X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;ds=sidebyside;f=Pico%2FVideoPort.c;h=e3643df8879b88f330d4df68bee7e1ec3f0093e9;hb=cea6590346640236914eeff840401c55db8a77ce;hp=b7a05f0515e97d24d56b0dc1be1e2ae0b8eb2d82;hpb=e11c55481f1703298b3e7e213f73cec8a136f974;p=picodrive.git

diff --git a/Pico/VideoPort.c b/Pico/VideoPort.c
index b7a05f0..e3643df 100644
--- a/Pico/VideoPort.c
+++ b/Pico/VideoPort.c
@@ -139,15 +139,24 @@ static void DmaSlow(int len)
   {
     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;