feat(apu): impelement all apu i/o reads
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647bd83224
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@ -12,9 +12,10 @@ const Noise = @import("apu/Noise.zig");
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const SoundFifo = std.fifo.LinearFifo(u8, .{ .Static = 0x20 });
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const intToBytes = @import("../util.zig").intToBytes;
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const setHi = @import("../util.zig").setHi;
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const setLo = @import("../util.zig").setLo;
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const setHi = util.setHi;
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const setLo = util.setLo;
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const shift = util.shift;
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const intToBytes = util.intToBytes;
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const log = std.log.scoped(.APU);
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@ -25,42 +26,80 @@ pub fn read(comptime T: type, apu: *const Apu, addr: u32) ?T {
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const byte = @truncate(u8, addr);
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return switch (T) {
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u32 => switch (byte) {
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0x60 => @as(T, apu.ch1.sound1CntH()) << 16 | apu.ch1.sound1CntL(),
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0x64 => apu.ch1.sound1CntX(),
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0x68 => apu.ch2.sound2CntL(),
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0x6C => apu.ch2.sound2CntH(),
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0x70 => @as(T, apu.ch3.sound3CntH()) << 16 | apu.ch3.sound3CntL(),
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0x74 => apu.ch3.sound3CntX(),
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0x78 => apu.ch4.sound4CntL(),
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0x7C => apu.ch4.sound4CntH(),
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0x80 => @as(T, apu.dma_cnt.raw) << 16 | apu.psg_cnt.raw, // SOUNDCNT_H, SOUNDCNT_L
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0x84 => apu.soundCntX(),
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0x88 => apu.bias.raw, // SOUNDBIAS, high is unused
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0x8C => null,
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0x90, 0x94, 0x8, 0x9C => apu.ch3.wave_dev.read(T, apu.ch3.select, addr),
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0xA0 => null, // FIFO_A
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0xA4 => null, // FIFO_B
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else => util.io.read.err(T, log, "unaligned {} read from 0x{X:0>8}", .{ T, addr }),
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},
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u16 => switch (byte) {
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0x60 => apu.ch1.sound1CntL(),
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0x62 => apu.ch1.sound1CntH(),
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0x64 => apu.ch1.sound1CntX(),
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0x66 => null,
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0x68 => apu.ch2.sound2CntL(),
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0x6A => null,
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0x6C => apu.ch2.sound2CntH(),
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0x70 => apu.ch3.select.raw & 0xE0, // SOUND3CNT_L
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0x6E => null,
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0x70 => apu.ch3.sound3CntL(),
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0x72 => apu.ch3.sound3CntH(),
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0x74 => apu.ch3.freq.raw & 0x4000, // SOUND3CNT_X
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0x74 => apu.ch3.sound3CntX(),
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0x76 => null,
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0x78 => apu.ch4.sound4CntL(),
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0x7A => null,
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0x7C => apu.ch4.sound4CntH(),
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0x80 => apu.psg_cnt.raw & 0xFF77, // SOUNDCNT_L
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0x82 => apu.dma_cnt.raw & 0x770F, // SOUNDCNT_H
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0x7E => null,
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0x80 => apu.soundCntL(),
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0x82 => apu.soundCntH(),
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0x84 => apu.soundCntX(),
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0x86 => null,
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0x88 => apu.bias.raw, // SOUNDBIAS
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0x90...0x9F => apu.ch3.wave_dev.read(T, apu.ch3.select, addr),
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else => util.io.read.undef(T, log, "Tried to perform a {} read to 0x{X:0>8}", .{ T, addr }),
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0x8A, 0x8C, 0x8E => null,
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0x90, 0x92, 0x94, 0x96, 0x98, 0x9A, 0x9C, 0x9E => apu.ch3.wave_dev.read(T, apu.ch3.select, addr),
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0xA0, 0xA2 => null, // FIFO_A
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0xA4, 0xA6 => null, // FIFO_B
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else => util.io.read.err(T, log, "unaligned {} read from 0x{X:0>8}", .{ T, addr }),
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},
