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feat(apu): implement all apu i/o writes

This commit is contained in:
Rekai Nyangadzayi Musuka 2022-10-30 02:02:23 -03:00
parent 13710a3236
commit 1d163fa56f
2 changed files with 71 additions and 53 deletions
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122
src/core/apu.zig
View File

@ -12,9 +12,8 @@ const Noise = @import("apu/Noise.zig");
const SoundFifo = std.fifo.LinearFifo(u8, .{ .Static = 0x20 });
const setHi = util.setHi;
const setLo = util.setLo;
const shift = util.shift;
const getHalf = util.shift;
const setHalf = util.setHalf;
const intToBytes = util.intToBytes;
const log = std.log.scoped(.APU);
@ -23,10 +22,10 @@ pub const host_rate = @import("../platform.zig").sample_rate;
pub const host_format = @import("../platform.zig").sample_format;
pub fn read(comptime T: type, apu: *const Apu, addr: u32) ?T {
const byte = @truncate(u8, addr);
const byte_addr = @truncate(u8, addr);
return switch (T) {
u32 => switch (byte) {
u32 => switch (byte_addr) {
0x60 => @as(T, apu.ch1.sound1CntH()) << 16 | apu.ch1.sound1CntL(),
0x64 => apu.ch1.sound1CntX(),
0x68 => apu.ch2.sound2CntL(),
@ -39,12 +38,12 @@ pub fn read(comptime T: type, apu: *const Apu, addr: u32) ?T {
0x84 => apu.soundCntX(),
0x88 => apu.bias.raw, // SOUNDBIAS, high is unused
0x8C => null,
0x90, 0x94, 0x8, 0x9C => apu.ch3.wave_dev.read(T, apu.ch3.select, addr),
0x90, 0x94, 0x98, 0x9C => apu.ch3.wave_dev.read(T, apu.ch3.select, addr),
0xA0 => null, // FIFO_A
0xA4 => null, // FIFO_B
else => util.io.read.err(T, log, "unaligned {} read from 0x{X:0>8}", .{ T, addr }),
},
u16 => switch (byte) {
u16 => switch (byte_addr) {
0x60 => apu.ch1.sound1CntL(),
0x62 => apu.ch1.sound1CntH(),
0x64 => apu.ch1.sound1CntX(),
@ -73,28 +72,28 @@ pub fn read(comptime T: type, apu: *const Apu, addr: u32) ?T {
0xA4, 0xA6 => null, // FIFO_B
else => util.io.read.err(T, log, "unaligned {} read from 0x{X:0>8}", .{ T, addr }),
},
u8 => switch (byte) {
0x60, 0x61 => @truncate(T, @as(u16, apu.ch1.sound1CntL()) >> shift(byte)),
0x62, 0x63 => @truncate(T, apu.ch1.sound1CntH() >> shift(byte)),
0x64, 0x65 => @truncate(T, apu.ch1.sound1CntX() >> shift(byte)),
u8 => switch (byte_addr) {
0x60, 0x61 => @truncate(T, @as(u16, apu.ch1.sound1CntL()) >> getHalf(byte_addr)),
0x62, 0x63 => @truncate(T, apu.ch1.sound1CntH() >> getHalf(byte_addr)),
0x64, 0x65 => @truncate(T, apu.ch1.sound1CntX() >> getHalf(byte_addr)),
0x66, 0x67 => 0x00, // assuming behaviour is identical to that of 16-bit reads
0x68, 0x69 => @truncate(T, apu.ch2.sound2CntL() >> shift(byte)),
0x68, 0x69 => @truncate(T, apu.ch2.sound2CntL() >> getHalf(byte_addr)),
0x6A, 0x6B => 0x00,
0x6C, 0x6D => @truncate(T, apu.ch2.sound2CntH() >> shift(byte)),
0x6C, 0x6D => @truncate(T, apu.ch2.sound2CntH() >> getHalf(byte_addr)),
0x6E, 0x6F => 0x00,
0x70, 0x71 => @truncate(T, @as(u16, apu.ch3.sound3CntL()) >> shift(byte)), // SOUND3CNT_L
0x72, 0x73 => @truncate(T, apu.ch3.sound3CntH() >> shift(byte)),
0x74, 0x75 => @truncate(T, apu.ch3.sound3CntX() >> shift(byte)), // SOUND3CNT_L
0x70, 0x71 => @truncate(T, @as(u16, apu.ch3.sound3CntL()) >> getHalf(byte_addr)), // SOUND3CNT_L
0x72, 0x73 => @truncate(T, apu.ch3.sound3CntH() >> getHalf(byte_addr)),
0x74, 0x75 => @truncate(T, apu.ch3.sound3CntX() >> getHalf(byte_addr)), // SOUND3CNT_L
0x76, 0x77 => 0x00,
