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chore: improve APU accuracy + scheduler refactoring

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This commit is contained in:
Rekai Nyangadzayi Musuka
2022-05-20 16:01:12 -03:00
parent e7777737b3
commit af2ad6c924
5 changed files with 39 additions and 43 deletions
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8
src/ppu.zig
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@@ -44,7 +44,7 @@ pub const Ppu = struct {
pub fn init(alloc: Allocator, sched: *Scheduler) !Self {
// Queue first Hblank
sched.push(.Draw, sched.tick + (240 * 4));
sched.push(.Draw, 240 * 4);
const framebufs = try alloc.alloc(u8, (framebuf_pitch * height) * 2);
std.mem.set(u8, framebufs, 0);
@@ -429,7 +429,7 @@ pub const Ppu = struct {
pollBlankingDma(&cpu.bus, .HBlank);
self.dispstat.hblank.set();
self.sched.push(.HBlank, self.sched.now() + (68 * 4) - late);
self.sched.push(.HBlank, 68 * 4 -| late);
}
pub fn handleHBlankEnd(self: *Self, cpu: *Arm7tdmi, late: u64) void {
@@ -451,7 +451,7 @@ pub const Ppu = struct {
if (scanline < 160) {
// Transitioning to another Draw
self.sched.push(.Draw, self.sched.now() + (240 * 4) - late);
self.sched.push(.Draw, 240 * 4 -| late);
} else {
// Transitioning to a Vblank
if (scanline == 160) {
@@ -469,7 +469,7 @@ pub const Ppu = struct {
}
if (scanline == 227) self.dispstat.vblank.unset();
self.sched.push(.VBlank, self.sched.now() + (240 * 4) - late);
self.sched.push(.VBlank, 240 * 4 -| late);
}
}
};