X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=Pico%2FVideoPort.c;h=a4fe3c88bf740add99aa09a8df6de847ca64d839;hb=e5f426aa2e86d56357b8af2795e73cc0c9b17e8f;hp=537e917a837e334fcedf317e4c9127950fbee4e2;hpb=bf098bc53228f6b5016cb4a6126f4466bfba4e00;p=picodrive.git

diff --git a/Pico/VideoPort.c b/Pico/VideoPort.c
index 537e917..a4fe3c8 100644
--- a/Pico/VideoPort.c
+++ b/Pico/VideoPort.c
@@ -1,20 +1,26 @@
 // This is part of Pico Library
 
 // (c) Copyright 2004 Dave, All rights reserved.
-// (c) Copyright 2006 notaz, All rights reserved.
+// (c) Copyright 2006-2007, Grazvydas "notaz" Ignotas
 // Free for non-commercial use.
 
 // For commercial use, separate licencing terms must be obtained.
 
 
 #include "PicoInt.h"
+#include "cd/gfx_cd.h"
 
 extern const unsigned char  hcounts_32[];
 extern const unsigned char  hcounts_40[];
 extern const unsigned short vcounts[];
 extern int rendstatus;
 
+#ifndef UTYPES_DEFINED
+typedef unsigned char  u8;
 typedef unsigned short u16;
+typedef unsigned int   u32;
+#define UTYPES_DEFINED
+#endif
 
 
 static __inline void AutoIncrement()
@@ -87,34 +93,82 @@ static void DmaSlow(int len)
 
   if(Pico.m.scanline != -1) {
     Pico.m.dma_bytes += len;
-    SekSetCyclesLeft(SekCyclesLeft - CheckDMA());
+    if ((PicoMCD&1) && (PicoOpt & 0x2000)) SekCyclesBurn(CheckDMA());
+    else SekSetCyclesLeftNoMCD(SekCyclesLeftNoMCD - CheckDMA());
   } else {
     // be approximate in non-accurate mode
     SekSetCyclesLeft(SekCyclesLeft - (len*(((488<<8)/167))>>8));
   }
 
-  if ((source&0xe00000)==0xe00000) { pd=(u16 *)(Pico.ram+(source&0xfffe)); pdend=(u16 *)(Pico.ram+0x10000); } // Ram
-  else if(PicoMCD & 1) {
-    if(source<0x20000) { pd=(u16 *)(Pico_mcd->bios+(source&~1)); pdend=(u16 *)(Pico_mcd->bios+0x20000); } // Bios area
-    else { dprintf("unsupported src"); return; } // Invalid source address
+  if ((source&0xe00000)==0xe00000) { // Ram
+    pd=(u16 *)(Pico.ram+(source&0xfffe));
+    pdend=(u16 *)(Pico.ram+0x10000);
+  } else if(PicoMCD & 1) {
+    dprintf("DmaSlow CD, r3=%02x", Pico_mcd->s68k_regs[3]);
+    if(source<0x20000) { // Bios area
+      pd=(u16 *)(Pico_mcd->bios+(source&~1));
+      pdend=(u16 *)(Pico_mcd->bios+0x20000);
+    } else if ((source&0xfc0000)==0x200000) { // Word Ram
+      source -= 2;
+      if (!(Pico_mcd->s68k_regs[3]&4)) { // 2M mode
+        pd=(u16 *)(Pico_mcd->word_ram2M+(source&0x3fffe));
+        pdend=(u16 *)(Pico_mcd->word_ram2M+0x40000);
+      } else {
+        if (source < 0x220000) { // 1M mode
+          int bank = Pico_mcd->s68k_regs[3]&1;
+          pd=(u16 *)(Pico_mcd->word_ram1M[bank]+(source&0x1fffe));
+          pdend=(u16 *)(Pico_mcd->word_ram1M[bank]+0x20000);
+	} else {
+          DmaSlowCell(source, a, len, inc);
+          return;
+	}
+      }
+    } else if ((source&0xfe0000)==0x020000) { // Prg Ram
+      u8 *prg_ram = Pico_mcd->prg_ram_b[Pico_mcd->s68k_regs[3]>>6];
+      pd=(u16 *)(prg_ram+(source&0x1fffe));
+      pdend=(u16 *)(prg_ram+0x20000);
+    } else {
+      dprintf("DmaSlow FIXME: unsupported src");
+      return;
+    }
   } else {
-    if(source<Pico.romsize) { pd=(u16 *)(Pico.rom+(source&~1)); pdend=(u16 *)(Pico.rom+Pico.romsize); } // Rom
-    else { dprintf("invalid dma src"); return; } // Invalid source address
+    if(source<Pico.romsize) { // Rom
+      pd=(u16 *)(Pico.rom+(source&~1));
+      pdend=(u16 *)(Pico.rom+Pico.romsize);
+    } else {
+      dprintf("DmaSlow: invalid dma src");
+      return;
+    }
+  }
+
+  // overflow protection, might break something..
+  if (len > pdend - pd) {
+    len = pdend - pd;
+    dprintf("DmaSlow overflow");
   }
 
