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chore: stub KeyInput I/O register

This commit is contained in:
Rekai Nyangadzayi Musuka 2022-01-30 02:38:29 -04:00
parent dd632975f8
commit b0332e6eb8
1 changed files with 23 additions and 4 deletions
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27
src/bus/io.zig
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@ -12,14 +12,16 @@ pub const Io = struct {
/// Read / Write /// Read / Write
ime: bool, ime: bool,
ie: InterruptEnable, ie: InterruptEnable,
keyinput: KeyInput,
pub fn init() Self { pub fn init() Self {
return .{ return .{
.dispcnt = .{ .raw = 0x0000_0000 }, .dispcnt = .{ .raw = 0x0000 },
.dispstat = .{ .raw = 0x0000_0000 }, .dispstat = .{ .raw = 0x0000 },
.vcount = .{ .raw = 0x0000_0000 }, .vcount = .{ .raw = 0x0000 },
.ime = false, .ime = false,
.ie = .{ .raw = 0x0000_0000 }, .ie = .{ .raw = 0x0000 },
.keyinput = .{ .raw = 0x01FF },
}; };
} }
@ -48,6 +50,7 @@ pub const Io = struct {
0x0400_0000 => self.dispcnt.raw, 0x0400_0000 => self.dispcnt.raw,
0x0400_0004 => self.dispstat.raw, 0x0400_0004 => self.dispstat.raw,
0x0400_0006 => self.vcount.raw, 0x0400_0006 => self.vcount.raw,
0x0400_0130 => self.keyinput.raw,
0x0400_0200 => self.ie.raw, 0x0400_0200 => self.ie.raw,
0x0400_0208 => @boolToInt(self.ime), 0x0400_0208 => @boolToInt(self.ime),
else => std.debug.panic("[I/O:16] tried to read from {X:}", .{addr}), else => std.debug.panic("[I/O:16] tried to read from {X:}", .{addr}),
@ -129,3 +132,19 @@ const InterruptEnable = extern union {
game_pak: Bit(u16, 13), game_pak: Bit(u16, 13),
raw: u16, 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,
};