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chore(io): DISPSTAT bits 3 and 4 better match GBATEK documentation

This commit is contained in:
Rekai Nyangadzayi Musuka 2022-10-21 05:11:52 -03:00
parent 4f629227ab
commit 15dc4ce03a
1 changed files with 3 additions and 2 deletions
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5
src/scheduler.zig
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@ -44,7 +44,6 @@ pub const Scheduler = struct {
bus.ppu.drawScanline(&bus.io);
bus.io.vcount.scanline.write(new_scanline);
bus.io.dispstat.hblank.unset();
if (new_scanline < 160) {
// Transitioning to another Draw
@ -69,6 +68,8 @@ pub const Scheduler = struct {
const new_scanline = scanline + 1;
bus.io.vcount.scanline.write(new_scanline);
if (new_scanline == 227) bus.io.dispstat.vblank.unset();
if (new_scanline < 228) {
// Transition to another Vblank
self.push(.VBlank, self.tick + (308 * 4));
@ -76,7 +77,7 @@ pub const Scheduler = struct {
// Transition to another Draw
bus.io.vcount.scanline.write(0); // Reset Scanline
bus.io.dispstat.vblank.unset();
// DISPSTAT was disabled on scanline 227
self.push(.Draw, self.tick + (240 * 4));
}
},