661 lines
23 KiB
Zig
661 lines
23 KiB
Zig
const std = @import("std");
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const builtin = @import("builtin");
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const timer = @import("timer.zig");
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const dma = @import("dma.zig");
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const apu = @import("../apu.zig");
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const util = @import("../../util.zig");
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const Bit = @import("bitfield").Bit;
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const Bitfield = @import("bitfield").Bitfield;
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const Bus = @import("../Bus.zig");
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const DmaController = @import("dma.zig").DmaController;
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const Scheduler = @import("../scheduler.zig").Scheduler;
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const log = std.log.scoped(.@"I/O");
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pub const Io = struct {
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const Self = @This();
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/// Read / Write
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ime: bool,
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ie: InterruptEnable,
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irq: InterruptRequest,
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postflg: PostFlag,
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haltcnt: HaltControl,
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keyinput: KeyInput,
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pub fn init() Self {
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return .{
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.ime = false,
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.ie = .{ .raw = 0x0000 },
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.irq = .{ .raw = 0x0000 },
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.keyinput = .{ .raw = 0x03FF },
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.postflg = .FirstBoot,
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.haltcnt = .Execute,
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};
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}
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fn setIrqs(self: *Io, word: u32) void {
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self.ie.raw = @truncate(u16, word);
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self.irq.raw &= ~@truncate(u16, word >> 16);
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}
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};
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pub fn read(bus: *const Bus, comptime T: type, address: u32) ?T {
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return switch (T) {
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u32 => switch (address) {
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// Display
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0x0400_0000 => bus.ppu.dispcnt.raw,
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0x0400_0004 => @as(T, bus.ppu.vcount.raw) << 16 | bus.ppu.dispstat.raw,
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0x0400_0006 => @as(T, bus.ppu.bg[0].cnt.raw) << 16 | bus.ppu.vcount.raw,
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// DMA Transfers
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0x0400_00B0...0x0400_00DC => dma.read(T, &bus.dma, address),
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// Timers
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0x0400_0100...0x0400_010C => 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 and SIOMLT_SEND", .{T}),
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// Keypad Input
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0x0400_0130 => util.io.read.todo(log, "Read {} from KEYINPUT", .{T}),
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// Serial Communication 2
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0x0400_0150 => util.io.read.todo(log, "Read {} from JOY_RECV", .{T}),
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// Interrupts
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0x0400_0200 => @as(T, bus.io.irq.raw) << 16 | bus.io.ie.raw,
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0x0400_0208 => @boolToInt(bus.io.ime),
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else => util.io.read.undef(T, log, "Tried to perform a {} read to 0x{X:0>8}", .{ T, address }),
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},
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u16 => switch (address) {
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// Display
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0x0400_0000 => bus.ppu.dispcnt.raw,
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0x0400_0004 => bus.ppu.dispstat.raw,
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0x0400_0006 => bus.ppu.vcount.raw,
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0x0400_0008 => bus.ppu.bg[0].cnt.raw,
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0x0400_000A => bus.ppu.bg[1].cnt.raw,
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0x0400_000C => bus.ppu.bg[2].cnt.raw,
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0x0400_000E => bus.ppu.bg[3].cnt.raw,
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0x0400_004C => util.io.read.todo(log, "Read {} from MOSAIC", .{T}),
