* that GPU plugin doesn't.
*/
-#define PSXGPU_LCF (1<<31)
-#define PSXGPU_nBUSY (1<<26)
-#define PSXGPU_ILACE (1<<22)
+#define PSXGPU_LCF (1<<31)
+#define PSXGPU_nBUSY (1<<26)
+#define PSXGPU_ILACE (1<<22)
+#define PSXGPU_DHEIGHT (1<<19)
+
+// both must be set for interlace to work
+#define PSXGPU_ILACE_BITS (PSXGPU_ILACE | PSXGPU_DHEIGHT)
#define HW_GPU_STATUS psxHu32ref(0x1814)
static u32 io_gpu_read_status(void)
{
+ u32 v;
+
// meh2, syncing for img bit, might want to avoid it..
gpuSyncPluginSR();
- return HW_GPU_STATUS;
+ v = HW_GPU_STATUS;
+
+ // XXX: because of large timeslices can't use hSyncCount, using rough
+ // approximization instead. Perhaps better use hcounter code here or something.
+ if (hSyncCount < 240 && (HW_GPU_STATUS & PSXGPU_ILACE_BITS) != PSXGPU_ILACE_BITS)
+ v |= PSXGPU_LCF & (psxRegs.cycle << 20);
+ return v;
}
static void io_gpu_write_status(u32 value)
static const u32 CountToTarget = 1;
static const u32 FrameRate[] = { 60, 50 };
-static const u32 VBlankStart[] = { 240, 256 };
static const u32 HSyncTotal[] = { 263, 313 };
static const u32 SpuUpdInterval[] = { 32, 32 };
+#define VBlankStart 240
#define VERBOSE_LEVEL 0
static const s32 VerboseLevel = VERBOSE_LEVEL;
}
// VSync irq.
- if( hSyncCount == VBlankStart[Config.PsxType] )
+ if( hSyncCount == VBlankStart )
{
- if( !(HW_GPU_STATUS & PSXGPU_ILACE) )
- HW_GPU_STATUS |= PSXGPU_LCF;
+ HW_GPU_STATUS &= ~PSXGPU_LCF;
setIrq( 0x01 );
hSyncCount = 0;
frame_counter++;
- HW_GPU_STATUS &= ~PSXGPU_LCF;
- if( HW_GPU_STATUS & PSXGPU_ILACE )
+ gpuSyncPluginSR();
+ if( (HW_GPU_STATUS & PSXGPU_ILACE_BITS) == PSXGPU_ILACE_BITS )
HW_GPU_STATUS |= frame_counter << 31;
}
// Schedule next call, in hsyncs
hsync_steps = SpuUpdInterval[Config.PsxType] - spuSyncCount;
- next_vsync = VBlankStart[Config.PsxType] - hSyncCount; // ok to overflow
+ next_vsync = VBlankStart - hSyncCount; // ok to overflow
next_lace = HSyncTotal[Config.PsxType] - hSyncCount;
if( next_vsync && next_vsync < hsync_steps )
hsync_steps = next_vsync;