);
const ch2_enable = @boolToInt(self.ch2.enabled); const ch2_enable: u8 = @boolToInt(self.ch2.enabled);
const ch3_enable = @boolToInt(self.ch3.enabled); const ch3_enable: u8 = @boolToInt(self.ch3.enabled);
const ch4_enable = @boolToInt(self.ch4.enabled); const ch4_enable: u8 = @boolToInt(self.ch4.enabled);
return apu_enable << 7 | ch4_enable << 3 | ch3_enable << 2 | ch2_enable << 1 | ch1_enable; return apu_enable << 7 | ch4_enable << 3 | ch3_enable << 2 | ch2_enable << 1 | ch1_enable;
} }

1
src/bus/io.zig
View File

@ -124,6 +124,7 @@ pub fn read(bus: *const Bus, comptime T: type, address: u32) T {
0x0400_0079 => bus.apu.ch4.envelope.raw, 0x0400_0079 => bus.apu.ch4.envelope.raw,
0x0400_007C => bus.apu.ch4.poly.raw, 0x0400_007C => bus.apu.ch4.poly.raw,
0x0400_0081 => @truncate(T, bus.apu.psg_cnt.raw >> 8), 0x0400_0081 => @truncate(T, bus.apu.psg_cnt.raw >> 8),
0x0400_0084 => bus.apu.soundCntX(),
0x0400_0089 => @truncate(T, bus.apu.bias.raw >> 8), 0x0400_0089 => @truncate(T, bus.apu.bias.raw >> 8),
// Serial Communication 1 // Serial Communication 1