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0x0400_0050 => bus.ppu.bldcnt.raw,
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0x0400_0052 => bus.ppu.bldalpha.raw,
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0x0400_0054 => bus.ppu.bldy.raw,
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// Sound
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0x0400_0060...0x0400_009E => 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", .{T}),
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// Keypad Input
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0x0400_0130 => bus.io.keyinput.raw,
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// Serial Communication 2
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0x0400_0134 => util.io.read.todo(log, "Read {} from RCNT", .{T}),
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// Interrupts
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0x0400_0200 => bus.io.ie.raw,
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0x0400_0202 => bus.io.irq.raw,
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0x0400_0204 => util.io.read.todo(log, "Read {} from WAITCNT", .{T}),
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0x0400_0208 => @boolToInt(bus.io.ime),
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else => util.io.read.undef(T, log, "Tried to perform a {} read to 0x{X:0>8}", .{ T, address }),
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},
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u8 => return switch (address) {
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// Display
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0x0400_0000 => @truncate(T, bus.ppu.dispcnt.raw),
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0x0400_0004 => @truncate(T, bus.ppu.dispstat.raw),
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0x0400_0005 => @truncate(T, bus.ppu.dispcnt.raw >> 8),
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0x0400_0006 => @truncate(T, bus.ppu.vcount.raw),
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0x0400_0008 => @truncate(T, bus.ppu.bg[0].cnt.raw),
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0x0400_0009 => @truncate(T, bus.ppu.bg[0].cnt.raw >> 8),
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0x0400_000A => @truncate(T, bus.ppu.bg[1].cnt.raw),
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0x0400_000B => @truncate(T, bus.ppu.bg[1].cnt.raw >> 8),
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// Sound
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0x0400_0060...0x0400_00A7 => apu.read(T, &bus.apu, 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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// Keypad Input
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0x0400_0130 => util.io.read.todo(log, "read {} from KEYINPUT_L", .{T}),
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// Serial Communication 2
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0x0400_0135 => util.io.read.todo(log, "Read {} from RCNT_H", .{T}),
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// Interrupts
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0x0400_0200 => @truncate(T, bus.io.ie.raw),
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0x0400_0300 => @enumToInt(bus.io.postflg),
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else => util.io.read.undef(T, log, "Tried to perform a {} read to 0x{X:0>8}", .{ T, address }),
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},
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else => @compileError("I/O: Unsupported read width"),
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};
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}
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pub fn write(bus: *Bus, comptime T: type, address: u32, value: T) void {
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return switch (T) {
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u32 => switch (address) {
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// Display
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0x0400_0000 => bus.ppu.dispcnt.raw = @truncate(u16, value),
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0x0400_0004 => {
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bus.ppu.dispstat.raw = @truncate(u16, value);
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bus.ppu.vcount.raw = @truncate(u16, value >> 16);
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},
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0x0400_0008 => bus.ppu.setAdjCnts(0, value),
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0x0400_000C => bus.ppu.setAdjCnts(2, value),
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0x0400_0010 => bus.ppu.setBgOffsets(0, value),
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0x0400_0014 => bus.ppu.setBgOffsets(1, value),
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0x0400_0018 => bus.ppu.setBgOffsets(2, value),
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0x0400_001C => bus.ppu.setBgOffsets(3, value),
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0x0400_0020 => bus.ppu.aff_bg[0].writePaPb(value),
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0x0400_0024 => bus.ppu.aff_bg[0].writePcPd(value),
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0x0400_0028 => bus.ppu.aff_bg[0].setX(bus.ppu.dispstat.vblank.read(), value),
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0x0400_002C => bus.ppu.aff_bg[0].setY(bus.ppu.dispstat.vblank.read(), value),
