dma: more accurate ICR register handling

[pcsx_rearmed.git] / libpcsxcore / new_dynarec / pcsxmem.c

diff --git a/libpcsxcore/new_dynarec/pcsxmem.c b/libpcsxcore/new_dynarec/pcsxmem.c
index 8b6714b..601a6ee 100644 (file)
--- a/libpcsxcore/new_dynarec/pcsxmem.c
+++ b/libpcsxcore/new_dynarec/pcsxmem.c
@@ -179,8 +179,15 @@ static void io_write_imask32(u32 value)
 
 static void io_write_dma_icr32(u32 value)
 {
-       u32 tmp = ~value & HW_DMA_ICR;
-       HW_DMA_ICR = ((tmp ^ value) & 0xffffff) ^ tmp;
+       u32 tmp = value & 0x00ff803f;
+       tmp |= (SWAPu32(HW_DMA_ICR) & ~value) & 0x7f000000;
+       if ((tmp & HW_DMA_ICR_GLOBAL_ENABLE && tmp & 0x7f000000)
+           || tmp & HW_DMA_ICR_BUS_ERROR) {
+               if (!(SWAPu32(HW_DMA_ICR) & HW_DMA_ICR_IRQ_SENT))
+                       psxHu32ref(0x1070) |= SWAP32(8);
+               tmp |= HW_DMA_ICR_IRQ_SENT;
+       }
+       HW_DMA_ICR = SWAPu32(tmp);
 }
 
 #define make_dma_func(n) \