//called by ppu.tick() when Hcounter=0
void CPU::scanline() {
status.lineclocks = lineclocks();
//forcefully sync S-CPU to other processors, in case chips are not communicating
synchronize_ppu();
synchronize_smp();
synchronize_coprocessor();
system.scanline();
if(vcounter() == 0) {
//HDMA init triggers once every frame
status.hdma_init_position = (cpu_version == 1 ? 12 + 8 - dma_counter() : 12 + dma_counter());
status.hdma_init_triggered = false;
status.auto_joypad_counter = 0;
}
//DRAM refresh occurs once every scanline
if(cpu_version == 2) status.dram_refresh_position = 530 + 8 - dma_counter();
status.dram_refreshed = false;
//HDMA triggers once every visible scanline
if(vcounter() <= (ppu.overscan() == false ? 224 : 239)) {
status.hdma_position = 1104;
status.hdma_triggered = false;
}
}
void CPU::scanline() {
synchronize_smp();
synchronize_ppu();
synchronize_coprocessor();
system.scanline();
if(vcounter() == 0) hdma_init();
queue.enqueue(534, QueueEvent::DramRefresh);
if(vcounter() <= (ppu.overscan() == false ? 224 : 239)) {
queue.enqueue(1104 + 8, QueueEvent::HdmaRun);
}
if(vcounter() == input.latchy) {
queue.enqueue(input.latchx, QueueEvent::ControllerLatch);
}
bool nmi_valid = status.nmi_valid;
status.nmi_valid = vcounter() >= (ppu.overscan() == false ? 225 : 240);
if(!nmi_valid && status.nmi_valid) {
status.nmi_line = true;
if(status.nmi_enabled) status.nmi_transition = true;
} else if(nmi_valid && !status.nmi_valid) {
status.nmi_line = false;
}
if(status.auto_joypad_poll_enabled && vcounter() == (ppu.overscan() == false ? 227 : 242)) {
input.poll();
run_auto_joypad_poll();
}
}