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0x0400_0030 => bus.ppu.aff_bg[1].writePaPb(value),
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0x0400_0034 => bus.ppu.aff_bg[1].writePcPd(value),
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0x0400_0038 => bus.ppu.aff_bg[1].setX(bus.ppu.dispstat.vblank.read(), value),
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0x0400_003C => bus.ppu.aff_bg[1].setY(bus.ppu.dispstat.vblank.read(), value),
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0x0400_0040 => bus.ppu.win.setH(value),
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0x0400_0044 => bus.ppu.win.setV(value),
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0x0400_0048 => bus.ppu.win.setIo(value),
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0x0400_004C => log.debug("Wrote 0x{X:0>8} to MOSAIC", .{value}),
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0x0400_0050 => {
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bus.ppu.bldcnt.raw = @truncate(u16, value);
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bus.ppu.bldalpha.raw = @truncate(u16, value >> 16);
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},
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0x0400_0054 => bus.ppu.bldy.raw = @truncate(u16, value),
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0x0400_0058...0x0400_005C => {}, // Unused
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// Sound
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0x0400_0060...0x0400_00A4 => apu.write(T, &bus.apu, address, value),
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0x0400_00A8, 0x0400_00AC => {}, // Unused
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// DMA Transfers
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0x0400_00B0...0x0400_00DC => dma.write(T, &bus.dma, address, value),
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0x0400_00E0...0x0400_00FC => {}, // Unused
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// Timers
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0x0400_0100...0x0400_010C => timer.write(T, &bus.tim, address, value),
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0x0400_0110...0x0400_011C => {}, // Unused
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// Serial Communication 1
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0x0400_0120 => log.debug("Wrote 0x{X:0>8} to SIODATA32/(SIOMULTI0 and SIOMULTI1)", .{value}),
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0x0400_0124 => log.debug("Wrote 0x{X:0>8} to SIOMULTI2 and SIOMULTI3", .{value}),
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0x0400_0128 => log.debug("Wrote 0x{X:0>8} to SIOCNT and SIOMLT_SEND/SIODATA8", .{value}),
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0x0400_012C => {}, // Unused
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// Keypad Input
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0x0400_0130 => log.debug("Wrote 0x{X:0>8} to KEYINPUT and KEYCNT", .{value}),
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0x0400_0134 => log.debug("Wrote 0x{X:0>8} to RCNT and IR", .{value}),
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0x0400_0138, 0x0400_013C => {}, // Unused
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// Serial Communication 2
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0x0400_0140 => log.debug("Wrote 0x{X:0>8} to JOYCNT", .{value}),
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0x0400_0150 => log.debug("Wrote 0x{X:0>8} to JOY_RECV", .{value}),
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0x0400_0154 => log.debug("Wrote 0x{X:0>8} to JOY_TRANS", .{value}),
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0x0400_0158 => log.debug("Wrote 0x{X:0>8} to JOYSTAT (?)", .{value}),
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0x0400_0144...0x0400_014C, 0x0400_015C => {}, // Unused
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0x0400_0160...0x0400_01FC => {},
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// Interrupts
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0x0400_0200 => bus.io.setIrqs(value),
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0x0400_0204 => log.debug("Wrote 0x{X:0>8} to WAITCNT", .{value}),
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0x0400_0208 => bus.io.ime = value & 1 == 1,
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0x0400_020C...0x0400_021C => {}, // Unused
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else => util.io.write.undef(log, "Tried to write 0x{X:0>8}{} to 0x{X:0>8}", .{ value, T, address }),
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},
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u16 => switch (address) {
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// Display
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0x0400_0000 => bus.ppu.dispcnt.raw = value,
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0x0400_0004 => bus.ppu.dispstat.raw = value,
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0x0400_0006 => {}, // vcount is read-only
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0x0400_0008 => bus.ppu.bg[0].cnt.raw = value,
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0x0400_000A => bus.ppu.bg[1].cnt.raw = value,
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0x0400_000C => bus.ppu.bg[2].cnt.raw = value,
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0x0400_000E => bus.ppu.bg[3].cnt.raw = value,
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0x0400_0010 => bus.ppu.bg[0].hofs.raw = value, // TODO: Don't write out every HOFS / VOFS?