   switch (Pico.video.type)
   {
     case 1: // vram
       r = Pico.vram;
-      for(; len; len--)
+      if (inc == 2 && !(a&1) && a+len*2 < 0x10000)
       {
-        d=*pd++;
-        if(a&1) d=(d<<8)|(d>>8);
-        r[a>>1] = (u16)d; // will drop the upper bits
-        // AutoIncrement
-        a=(u16)(a+inc);
-        // didn't src overlap?
-        if(pd >= pdend) pd-=0x8000; // should be good for RAM, bad for ROM
+        // most used DMA mode
+        memcpy16(r + (a>>1), pd, len);
+        a += len*2;
+      }
+      else
+      {
+        for(; len; len--)
+        {
+          d=*pd++;
+          if(a&1) d=(d<<8)|(d>>8);
+          r[a>>1] = (u16)d; // will drop the upper bits
+          // AutoIncrement
+          a=(u16)(a+inc);
+          // didn't src overlap?
+          //if(pd >= pdend) pd-=0x8000; // should be good for RAM, bad for ROM
+        }
       }
       rendstatus|=0x10;
       break;
@@ -124,11 +178,11 @@ static void DmaSlow(int len)
       r = Pico.cram;
       for(a2=a&0x7f; len; len--)
       {
-        r[a2>>1] = (u16)*pd++;; // bit 0 is ignored
+        r[a2>>1] = (u16)*pd++; // bit 0 is ignored
         // AutoIncrement
         a2+=inc;
         // didn't src overlap?
-        if(pd >= pdend) pd-=0x8000;
+        //if(pd >= pdend) pd-=0x8000;
         // good dest?
         if(a2 >= 0x80) break; // Todds Adventures in Slime World / Andre Agassi tennis
       }
@@ -143,7 +197,7 @@ static void DmaSlow(int len)
         // AutoIncrement
         a2+=inc;
         // didn't src overlap?
-        if(pd >= pdend) pd-=0x8000;
+        //if(pd >= pdend) pd-=0x8000;
         // good dest?
         if(a2 >= 0x80) break;
       }
@@ -258,7 +312,7 @@ static void CommandChange()
   if (cmd&0x80) CommandDma();
 }
 
-void PicoVideoWrite(unsigned int a,unsigned short d)
+PICO_INTERNAL_ASM void PicoVideoWrite(unsigned int a,unsigned short d)
 {
   struct PicoVideo *pvid=&Pico.video;
 
@@ -340,7 +394,7 @@ void PicoVideoWrite(unsigned int a,unsigned short d)
   }
 }
 
-unsigned int PicoVideoRead(unsigned int a)
+PICO_INTERNAL_ASM unsigned int PicoVideoRead(unsigned int a)
 {
   unsigned int d=0;