diff options
| author | SND\shalma_cp <SND\shalma_cp@e17a0e51-4ae3-4d35-97c3-1a29b211df97> | 2010-09-05 01:11:09 +0000 |
|---|---|---|
| committer | SND\shalma_cp <SND\shalma_cp@e17a0e51-4ae3-4d35-97c3-1a29b211df97> | 2010-09-05 01:11:09 +0000 |
| commit | dcc46e2d3011f7de48d6c16144088d1f3d4ed2db (patch) | |
| tree | 668a6d8b7f9c86c47f367a1624088f8dbaee34d4 /libpcsxcore/gpu.c | |
| parent | 37edbb7d48a17b7321ebeb5bcf992c7d77fd2662 (diff) | |
| download | pcsxr-dcc46e2d3011f7de48d6c16144088d1f3d4ed2db.tar.gz | |
Chrono Cross interlace fix (ePSXe version)
GameShark Lite needs GPUSTATUS_READYFORVRAM off when not IDLE. Also fixes CDROM swapping.
- Enable 'Fake GPU Busy States' to work
- Perhaps we should fix PEOPS GPU to turn off READYFORVRAM instead of gpu.c (my temp solution)
Please add gpu.c / gpu.h to your makefiles.
git-svn-id: https://pcsxr.svn.codeplex.com/svn/pcsxr@56824 e17a0e51-4ae3-4d35-97c3-1a29b211df97
Diffstat (limited to 'libpcsxcore/gpu.c')
| -rw-r--r-- | libpcsxcore/gpu.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/libpcsxcore/gpu.c b/libpcsxcore/gpu.c new file mode 100644 index 00000000..ca26e926 --- /dev/null +++ b/libpcsxcore/gpu.c @@ -0,0 +1,198 @@ +#include "psxhw.h"
+#include "gpu.h"
+#include "psxdma.h"
+
+extern unsigned int hSyncCount;
+
+
+#define GPUSTATUS_ODDLINES 0x80000000
+#define GPUSTATUS_DMABITS 0x60000000 // Two bits
+#define GPUSTATUS_READYFORCOMMANDS 0x10000000
+#define GPUSTATUS_READYFORVRAM 0x08000000
+#define GPUSTATUS_IDLE 0x04000000
+
+#define GPUSTATUS_DISPLAYDISABLED 0x00800000
+#define GPUSTATUS_INTERLACED 0x00400000
+#define GPUSTATUS_RGB24 0x00200000
+#define GPUSTATUS_PAL 0x00100000
+#define GPUSTATUS_DOUBLEHEIGHT 0x00080000
+#define GPUSTATUS_WIDTHBITS 0x00070000 // Three bits
+#define GPUSTATUS_MASKENABLED 0x00001000
+#define GPUSTATUS_MASKDRAWN 0x00000800
+#define GPUSTATUS_DRAWINGALLOWED 0x00000400
+#define GPUSTATUS_DITHER 0x00000200
+
+
+// Taken from PEOPS SOFTGPU
+unsigned long lUsedAddr[3];
+
+char CheckForEndlessLoop(unsigned long laddr)
+{
+ if(laddr==lUsedAddr[1]) return 1;
+ if(laddr==lUsedAddr[2]) return 1;
+
+ if(laddr<lUsedAddr[0]) lUsedAddr[1]=laddr;
+ else lUsedAddr[2]=laddr;
+ lUsedAddr[0]=laddr;
+ return 0;
+}
+
+long gpuDmaChain(unsigned long *baseAddrL, unsigned long addr)
+{
+ unsigned long dmaMem;
+ unsigned char *baseAddrB;
+ short count;unsigned int DMACommandCounter = 0;
+ int size;
+
+ size = 0;
+ lUsedAddr[0]=lUsedAddr[1]=lUsedAddr[2]=0xffffff;
+
+ baseAddrB = (unsigned char*) baseAddrL;
+
+ do
+ {
+ // Only Zinc = 1024
+ //if(iGPUHeight==512) addr&=0x1FFFFC;
+
+ addr&=0x1FFFFC;
+ if(DMACommandCounter++ > 2000000) break;
+ if(CheckForEndlessLoop(addr)) break;