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0x0400_0012 => bus.ppu.bg[0].vofs.raw = value,
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0x0400_0014 => bus.ppu.bg[1].hofs.raw = value,
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0x0400_0016 => bus.ppu.bg[1].vofs.raw = value,
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0x0400_0018 => bus.ppu.bg[2].hofs.raw = value,
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0x0400_001A => bus.ppu.bg[2].vofs.raw = value,
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0x0400_001C => bus.ppu.bg[3].hofs.raw = value,
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0x0400_001E => bus.ppu.bg[3].vofs.raw = value,
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0x0400_0020 => bus.ppu.aff_bg[0].pa = @bitCast(i16, value),
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0x0400_0022 => bus.ppu.aff_bg[0].pb = @bitCast(i16, value),
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0x0400_0024 => bus.ppu.aff_bg[0].pc = @bitCast(i16, value),
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0x0400_0026 => bus.ppu.aff_bg[0].pd = @bitCast(i16, value),
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0x0400_0028 => bus.ppu.aff_bg[0].x = @bitCast(i32, @bitCast(u32, bus.ppu.aff_bg[0].x) & 0xFFFF_0000 | value),
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0x0400_002A => bus.ppu.aff_bg[0].x = @bitCast(i32, @bitCast(u32, bus.ppu.aff_bg[0].x) & 0x0000_FFFF | (@as(u32, value) << 16)),
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0x0400_002C => bus.ppu.aff_bg[0].y = @bitCast(i32, @bitCast(u32, bus.ppu.aff_bg[0].y) & 0xFFFF_0000 | value),
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0x0400_002E => bus.ppu.aff_bg[0].y = @bitCast(i32, @bitCast(u32, bus.ppu.aff_bg[0].y) & 0x0000_FFFF | (@as(u32, value) << 16)),
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0x0400_0030 => bus.ppu.aff_bg[1].pa = @bitCast(i16, value),
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0x0400_0032 => bus.ppu.aff_bg[1].pb = @bitCast(i16, value),
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0x0400_0034 => bus.ppu.aff_bg[1].pc = @bitCast(i16, value),
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0x0400_0036 => bus.ppu.aff_bg[1].pd = @bitCast(i16, value),
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0x0400_0038 => bus.ppu.aff_bg[1].x = @bitCast(i32, @bitCast(u32, bus.ppu.aff_bg[1].x) & 0xFFFF_0000 | value),
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0x0400_003A => bus.ppu.aff_bg[1].x = @bitCast(i32, @bitCast(u32, bus.ppu.aff_bg[1].x) & 0x0000_FFFF | (@as(u32, value) << 16)),
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0x0400_003C => bus.ppu.aff_bg[1].y = @bitCast(i32, @bitCast(u32, bus.ppu.aff_bg[1].y) & 0xFFFF_0000 | value),
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0x0400_003E => bus.ppu.aff_bg[1].y = @bitCast(i32, @bitCast(u32, bus.ppu.aff_bg[1].y) & 0x0000_FFFF | (@as(u32, value) << 16)),
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0x0400_0040 => bus.ppu.win.h[0].raw = value,
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0x0400_0042 => bus.ppu.win.h[1].raw = value,
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0x0400_0044 => bus.ppu.win.v[0].raw = value,
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0x0400_0046 => bus.ppu.win.v[1].raw = value,
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0x0400_0048 => bus.ppu.win.in.raw = value,
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0x0400_004A => bus.ppu.win.out.raw = value,
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0x0400_004C => log.debug("Wrote 0x{X:0>4} to MOSAIC", .{value}),
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0x0400_0050 => bus.ppu.bldcnt.raw = value,
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0x0400_0052 => bus.ppu.bldalpha.raw = value,
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0x0400_0054 => bus.ppu.bldy.raw = value,
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0x0400_004E, 0x0400_0056 => {}, // Not used
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// Sound
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0x0400_0060...0x0400_009E => apu.write(T, &bus.apu, address, value),
