mirror of https://github.com/bsnes-emu/bsnes.git
74 lines
1.4 KiB
C++
74 lines
1.4 KiB
C++
#include <md/md.hpp>
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namespace MegaDrive {
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VDP vdp;
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#include "memory.cpp"
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#include "io.cpp"
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#include "dma.cpp"
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#include "render.cpp"
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#include "background.cpp"
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#include "sprite.cpp"
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#include "serialization.cpp"
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auto VDP::Enter() -> void {
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while(true) scheduler.synchronize(), vdp.main();
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}
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auto VDP::main() -> void {
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scanline();
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if(state.y < screenHeight()) {
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if(state.y == 0) {
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cpu.lower(CPU::Interrupt::VerticalBlank);
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}
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cpu.lower(CPU::Interrupt::HorizontalBlank);
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while(state.hcounter < 1280) {
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run();
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step(pixelWidth());
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}
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if(io.horizontalBlankInterruptEnable) {
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cpu.raise(CPU::Interrupt::HorizontalBlank);
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}
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step(430);
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} else {
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if(state.y == screenHeight()) {
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if(io.verticalBlankInterruptEnable) {
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cpu.raise(CPU::Interrupt::VerticalBlank);
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}
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apu.setINT(true);
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}
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step(1710);
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apu.setINT(false);
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}
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}
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auto VDP::step(uint clocks) -> void {
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state.hcounter += clocks;
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while(clocks--) {
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dma.run();
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Thread::step(1);
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synchronize(cpu);
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synchronize(apu);
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}
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}
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auto VDP::refresh() -> void {
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Emulator::video.refresh(buffer, 1280 * sizeof(uint32), 1280, 480);
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}
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auto VDP::power() -> void {
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create(VDP::Enter, system.colorburst() * 15.0 / 2.0);
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memory::fill(&io, sizeof(IO));
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memory::fill(&latch, sizeof(Latch));
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memory::fill(&state, sizeof(State));
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planeA.power();
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window.power();
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planeB.power();
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sprite.power();
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dma.power();
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}
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}
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