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u8 => switch (byte) {
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0x60 => apu.ch1.sound1CntL(), // NR10
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0x62 => apu.ch1.duty.raw, // NR11
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0x63 => apu.ch1.envelope.raw, // NR12
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0x68 => apu.ch2.duty.raw, // NR21
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0x69 => apu.ch2.envelope.raw, // NR22
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0x73 => apu.ch3.vol.raw, // NR32
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0x79 => apu.ch4.envelope.raw, // NR42
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0x7C => apu.ch4.poly.raw, // NR43
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0x81 => @truncate(u8, apu.psg_cnt.raw >> 8), // NR51
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0x84 => apu.soundCntX(),
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0x89 => @truncate(u8, apu.bias.raw >> 8), // SOUNDBIAS_H
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else => util.io.read.undef(T, log, "Tried to perform a {} read to 0x{X:0>8}", .{ T, addr }),
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0x60, 0x61 => @truncate(T, @as(u16, apu.ch1.sound1CntL()) >> shift(byte)),
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0x62, 0x63 => @truncate(T, apu.ch1.sound1CntH() >> shift(byte)),
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0x64, 0x65 => @truncate(T, apu.ch1.sound1CntX() >> shift(byte)),
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0x66, 0x67 => null,
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0x68, 0x69 => @truncate(T, apu.ch2.sound2CntL() >> shift(byte)),
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0x6A, 0x6B => null,
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0x6C, 0x6D => @truncate(T, apu.ch2.sound2CntH() >> shift(byte)),
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0x6E, 0x6F => null,
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0x70, 0x71 => @truncate(T, @as(u16, apu.ch3.sound3CntL()) >> shift(byte)), // SOUND3CNT_L
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0x72, 0x73 => @truncate(T, apu.ch3.sound3CntH() >> shift(byte)),
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0x74, 0x75 => @truncate(T, apu.ch3.sound3CntX() >> shift(byte)), // SOUND3CNT_L
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0x76, 0x77 => null,
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0x78, 0x79 => @truncate(T, apu.ch4.sound4CntL() >> shift(byte)),
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0x7A, 0x7B => null,
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0x7C, 0x7D => @truncate(T, apu.ch4.sound4CntH() >> shift(byte)),
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0x7E, 0x7F => null,
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0x80, 0x81 => @truncate(T, apu.soundCntL() >> shift(byte)), // SOUNDCNT_L
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0x82, 0x83 => @truncate(T, apu.soundCntH() >> shift(byte)), // SOUNDCNT_H
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0x84, 0x85 => @truncate(T, @as(u16, apu.soundCntX()) >> shift(byte)),
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0x86, 0x87 => null,
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0x88, 0x89 => @truncate(T, apu.bias.raw >> shift(byte)), // SOUNDBIAS
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0x8A...0x8F => null,
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0x90...0x9F => apu.ch3.wave_dev.read(T, apu.ch3.select, addr),
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0xA0, 0xA1, 0xA2, 0xA3 => null, // FIFO_A
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0xA4, 0xA5, 0xA6, 0xA7 => null, // FIFO_B
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else => util.io.read.err(T, log, "unexpected {} read from 0x{X:0>8}", .{ T, addr }),
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},
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u32 => util.io.read.undef(T, log, "Tried to perform a {} read to 0x{X:0>8}", .{ T, addr }),
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else => @compileError("APU: Unsupported read width"),
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};
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}
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@ -219,6 +258,11 @@ pub const Apu = struct {
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self.setSoundCntH(@truncate(u16, value >> 16));
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}
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/// SOUNDCNT_L
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pub fn soundCntL(self: *const Self) u16 {
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return self.psg_cnt.raw & 0xFF77;
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}
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/// SOUNDCNT_H
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pub fn setSoundCntH(self: *Self, value: u16) void {
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const new: io.DmaSoundControl = .{ .raw = value };
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@ -231,6 +275,11 @@ pub const Apu = struct {
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self.dma_cnt = new;
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}
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/// SOUNDCNT_H
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pub fn soundCntH(self: *const Self) u16 {
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return self.dma_cnt.raw & 0x770F;
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}
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/// NR52
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pub fn setSoundCntX(self: *Self, value: bool) void {
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self.cnt.apu_enable.write(value);