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// Dma Transfers
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0x0400_00B0...0x0400_00DE => dma.write(T, &bus.dma, address, value),
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// Timers
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0x0400_0100...0x0400_010E => timer.write(T, &bus.tim, address, value),
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0x0400_0114 => {}, // TODO: Gyakuten Saiban writes 0x8000 to 0x0400_0114
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0x0400_0110 => {}, // Not Used,
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// Serial Communication 1
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0x0400_0120 => log.debug("Wrote 0x{X:0>4} to SIOMULTI0", .{value}),
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0x0400_0122 => log.debug("Wrote 0x{X:0>4} to SIOMULTI1", .{value}),
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0x0400_0124 => log.debug("Wrote 0x{X:0>4} to SIOMULTI2", .{value}),
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0x0400_0126 => log.debug("Wrote 0x{X:0>4} to SIOMULTI3", .{value}),
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0x0400_0128 => log.debug("Wrote 0x{X:0>4} to SIOCNT", .{value}),
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0x0400_012A => log.debug("Wrote 0x{X:0>4} to SIOMLT_SEND", .{value}),
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// Keypad Input
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0x0400_0130 => log.debug("Wrote 0x{X:0>4} to KEYINPUT. Ignored", .{value}),
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0x0400_0132 => log.debug("Wrote 0x{X:0>4} to KEYCNT", .{value}),
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// Serial Communication 2
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0x0400_0134 => log.debug("Wrote 0x{X:0>4} to RCNT", .{value}),
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0x0400_0140 => log.debug("Wrote 0x{X:0>4} to JOYCNT", .{value}),
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0x0400_0158 => log.debug("Wrote 0x{X:0>4} to JOYSTAT", .{value}),
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0x0400_0142, 0x0400_015A => {}, // Not Used
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// Interrupts
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0x0400_0200 => bus.io.ie.raw = value,
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0x0400_0202 => bus.io.irq.raw &= ~value,
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0x0400_0204 => log.debug("Wrote 0x{X:0>4} to WAITCNT", .{value}),
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0x0400_0208 => bus.io.ime = value & 1 == 1,
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0x0400_0206, 0x0400_020A => {}, // Not Used
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else => util.io.write.undef(log, "Tried to write 0x{X:0>4}{} to 0x{X:0>8}", .{ value, T, address }),
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},
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u8 => switch (address) {
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// Display
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0x0400_0004 => bus.ppu.dispstat.raw = (bus.ppu.dispstat.raw & 0xFF00) | value,
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0x0400_0005 => bus.ppu.dispstat.raw = (@as(u16, value) << 8) | (bus.ppu.dispstat.raw & 0xFF),
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0x0400_0008 => bus.ppu.bg[0].cnt.raw = (bus.ppu.bg[0].cnt.raw & 0xFF00) | value,
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0x0400_0009 => bus.ppu.bg[0].cnt.raw = (@as(u16, value) << 8) | (bus.ppu.bg[0].cnt.raw & 0xFF),
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0x0400_000A => bus.ppu.bg[1].cnt.raw = (bus.ppu.bg[1].cnt.raw & 0xFF00) | value,
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0x0400_000B => bus.ppu.bg[1].cnt.raw = (@as(u16, value) << 8) | (bus.ppu.bg[1].cnt.raw & 0xFF),
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0x0400_0048 => bus.ppu.win.setInL(value),
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0x0400_0049 => bus.ppu.win.setInH(value),
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0x0400_004A => bus.ppu.win.setOutL(value),
