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* HBlank flag and IRQ.

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* VBlank and HBlank DMA.
This commit is contained in:
StapleButter
2017-02-03 18:47:40 +01:00
parent f4335b9292
commit 1f691f3795
6 changed files with 46 additions and 16 deletions
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28
GPU.cpp
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@ -26,6 +26,7 @@ namespace GPU
{
#define LINE_CYCLES (355*6)
#define HBLANK_CYCLES (256*6)
#define FRAME_CYCLES (LINE_CYCLES * 263)
u16 VCount;
@ -756,10 +757,27 @@ void StartFrame()
StartScanline(0);
}
void StartHBlank(u32 line)
{
DispStat[0] |= (1<<1);
DispStat[1] |= (1<<1);
NDS::CheckDMAs(0, 0x02);
if (DispStat[0] & (1<<4)) NDS::TriggerIRQ(0, NDS::IRQ_HBlank);
if (DispStat[1] & (1<<4)) NDS::TriggerIRQ(1, NDS::IRQ_HBlank);
if (line < 262)
NDS::ScheduleEvent(NDS::Event_LCD, true, (LINE_CYCLES - HBLANK_CYCLES), StartScanline, line+1);
}
void StartScanline(u32 line)
{
VCount = line;
DispStat[0] &= ~(1<<1);
DispStat[1] &= ~(1<<1);
if (line == VMatch[0])
{
DispStat[0] |= (1<<2);
@ -785,7 +803,6 @@ void StartScanline(u32 line)
GPU2D_B->DrawScanline(line);
//NDS::ScheduleEvent(LINE_CYCLES, StartScanline, line+1);
NDS::ScheduleEvent(NDS::Event_ScanlineStart, true, LINE_CYCLES, StartScanline, line+1);
}
else if (line == 262)
{
@ -802,13 +819,18 @@ void StartScanline(u32 line)
DispStat[0] |= (1<<0);
DispStat[1] |= (1<<0);
NDS::CheckDMAs(0, 0x01);
NDS::CheckDMAs(1, 0x11);
if (DispStat[0] & (1<<3)) NDS::TriggerIRQ(0, NDS::IRQ_VBlank);
if (DispStat[1] & (1<<3)) NDS::TriggerIRQ(1, NDS::IRQ_VBlank);
}
//NDS::ScheduleEvent(LINE_CYCLES, StartScanline, line+1);
NDS::ScheduleEvent(NDS::Event_ScanlineStart, true, LINE_CYCLES, StartScanline, line+1);
//NDS::ScheduleEvent(NDS::Event_LCD, true, LINE_CYCLES, StartScanline, line+1);
}
NDS::ScheduleEvent(NDS::Event_LCD, true, HBLANK_CYCLES, StartHBlank, line);
}
@ -819,8 +841,6 @@ void SetDispStat(u32 cpu, u16 val)
DispStat[cpu] |= val;
VMatch[cpu] = (val >> 8) | ((val & 0x80) << 1);
if (val & 0x10) printf("!! HBLANK ENABLED\n");
}
}