public void Tick_Tick227Lines_InVBlank()
{
AgbPpu ppu = PpuUtil.CreatePpu();
PpuUtil.TickPpuByAmount(ppu, 227, 0);
Assert.Equal(PpuState.VBlank, ppu.State);
}
public void Tick_Tick159Lines_InRender()
{
AgbPpu ppu = PpuUtil.CreatePpu();
PpuUtil.TickPpuByAmount(ppu, 159, 0);
Assert.Equal(PpuState.Render, ppu.State);
}
public void Tick_Tick160LinesAnd240Dots_InVBlank()
{
AgbPpu ppu = PpuUtil.CreatePpu();
PpuUtil.TickPpuByAmount(ppu, 160, 240);
Assert.Equal(PpuState.VBlank, ppu.State);
}
public void Tick_Tick239Dots_InRender()
{
AgbPpu ppu = PpuUtil.CreatePpu();
PpuUtil.TickPpuByAmount(ppu, 0, 239);
Assert.Equal(PpuState.Render, ppu.State);
}
public void Tick_Tick307Dots_InHBlank()
{
AgbPpu ppu = PpuUtil.CreatePpu();
PpuUtil.TickPpuByAmount(ppu, 0, 307);
Assert.Equal(PpuState.HBlank, ppu.State);
}
public void Vcount_TickPpuToLine100_VcountCorrect()
{
AgbMemoryMap memoryMap = new AgbMemoryMap();
AgbPpu ppu = PpuUtil.CreatePpu(memoryMap);
PpuUtil.TickPpuByAmount(ppu, 100, 0);
memoryMap.UpdateMmio();
Assert.Equal(0x0064, memoryMap.ReadU16(0x4000006)); // V-Count flag
}
public void Dispstat_SetVCountAndTickUntilVCountLine_VCountFlagSet()
{
AgbMemoryMap memoryMap = new AgbMemoryMap();
AgbPpu ppu = PpuUtil.CreatePpu(memoryMap);
memoryMap.WriteU16(0x4000004, 0x6400); // VCount = line 100
memoryMap.FlushMmio();
PpuUtil.TickPpuByAmount(ppu, 100, 0);
memoryMap.UpdateMmio();
Assert.Equal(0x6404, memoryMap.ReadU16(0x4000004)); // V-Count flag
}
public void Dispstat_TickUntilHBlankPeriodInVBlank_HBlankFlagSet()
{
AgbMemoryMap memoryMap = new AgbMemoryMap();
AgbPpu ppu = PpuUtil.CreatePpu(memoryMap);
memoryMap.WriteU16(0x4000004, 0xFF00); // VCount = line 255 (impossible)
memoryMap.FlushMmio();
PpuUtil.TickPpuByAmount(ppu, 160, 240);
memoryMap.UpdateMmio();
Assert.Equal(0xFF03, memoryMap.ReadU16(0x4000004)); // H-Blank and V-Blank flags
}
public void Dispstat_SetVCountAndEnableVCountIrqAndTickUntilVCountLine_InterruptRequested()
{
AgbMemoryMap memoryMap = new AgbMemoryMap();
AgbCpu cpu = new AgbCpu(memoryMap);
AgbPpu ppu = PpuUtil.CreatePpu(memoryMap, cpu);
memoryMap.WriteU32(0x4000208, 0x01); // Interrupt Master Enable
memoryMap.WriteU16(0x4000200, 0x0004); // IE = V-Count IRQ enabled
memoryMap.WriteU16(0x4000004, 0x6420); // DISPSTAT = V-Blank IRQ enabled, VCount = line 100
memoryMap.FlushMmio();
PpuUtil.TickPpuByAmount(ppu, 100, 0);
memoryMap.UpdateMmio();
Assert.Equal(0x6424, memoryMap.ReadU16(0x4000004)); // V-Count flag, V-Count IRQ enabled
Assert.Equal(0x0004, memoryMap.ReadU16(0x4000202)); // IF = V-Count
Assert.Equal(CpuMode.Irq, cpu.CurrentStatus.Mode);
}
public void Dispstat_EnableHBlankIrqAndTickUntilHBlank_InterruptRequested()
{
AgbMemoryMap memoryMap = new AgbMemoryMap();
AgbCpu cpu = new AgbCpu(memoryMap);
AgbPpu ppu = PpuUtil.CreatePpu(memoryMap, cpu);
memoryMap.WriteU32(0x4000208, 0x01); // Interrupt Master Enable
memoryMap.WriteU16(0x4000200, 0x0002); // IE = H-Blank IRQ enabled
memoryMap.WriteU16(0x4000004, 0xFF10); // DISPSTAT = H-Blank IRQ enabled, VCount = line 255
memoryMap.FlushMmio();
PpuUtil.TickPpuByAmount(ppu, 0, 240);
memoryMap.UpdateMmio();
Assert.Equal(0xFF12, memoryMap.ReadU16(0x4000004)); // H-Blank flag, H-Blank IRQ enabled
Assert.Equal(0x0002, memoryMap.ReadU16(0x4000202)); // IF = H-Count
Assert.Equal(CpuMode.Irq, cpu.CurrentStatus.Mode);
}