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0x0400_0054 => bus.ppu.bldy.raw = (bus.ppu.bldy.raw & 0xFF00) | value,
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// Sound
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0x0400_0060...0x0400_00A7 => apu.write(T, &bus.apu, address, value),
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// Serial Communication 1
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0x0400_0120 => log.debug("Wrote 0x{X:0>2} to SIODATA32_L_L", .{value}),
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0x0400_0128 => log.debug("Wrote 0x{X:0>2} to SIOCNT_L", .{value}),
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// Serial Communication 2
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0x0400_0135 => log.debug("Wrote 0x{X:0>2} to RCNT_H", .{value}),
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0x0400_0140 => log.debug("Wrote 0x{X:0>2} to JOYCNT_L", .{value}),
|
|
|
|
// Interrupts
|
|
0x0400_0202 => bus.io.irq.raw &= ~@as(u16, value),
|
|
0x0400_0208 => bus.io.ime = value & 1 == 1,
|
|
0x0400_0300 => bus.io.postflg = std.meta.intToEnum(PostFlag, value & 1) catch unreachable,
|
|
0x0400_0301 => bus.io.haltcnt = if (value >> 7 & 1 == 0) .Halt else std.debug.panic("TODO: Implement STOP", .{}),
|
|
|
|
0x0400_0410 => log.debug("Wrote 0x{X:0>2} to the common yet undocumented 0x{X:0>8}", .{ value, address }),
|
|
else => util.io.write.undef(log, "Tried to write 0x{X:0>2}{} to 0x{X:0>8}", .{ value, T, address }),
|
|
},
|
|
else => @compileError("I/O: Unsupported write width"),
|
|
};
|
|
}
|
|
|
|
/// Read / Write
|
|
pub const PostFlag = enum(u1) {
|
|
FirstBoot = 0,
|
|
FurtherBoots = 1,
|
|
};
|
|
|
|
/// Write Only
|
|
pub const HaltControl = enum {
|
|
Halt,
|
|
Stop,
|
|
Execute,
|
|
};
|
|
|
|
/// Read / Write
|
|
pub const DisplayControl = extern union {
|
|
bg_mode: Bitfield(u16, 0, 3),
|
|
frame_select: Bit(u16, 4),
|
|
hblank_interval_free: Bit(u16, 5),
|
|
obj_mapping: Bit(u16, 6),
|
|
forced_blank: Bit(u16, 7),
|
|
bg_enable: Bitfield(u16, 8, 4),
|
|
obj_enable: Bit(u16, 12),
|
|
win_enable: Bitfield(u16, 13, 2),
|
|
obj_win_enable: Bit(u16, 15),
|
|
raw: u16,
|
|
};
|
|
|
|
/// Read / Write
|
|
pub const DisplayStatus = extern union {
|
|
vblank: Bit(u16, 0),
|
|
hblank: Bit(u16, 1),
|
|
coincidence: Bit(u16, 2),
|
|
vblank_irq: Bit(u16, 3),
|
|
hblank_irq: Bit(u16, 4),
|
|
vcount_irq: Bit(u16, 5),
|
|
vcount_trigger: Bitfield(u16, 8, 8),
|
|
raw: u16,
|
|
};
|
|
|
|
/// Read Only
|
|
pub const VCount = extern union {
|
|
scanline: Bitfield(u16, 0, 8),
|
|
raw: u16,
|
|
};
|
|
|
|
/// Read / Write
|
|
const InterruptEnable = extern union {
|
|
vblank: Bit(u16, 0),
|
|
hblank: Bit(u16, 1),
|
|
coincidence: Bit(u16, 2),
|
|
tm0_overflow: Bit(u16, 3),
|
|
tm1_overflow: Bit(u16, 4),
|
|
tm2_overflow: Bit(u16, 5),
|
|
tm3_overflow: Bit(u16, 6),
|
|
serial: Bit(u16, 7),
|
|
dma0: Bit(u16, 8),
|
|
dma1: Bit(u16, 9),
|
|
dma2: Bit(u16, 10),
|
|
dma3: Bit(u16, 11),
|
|
keypad: Bit(u16, 12),
|
|
game_pak: Bit(u16, 13),
|
|
raw: u16,
|
|
};
|
|
|
|
/// Read Only
|
|
/// 0 = Pressed, 1 = Released
|
|
const KeyInput = extern union {
|
|
a: Bit(u16, 0),
|
|
b: Bit(u16, 1),
|
|
select: Bit(u16, 2),
|
|
start: Bit(u16, 3),
|
|
right: Bit(u16, 4),
|
|
left: Bit(u16, 5),
|
|
up: Bit(u16, 6),
|
|
down: Bit(u16, 7),
|
|
shoulder_r: Bit(u16, 8),
|
|
shoulder_l: Bit(u16, 9),
|
|
raw: u16,
|
|
};
|
|
|
|
// Read / Write
|
|
pub const BackgroundControl = extern union {
|
|
priority: Bitfield(u16, 0, 2),
|
|
char_base: Bitfield(u16, 2, 2),
|
|
mosaic_enable: Bit(u16, 6),
|
|
colour_mode: Bit(u16, 7),
|
|
screen_base: Bitfield(u16, 8, 5),
|
|
display_overflow: Bit(u16, 13),
|
|
size: Bitfield(u16, 14, 2),
|
|
raw: u16,
|
|
};
|
|
|
|
/// Write Only
|
|
pub const BackgroundOffset = extern union {
|
|
offset: Bitfield(u16, 0, 9),
|
|
raw: u16,
|
|
};
|
|
|
|
/// Read / Write
|
|
pub const BldCnt = extern union {
|
|
/// BLDCNT{0} is BG0 A
|
|
/// BLDCNT{4} is OBJ A
|
|
/// BLDCNT{5} is BD A
|
|
layer_a: Bitfield(u16, 0, 6),
|
|
mode: Bitfield(u16, 6, 2),
|
|
|
|
/// BLDCNT{8} is BG0 B
|
|
/// BLDCNT{12} is OBJ B
|
|
/// BLDCNT{13} is BD B
|
|
layer_b: Bitfield(u16, 8, 6),
|
|
raw: u16,
|
|
};
|
|
|
|
/// Read-only?