+
+ count = baseAddrB[addr+3];
+ size += 4;
+ size += count;
+
+ dmaMem=addr+4;
+
+ //if(count>0) GPUwriteDataMem(&baseAddrL[dmaMem>>2],count);
+
+ addr = baseAddrL[addr>>2]&0xffffff;
+ }
+ while (addr != 0xffffff);
+
+
+ return size;
+}
+
+
+int gpuReadStatus()
+{
+ int hard;
+
+
+ // GPU plugin
+ hard = GPU_readStatus();
+
+
+ // ePSXe 1.7.0 - Chrono Cross interlace hack
+ if (hard & 0x400000) {
+ switch (Config.PsxType) {
+ case PSX_TYPE_NTSC:
+ if (hSyncCount > 262 - 240) hard ^= 0x80000000;
+ break;
+
+ case PSX_TYPE_PAL:
+ if (hSyncCount > 312 - 256) hard ^= 0x80000000;
+ break;
+ }
+ }
+
+
+ // NOTE:
+ // Backup option when plugins fail to simulate 'busy gpu'
+
+ // TODO:
+ // Check this with
+ // - Hot wheels turbo racing
+ // - Dukes of Hazzard
+
+#if 1
+ if( HW_DMA2_CHCR & 0x01000000 )
+ {
+ hard &= ~GPUSTATUS_IDLE;
+ hard &= ~GPUSTATUS_READYFORCOMMANDS;
+ }
+#endif
+
+
+ // Gameshark Lite - wants to see VRAM busy
+ // - Must enable GPU 'Fake Busy States' hack
+ if( (hard & GPUSTATUS_IDLE) == 0 )
+ hard &= ~GPUSTATUS_READYFORVRAM;
+
+ return hard;
+}
+
+
+
+void psxDma2(u32 madr, u32 bcr, u32 chcr) { // GPU
+ u32 *ptr;
+ u32 size;
+
+ switch(chcr) {
+ case 0x01000200: // vram2mem
+#ifdef PSXDMA_LOG
+ PSXDMA_LOG("*** DMA2 GPU - vram2mem *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
+#endif
+ ptr = (u32 *)PSXM(madr);
+ if (ptr == NULL) {
+#ifdef CPU_LOG
+ CPU_LOG("*** DMA2 GPU - vram2mem *** NULL Pointer!!!\n");
+#endif
+ break;
+ }
+ size = (bcr >> 16) * (bcr & 0xffff);
+ GPU_readDataMem(ptr, size);
+ psxCpu->Clear(madr, size);
+
+ GPUDMA_INT( size / 4 );
+ return;
+
+
+ case 0x01000201: // mem2vram
+#ifdef PSXDMA_LOG
+ PSXDMA_LOG("*** DMA 2 - GPU mem2vram *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
+#endif
+ ptr = (u32 *)PSXM(madr);
+ if (ptr == NULL) {
+#ifdef CPU_LOG
+ CPU_LOG("*** DMA2 GPU - mem2vram *** NULL Pointer!!!\n");
+#endif
+ break;
+ }
+ size = (bcr >> 16) * (bcr & 0xffff);
+ GPU_writeDataMem(ptr, size);
+
+ GPUDMA_INT( size / 4 );
+ return;
+
+
+
+ case 0x01000401: // dma chain
+#ifdef PSXDMA_LOG
+ PSXDMA_LOG("*** DMA 2 - GPU dma chain *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
+#endif
+ GPU_dmaChain((u32 *)psxM, madr & 0x1fffff);
+
+ // FIXME!! GPU DMA chain walking
+ GPUDMA_INT( 0x4000 / 4 );
+ return;
+
+
+#ifdef PSXDMA_LOG
+ default:
+ PSXDMA_LOG("*** DMA 2 - GPU unknown *** %lx addr = %lx size = %lx\n", chcr, madr, bcr);
+ break;
+#endif
+ }
+
+ HW_DMA2_CHCR &= SWAP32(~0x01000000);
+ DMA_INTERRUPT(2);
+}
+
+
+
+void gpuInterrupt() {
+ HW_DMA2_CHCR &= SWAP32(~0x01000000);
+ DMA_INTERRUPT(2);
+}
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