0x78, 0x79 => @truncate(T, apu.ch4.sound4CntL() >> shift(byte)),
0x78, 0x79 => @truncate(T, apu.ch4.sound4CntL() >> getHalf(byte_addr)),
0x7A, 0x7B => 0x00,
0x7C, 0x7D => @truncate(T, apu.ch4.sound4CntH() >> shift(byte)),
0x7C, 0x7D => @truncate(T, apu.ch4.sound4CntH() >> getHalf(byte_addr)),
0x7E, 0x7F => 0x00,
0x80, 0x81 => @truncate(T, apu.soundCntL() >> shift(byte)), // SOUNDCNT_L
0x82, 0x83 => @truncate(T, apu.soundCntH() >> shift(byte)), // SOUNDCNT_H
0x84, 0x85 => @truncate(T, @as(u16, apu.soundCntX()) >> shift(byte)),
0x80, 0x81 => @truncate(T, apu.soundCntL() >> getHalf(byte_addr)), // SOUNDCNT_L
0x82, 0x83 => @truncate(T, apu.soundCntH() >> getHalf(byte_addr)), // SOUNDCNT_H
0x84, 0x85 => @truncate(T, @as(u16, apu.soundCntX()) >> getHalf(byte_addr)),
0x86, 0x87 => 0x00,
0x88, 0x89 => @truncate(T, apu.bias.raw >> shift(byte)), // SOUNDBIAS
0x88, 0x89 => @truncate(T, apu.bias.raw >> getHalf(byte_addr)), // SOUNDBIAS
0x8A, 0x8B => 0x00,
0x8C...0x8F => null,
0x90...0x9F => apu.ch3.wave_dev.read(T, apu.ch3.select, addr),
@ -107,79 +106,107 @@ pub fn read(comptime T: type, apu: *const Apu, addr: u32) ?T {
}
pub fn write(comptime T: type, apu: *Apu, addr: u32, value: T) void {
const byte = @truncate(u8, addr);
const byte_addr = @truncate(u8, addr);
switch (T) {
u32 => switch (byte) {
u32 => switch (byte_addr) {
0x60 => apu.ch1.setSound1Cnt(value),
0x64 => apu.ch1.setSound1CntX(&apu.fs, @truncate(u16, value)),
0x68 => apu.ch2.setSound2CntL(@truncate(u16, value)),
0x6C => apu.ch2.setSound2CntH(&apu.fs, @truncate(u16, value)),
0x70 => apu.ch3.setSound3Cnt(value),
0x74 => apu.ch3.setSound3CntX(&apu.fs, @truncate(u16, value)),
0x78 => apu.ch4.setSound4CntL(@truncate(u16, value)),
0x7C => apu.ch4.setSound4CntH(&apu.fs, @truncate(u16, value)),
0x80 => apu.setSoundCnt(value),
// WAVE_RAM
0x90...0x9F => apu.ch3.wave_dev.write(T, apu.ch3.select, addr, value),
0x84 => apu.setSoundCntX(value >> 7 & 1 == 1),
0x88 => apu.bias.raw = @truncate(u16, value),
0x8C => {},
0x90, 0x94, 0x98, 0x9C => apu.ch3.wave_dev.write(T, apu.ch3.select, addr, value),
0xA0 => apu.chA.push(value), // FIFO_A
0xA4 => apu.chB.push(value), // FIFO_B
else => util.io.write.undef(log, "Tried to write 0x{X:0>8}{} to 0x{X:0>8}", .{ value, T, addr }),
},
u16 => switch (byte) {
u16 => switch (byte_addr) {
0x60 => apu.ch1.setSound1CntL(@truncate(u8, value)), // SOUND1CNT_L
0x62 => apu.ch1.setSound1CntH(value),
0x64 => apu.ch1.setSound1CntX(&apu.fs, value),
0x66 => {},
0x68 => apu.ch2.setSound2CntL(value),
0x6A => {},
0x6C => apu.ch2.setSound2CntH(&apu.fs, value),
0x6E => {},
0x70 => apu.ch3.setSound3CntL(@truncate(u8, value)),
0x72 => apu.ch3.setSound3CntH(value),
0x74 => apu.ch3.setSound3CntX(&apu.fs, value),
0x76 => {},
0x78 => apu.ch4.setSound4CntL(value),
0x7A => {},
0x7C => apu.ch4.setSound4CntH(&apu.fs, value),
0x7E => {},
0x80 => apu.psg_cnt.raw = value, // SOUNDCNT_L
0x80 => apu.setSoundCntL(value),
0x82 => apu.setSoundCntH(value),
0x84 => apu.setSoundCntX(value >> 7 & 1 == 1),
0x86 => {},
0x88 => apu.bias.raw = value, // SOUNDBIAS
// WAVE_RAM
0x90...0x9F => apu.ch3.wave_dev.write(T, apu.ch3.select, addr, value),
0x8A, 0x8C, 0x8E => {},
0x90, 0x92, 0x94, 0x96, 0x98, 0x9A, 0x9C, 0x9E => apu.ch3.wave_dev.write(T, apu.ch3.select, addr, value),
0xA0, 0xA2 => log.err("Tried to write 0x{X:0>4}{} to FIFO_A", .{ value, T }),
0xA4, 0xA6 => log.err("Tried to write 0x{X:0>4}{} to FIFO_B", .{ value, T }),