|
|
/// Alpha Blending Coefficients
|
|
pub const BldAlpha = extern union {
|
|
eva: Bitfield(u16, 0, 5),
|
|
evb: Bitfield(u16, 8, 5),
|
|
raw: u16,
|
|
};
|
|
|
|
/// Write-only?
|
|
/// Brightness COefficients
|
|
pub const BldY = extern union {
|
|
evy: Bitfield(u16, 0, 5),
|
|
raw: u16,
|
|
};
|
|
|
|
/// Write-only
|
|
pub const WinH = extern union {
|
|
x2: Bitfield(u16, 0, 8),
|
|
x1: Bitfield(u16, 8, 8),
|
|
raw: u16,
|
|
};
|
|
|
|
/// Write-only
|
|
pub const WinV = extern union {
|
|
y2: Bitfield(u16, 0, 8),
|
|
y1: Bitfield(u16, 8, 8),
|
|
raw: u16,
|
|
};
|
|
|
|
pub const WinIn = extern union {
|
|
w0_bg: Bitfield(u16, 0, 4),
|
|
w0_obj: Bit(u16, 4),
|
|
w0_colour: Bit(u16, 5),
|
|
w1_bg: Bitfield(u16, 8, 4),
|
|
w1_obj: Bit(u16, 12),
|
|
w1_colour: Bit(u16, 13),
|
|
raw: u16,
|
|
};
|
|
|
|
pub const WinOut = extern union {
|
|
out_bg: Bitfield(u16, 0, 4),
|
|
out_obj: Bit(u16, 4),
|
|
out_colour: Bit(u16, 5),
|
|
obj_bg: Bitfield(u16, 8, 4),
|
|
obj_obj: Bit(u16, 12),
|
|
obj_colour: Bit(u16, 13),
|
|
raw: u16,
|
|
};
|
|
|
|
/// Read / Write
|
|
const InterruptRequest = extern union {
|
|
vblank: Bit(u16, 0),
|
|
hblank: Bit(u16, 1),
|
|
coincidence: Bit(u16, 2),
|
|
tim0: Bit(u16, 3),
|
|
tim1: Bit(u16, 4),
|
|
tim2: Bit(u16, 5),
|
|
tim3: Bit(u16, 6),
|
|
serial: Bit(u16, 7),
|
|
dma0: Bit(u16, 8),
|
|
dma1: Bit(u16, 9),
|
|
dma2: Bit(u16, 10),
|
|
dma3: Bit(u16, 11),
|
|
keypad: Bit(u16, 12),
|
|
game_pak: Bit(u16, 13),
|
|
raw: u16,
|
|
};
|
|
|
|
/// Read / Write
|
|
pub const DmaControl = extern union {
|
|
dad_adj: Bitfield(u16, 5, 2),
|
|
sad_adj: Bitfield(u16, 7, 2),
|
|
repeat: Bit(u16, 9),
|
|
transfer_type: Bit(u16, 10),
|
|
pak_drq: Bit(u16, 11),
|
|
start_timing: Bitfield(u16, 12, 2),
|
|
irq: Bit(u16, 14),
|
|
enabled: Bit(u16, 15),
|
|
raw: u16,
|
|
};
|
|
|
|
/// Read / Write
|
|
pub const TimerControl = extern union {
|
|
frequency: Bitfield(u16, 0, 2),
|
|
cascade: Bit(u16, 2),
|
|
irq: Bit(u16, 6),
|
|
enabled: Bit(u16, 7),
|
|
raw: u16,
|
|
};
|
|
|
|
/// Read / Write
|
|
/// NR10
|
|
pub const Sweep = extern union {
|
|
shift: Bitfield(u8, 0, 3),
|
|
direction: Bit(u8, 3),
|
|
period: Bitfield(u8, 4, 3),
|
|
raw: u8,
|
|
};
|
|
|
|
/// Read / Write
|
|
/// This represents the Duty / Len
|
|
/// NRx1
|
|
pub const Duty = extern union {
|
|
/// Write-only
|
|
/// Only used when bit 6 is set
