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feat: improve DMA Transfer support

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This commit is contained in:
Rekai Nyangadzayi Musuka
2022-10-21 05:12:25 -03:00
parent 12c628e82c
commit 6723bfb364
3 changed files with 83 additions and 36 deletions
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11
src/scheduler.zig
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@@ -1,5 +1,7 @@
const std = @import("std");
const pollBlankingDma = @import("bus/dma.zig").pollBlankingDma;
const Bus = @import("Bus.zig");
const Arm7tdmi = @import("cpu.zig").Arm7tdmi;
@@ -68,6 +70,9 @@ pub const Scheduler = struct {
irq.vblank.set();
cpu.handleInterrupt();
}
// See if Vblank DMA is present and not enabled
pollBlankingDma(bus, .VBlank);
}
if (scanline == 227) stat.vblank.unset();
@@ -84,6 +89,9 @@ pub const Scheduler = struct {
cpu.handleInterrupt();
}
// See if Hblank DMA is present and not enabled
pollBlankingDma(bus, .HBlank);
bus.ppu.dispstat.hblank.set();
self.push(.HBlank, self.tick + (68 * 4));
},
@@ -96,6 +104,9 @@ pub const Scheduler = struct {
cpu.handleInterrupt();
}
// See if Hblank DMA is present and not enabled
pollBlankingDma(bus, .HBlank);
bus.ppu.dispstat.hblank.set();
self.push(.HBlank, self.tick + (68 * 4));
},