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@ -71,6 +71,11 @@ pub fn setSound3CntL(self: *Self, value: u8) void {
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if (!self.select.enabled.read()) self.enabled = false;
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}
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/// NR30
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pub fn sound3CntL(self: *const Self) u8 {
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return self.select.raw & 0xE0;
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}
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/// NR31, NR32
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pub fn sound3CntH(self: *const Self) u16 {
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return @as(u16, self.length & 0xE0) << 8;
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@ -94,6 +99,11 @@ pub fn setSound3CntX(self: *Self, fs: *const FrameSequencer, value: u16) void {
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self.setNr34(fs, @truncate(u8, value >> 8));
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}
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/// NR33, NR34
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pub fn sound3CntX(self: *const Self) u16 {
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return self.freq.raw & 0x4000;
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}
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/// NR33
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pub fn setNr33(self: *Self, byte: u8) void {
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self.freq.raw = (self.freq.raw & 0xFF00) | byte;
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@ -53,7 +53,7 @@ pub fn read(comptime T: type, dma: *const DmaTuple, addr: u32) ?T {
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0xD2, 0xD3 => @truncate(T, dma.*[2].cnt.raw >> shift(byte)),
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0xD4...0xDD => null, // DMA3SAD, DMA3DAD, DMA3CNT_L
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0xDE, 0xDF => @truncate(T, dma.*[3].cnt.raw >> shift(byte)),
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else => util.io.read.err(T, log, "unaligned {} read from 0x{X:0>8}", .{ T, addr }),
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else => util.io.read.err(T, log, "unexpected {} read from 0x{X:0>8}", .{ T, addr }),
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},
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else => @compileError("DMA: Unsupported read width"),
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};
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@ -45,6 +45,9 @@ pub fn read(bus: *const Bus, comptime T: type, address: u32) ?T {
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// Display
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0x0400_0000...0x0400_0054 => ppu.read(T, &bus.ppu, address),
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// Sound
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0x0400_0060...0x0400_00A4 => apu.read(T, &bus.apu, address),
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// DMA Transfers
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0x0400_00B0...0x0400_00DC => dma.read(T, &bus.dma, address),
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@ -70,7 +73,7 @@ pub fn read(bus: *const Bus, comptime T: type, address: u32) ?T {
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0x0400_0000...0x0400_0054 => ppu.read(T, &bus.ppu, address),
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// Sound
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0x0400_0060...0x0400_009E => apu.read(T, &bus.apu, address),
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0x0400_0060...0x0400_00A6 => apu.read(T, &bus.apu, address),
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// DMA Transfers
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0x0400_00B0...0x0400_00DE => dma.read(T, &bus.dma, address),
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@ -101,6 +104,12 @@ pub fn read(bus: *const Bus, comptime T: type, address: u32) ?T {
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// Sound
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0x0400_0060...0x0400_00A7 => apu.read(T, &bus.apu, address),
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// DMA Transfers
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0x0400_00B0...0x0400_00DE => dma.read(T, &bus.dma, address),
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// Timers
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0x0400_0100...0x0400_010E => timer.read(T, &bus.tim, address),
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// Serial Communication 1
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0x0400_0128 => util.io.read.todo(log, "Read {} from SIOCNT_L", .{T}),
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@ -76,7 +76,7 @@ pub fn read(comptime T: type, ppu: *const Ppu, addr: u32) ?T {
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0x50, 0x51 => @truncate(T, ppu.bldcnt.raw >> shift(byte)),
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0x52, 0x53 => @truncate(T, ppu.bldalpha.raw >> shift(byte)),
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0x54...0x55 => null, // BLDY
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else => util.io.read.err(T, log, "unaligned {} read from 0x{X:0>8}", .{ T, addr }),
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else => util.io.read.err(T, log, "unexpected {} read from 0x{X:0>8}", .{ T, addr }),
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},
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else => @compileError("PPU: Unsupported read width"),
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};
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