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fix: implement register reads for Yoshi's Island

This commit is contained in:
Rekai Nyangadzayi Musuka 2022-06-16 02:32:31 -03:00
parent f5e401a4ee
commit cc8c1c1e21
2 changed files with 17 additions and 0 deletions
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16
src/apu.zig
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@ -42,7 +42,9 @@ pub fn read(comptime T: type, apu: *const Apu, addr: u32) T {
},
u8 => switch (byte) {
0x60 => apu.ch1.getSoundCntL(), // NR10
0x62 => apu.ch1.duty.raw, // NR11
0x63 => apu.ch1.envelope.raw, // NR12
0x68 => apu.ch2.duty.raw, // NR21
0x69 => apu.ch2.envelope.raw, // NR22
0x73 => apu.ch3.vol.raw, // NR32
0x79 => apu.ch4.envelope.raw, // NR42
@ -120,6 +122,8 @@ pub fn write(comptime T: type, apu: *Apu, addr: u32, value: T) void {
0x80 => apu.setNr50(value),
0x81 => apu.setNr51(value),
0x82 => apu.setSoundCntHL(value),
0x83 => apu.setSoundCntHH(value),
0x84 => apu.setSoundCntX(value >> 7 & 1 == 1), // NR52
0x89 => apu.setSoundBiasH(value),
0x90...0x9F => apu.ch3.wave_dev.write(T, apu.ch3.select, addr, value),
@ -192,6 +196,18 @@ pub const Apu = struct {
self.ch4.reset();
}
/// SOUNDCNT_H_L
fn setSoundCntHL(self: *Self, value: u8) void {
const merged = (self.dma_cnt.raw & 0xFF00) | value;
self.setSoundCntH(merged);
}
/// SOUNDCNT_H_H
fn setSoundCntHH(self: *Self, value: u8) void {
const merged = (self.dma_cnt.raw & 0x00FF) | (@as(u16, value) << 8);
self.setSoundCntH(merged);
}
pub fn setSoundCntH(self: *Self, value: u16) void {
const new: io.DmaSoundControl = .{ .raw = value };

1
src/bus/io.zig
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@ -296,6 +296,7 @@ pub fn write(bus: *Bus, comptime T: type, address: u32, value: T) void {
0x0400_000A => bus.ppu.bg[1].cnt.raw = (bus.ppu.bg[1].cnt.raw & 0xFF00) | value,
0x0400_000B => bus.ppu.bg[1].cnt.raw = (@as(u16, value) << 8) | (bus.ppu.bg[1].cnt.raw & 0xFF),
0x0400_0048 => log.debug("Wrote 0x{X:0>2} to WININ_L", .{value}),
0x0400_0049 => log.debug("Wrote 0x{X:0>2} to WININ_H", .{value}),
0x0400_004A => log.debug("Wrote 0x{X:0>2} to WINOUT_L", .{value}),
0x0400_0054 => log.debug("Wrote 0x{X:0>2} to BLDY_L", .{value}),