X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=libpcsxcore%2Fpsxhw.c;h=b8ca1996ae0f79d2a459c223a5069f506b9218e9;hb=9ed80467762a5024f7ba04e9fb384faceca35c29;hp=8be775bca0c8cf2307e1b73123510c511282528d;hpb=9a0a61d27586bfb93aa443cc59d9588d2b9cf992;p=pcsx_rearmed.git

diff --git a/libpcsxcore/psxhw.c b/libpcsxcore/psxhw.c
index 8be775bc..b8ca1996 100644
--- a/libpcsxcore/psxhw.c
+++ b/libpcsxcore/psxhw.c
@@ -41,8 +41,8 @@ void psxHwReset() {
 	mdecInit(); // initialize mdec decoder
 	cdrReset();
 	psxRcntInit();
-	HW_GPU_STATUS = SWAP32(0x14802000);
-	psxHwReadGpuSRptr = Config.hacks.gpu_busy_hack
+	HW_GPU_STATUS = SWAP32(0x10802000);
+	psxHwReadGpuSRptr = Config.hacks.gpu_busy
 		? psxHwReadGpuSRbusyHack : psxHwReadGpuSR;
 }
 
@@ -85,22 +85,28 @@ void psxHwWriteDmaIcr32(u32 value)
 
 void psxHwWriteGpuSR(u32 value)
 {
+	u32 old_sr = HW_GPU_STATUS, new_sr;
 	GPU_writeStatus(value);
 	gpuSyncPluginSR();
+	new_sr = HW_GPU_STATUS;
+	// "The Next Tetris" seems to rely on the field order after enable
+	if ((old_sr ^ new_sr) & new_sr & SWAP32(PSXGPU_ILACE))
+		frame_counter |= 1;
 }
 
 u32 psxHwReadGpuSR(void)
 {
-	u32 v;
+	u32 v, c = psxRegs.cycle;
 
 	// meh2, syncing for img bit, might want to avoid it..
 	gpuSyncPluginSR();
 	v = SWAP32(HW_GPU_STATUS);
+	v |= ((s32)(psxRegs.gpuIdleAfter - c) >> 31) & PSXGPU_nBUSY;
 
 	// XXX: because of large timeslices can't use hSyncCount, using rough
 	// approximization instead. Perhaps better use hcounter code here or something.
 	if (hSyncCount < 240 && (v & PSXGPU_ILACE_BITS) != PSXGPU_ILACE_BITS)
-		v |= PSXGPU_LCF & (psxRegs.cycle << 20);
+		v |= PSXGPU_LCF & (c << 20);
 	return v;
 }