more wip SVP code

[picodrive.git] / Pico / VideoPort.c

diff --git a/Pico/VideoPort.c b/Pico/VideoPort.c
index 5840bc7..1065618 100644 (file)
--- a/Pico/VideoPort.c
+++ b/Pico/VideoPort.c
@@ -22,6 +22,7 @@ typedef unsigned int   u32;
 #define UTYPES_DEFINED\r
 #endif\r
 \r
+int (*PicoDmaHook)(unsigned int source, unsigned short **srcp, unsigned short **limitp) = NULL;\r
 \r
 static __inline void AutoIncrement(void)\r
 {\r
@@ -104,7 +105,7 @@ static void DmaSlow(int len)
   if ((source&0xe00000)==0xe00000) { // Ram\r
     pd=(u16 *)(Pico.ram+(source&0xfffe));\r
     pdend=(u16 *)(Pico.ram+0x10000);\r
-  } else if(PicoMCD & 1) {\r
+  } else if (PicoMCD & 1) {\r
     elprintf(EL_VDPDMA, "DmaSlow CD, r3=%02x", Pico_mcd->s68k_regs[3]);\r
     if(source<0x20000) { // Bios area\r
       pd=(u16 *)(Pico_mcd->bios+(source&~1));\r
@@ -133,10 +134,12 @@ static void DmaSlow(int len)
       return;\r
     }\r
   } else {\r
-    if(source<Pico.romsize) { // Rom\r
+    if (source<Pico.romsize) { // Rom\r
       pd=(u16 *)(Pico.rom+(source&~1));\r
       pdend=(u16 *)(Pico.rom+Pico.romsize);\r
-    } else {\r
+    }\r
+    else if (PicoDmaHook && PicoDmaHook(source, &pd, &pdend));\r
+    else {\r
       elprintf(EL_VDPDMA|EL_ANOMALY, "DmaSlow[%i] %06x->%04x: invalid src", Pico.video.type, source, a);\r
       return;\r
     }\r