|
|
length: Bitfield(u16, 0, 6),
|
|
pattern: Bitfield(u16, 6, 2),
|
|
raw: u8,
|
|
};
|
|
|
|
/// Read / Write
|
|
/// NRx2
|
|
pub const Envelope = extern union {
|
|
period: Bitfield(u8, 0, 3),
|
|
direction: Bit(u8, 3),
|
|
init_vol: Bitfield(u8, 4, 4),
|
|
raw: u8,
|
|
};
|
|
|
|
/// Read / Write
|
|
/// NRx3, NRx4
|
|
pub const Frequency = extern union {
|
|
/// Write-only
|
|
frequency: Bitfield(u16, 0, 11),
|
|
length_enable: Bit(u16, 14),
|
|
/// Write-only
|
|
trigger: Bit(u16, 15),
|
|
|
|
raw: u16,
|
|
};
|
|
|
|
/// Read / Write
|
|
/// NR30
|
|
pub const WaveSelect = extern union {
|
|
dimension: Bit(u8, 5),
|
|
bank: Bit(u8, 6),
|
|
enabled: Bit(u8, 7),
|
|
raw: u8,
|
|
};
|
|
|
|
/// Read / Write
|
|
/// NR32
|
|
pub const WaveVolume = extern union {
|
|
kind: Bitfield(u8, 5, 2),
|
|
force: Bit(u8, 7),
|
|
raw: u8,
|
|
};
|
|
|
|
/// Read / Write
|
|
/// NR43
|
|
pub const PolyCounter = extern union {
|
|
div_ratio: Bitfield(u8, 0, 3),
|
|
width: Bit(u8, 3),
|
|
shift: Bitfield(u8, 4, 4),
|
|
raw: u8,
|
|
};
|
|
|
|
/// Read / Write
|
|
/// NR44
|
|
pub const NoiseControl = extern union {
|
|
length_enable: Bit(u8, 6),
|
|
trigger: Bit(u8, 7),
|
|
raw: u8,
|
|
};
|
|
|
|
/// Read / Write
|
|
pub const ChannelVolumeControl = extern union {
|
|
right_vol: Bitfield(u16, 0, 3),
|
|
left_vol: Bitfield(u16, 4, 3),
|
|
ch_right: Bitfield(u16, 8, 4),
|
|
ch_left: Bitfield(u16, 12, 4),
|
|
raw: u16,
|
|
};
|
|
|
|
/// Read / Write
|
|
pub const DmaSoundControl = extern union {
|
|
ch_vol: Bitfield(u16, 0, 2),
|
|
chA_vol: Bit(u16, 2),
|
|
chB_vol: Bit(u16, 3),
|
|
|
|
chA_right: Bit(u16, 8),
|
|
chA_left: Bit(u16, 9),
|
|
chA_timer: Bit(u16, 10),
|
|
/// Write only?
|
|
chA_reset: Bit(u16, 11),
|
|
|
|
chB_right: Bit(u16, 12),
|
|
chB_left: Bit(u16, 13),
|
|
chB_timer: Bit(u16, 14),
|
|
/// Write only?
|
|
chB_reset: Bit(u16, 15),
|
|
raw: u16,
|
|
};
|
|
|
|
/// Read / Write
|
|
pub const SoundControl = extern union {
|
|
/// Read-only
|
|
ch1_enable: Bit(u8, 0),
|
|
/// Read-only
|
|
ch2_enable: Bit(u8, 1),
|
|
/// Read-only
|
|
ch3_enable: Bit(u8, 2),
|
|
/// Read-only
|
|
ch4_enable: Bit(u8, 3),
|
|
apu_enable: Bit(u8, 7),
|
|
raw: u8,
|
|
};
|
|
|
|
/// Read / Write
|
|
pub const SoundBias = extern union {
|
|
level: Bitfield(u16, 1, 9),
|
|
sampling_cycle: Bitfield(u16, 14, 2),
|
|
raw: u16,
|
|
};
|