improve field status after enable

[pcsx_rearmed.git] / libpcsxcore / psxhw.c

diff --git a/libpcsxcore/psxhw.c b/libpcsxcore/psxhw.c
index 4811f99..832e6d7 100644 (file)
--- a/libpcsxcore/psxhw.c
+++ b/libpcsxcore/psxhw.c
@@ -85,8 +85,13 @@ 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)