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chore: implement a non-working mode 0

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This commit is contained in:
Rekai Nyangadzayi Musuka
2023-11-14 00:22:43 -06:00
parent 64b1bdbe19
commit 16233f3cd8
6 changed files with 343 additions and 19 deletions
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8
src/core/ppu.zig
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@@ -21,7 +21,7 @@ pub const Ppu = struct {
vram: *Vram,
engines: struct { EngineA, EngineB } = .{ .{}, .{} },
engines: struct { EngineA, EngineB },
io: Io = .{},
@@ -44,20 +44,22 @@ pub const Ppu = struct {
pub fn init(allocator: Allocator, vram: *Vram) !@This() {
return .{
.fb = try FrameBuffer.init(allocator),
.engines = .{ try EngineA.init(allocator), try EngineB.init(allocator) },
.vram = vram,
};
}
pub fn deinit(self: @This(), allocator: Allocator) void {
self.fb.deinit(allocator);
inline for (self.engines) |eng| eng.deinit(allocator);
}
pub fn drawScanline(self: *@This(), bus: *System.Bus9) void {
if (self.io.powcnt.engine2d_a.read())
self.engines[0].drawScanline(bus, &self.fb, &self.io);
self.engines[0].drawScanline(bus, &self.fb);
if (self.io.powcnt.engine2d_b.read())
self.engines[1].drawScanline(bus, &self.fb, &self.io);
self.engines[1].drawScanline(bus, &self.fb);
}
/// HDraw -> HBlank