else => util.io.write.undef(log, "Tried to write 0x{X:0>4}{} to 0x{X:0>8}", .{ value, T, addr }),
},
u8 => switch (byte) {
u8 => switch (byte_addr) {
0x60 => apu.ch1.setSound1CntL(value),
0x61 => {},
0x62 => apu.ch1.setNr11(value),
0x63 => apu.ch1.setNr12(value),
0x64 => apu.ch1.setNr13(value),
0x65 => apu.ch1.setNr14(&apu.fs, value),
0x66, 0x67 => {},
0x68 => apu.ch2.setNr21(value),
0x69 => apu.ch2.setNr22(value),
0x6A, 0x6B => {},
0x6C => apu.ch2.setNr23(value),
0x6D => apu.ch2.setNr24(&apu.fs, value),
0x6E, 0x6F => {},
0x70 => apu.ch3.setSound3CntL(value), // NR30
0x71 => {},
0x72 => apu.ch3.setNr31(value),
0x73 => apu.ch3.vol.raw = value, // NR32
0x74 => apu.ch3.setNr33(value),
0x75 => apu.ch3.setNr34(&apu.fs, value),
0x76, 0x77 => {},
0x78 => apu.ch4.setNr41(value),
0x79 => apu.ch4.setNr42(value),
0x7A, 0x7B => {},
0x7C => apu.ch4.poly.raw = value, // NR 43
0x7D => apu.ch4.setNr44(&apu.fs, value),
0x7E, 0x7F => {},
0x80, 0x81 => apu.setSoundCntL(setHalf(u16, apu.psg_cnt.raw, byte_addr, value)),
0x82, 0x83 => apu.setSoundCntH(setHalf(u16, apu.dma_cnt.raw, byte_addr, value)),
0x84 => apu.setSoundCntX(value >> 7 & 1 == 1),
0x85 => {},
0x86, 0x87 => {},
0x88, 0x89 => apu.bias.raw = setHalf(u16, apu.bias.raw, byte_addr, value), // SOUNDBIAS
0x8A...0x8F => {},
0x80 => apu.setNr50(value),
0x81 => apu.setNr51(value),
0x82 => apu.setSoundCntH(setLo(u16, apu.dma_cnt.raw, value)),
0x83 => apu.setSoundCntH(setHi(u16, apu.dma_cnt.raw, 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),
0xA0...0xA3 => log.err("Tried to write 0x{X:0>2}{} to FIFO_A", .{ value, T }),
0xA4...0xA7 => log.err("Tried to write 0x{X:0>2}{} to FIFO_B", .{ value, T }),
else => util.io.write.undef(log, "Tried to write 0x{X:0>2}{} to 0x{X:0>8}", .{ value, T, addr }),
},
else => @compileError("APU: Unsupported write width"),
@ -256,7 +283,7 @@ pub const Apu = struct {
/// SOUNDCNT
fn setSoundCnt(self: *Self, value: u32) void {
self.psg_cnt.raw = @truncate(u16, value);
self.setSoundCntL(@truncate(u16, value));
self.setSoundCntH(@truncate(u16, value >> 16));
}
@ -265,6 +292,11 @@ pub const Apu = struct {
return self.psg_cnt.raw & 0xFF77;
}
/// SOUNDCNT_L
pub fn setSoundCntL(self: *Self, value: u16) void {
self.psg_cnt.raw = value;
}
/// SOUNDCNT_H
pub fn setSoundCntH(self: *Self, value: u16) void {
const new: io.DmaSoundControl = .{ .raw = value };
@ -312,20 +344,6 @@ pub const Apu = struct {
return apu_enable << 7 | ch4_enable << 3 | ch3_enable << 2 | ch2_enable << 1 | ch1_enable;
}
/// NR50
pub fn setNr50(self: *Self, byte: u8) void {
self.psg_cnt.raw = (self.psg_cnt.raw & 0xFF00) | byte;
}
/// NR51
pub fn setNr51(self: *Self, byte: u8) void {
self.psg_cnt.raw = @as(u16, byte) << 8 | (self.psg_cnt.raw & 0xFF);
}
pub fn setSoundBiasH(self: *Self, byte: u8) void {
self.bias.raw = (@as(u16, byte) << 8) | (self.bias.raw & 0xFF);
}
pub fn sampleAudio(self: *Self, late: u64) void {
self.sched.push(.SampleAudio, self.interval() -| late);

2
src/core/bus/io.zig
View File

@ -179,7 +179,7 @@ pub fn write(bus: *Bus, comptime T: type, address: u32, value: T) void {
0x0400_0056 => {}, // Not used
// Sound
0x0400_0060...0x0400_009E => apu.write(T, &bus.apu, address, value),
0x0400_0060...0x0400_00A6 => apu.write(T, &bus.apu, address, value),
// Dma Transfers
0x0400_00B0...0x0400_00DE => dma.write(T, &bus.dma, address, value),