X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=Pico%2FVideoPort.c;h=cceab7c7cb6e6a79e92ddad5b2d13b320a7aba4d;hb=fad248933b6676d30ccf419858b4ee10cc123fc5;hp=5840bc713d6e54f5bc100e51fa58ac11816e2e13;hpb=03e4f2a349247334666c87abe3a908df72d23051;p=picodrive.git

diff --git a/Pico/VideoPort.c b/Pico/VideoPort.c
index 5840bc7..cceab7c 100644
--- a/Pico/VideoPort.c
+++ b/Pico/VideoPort.c
@@ -22,6 +22,7 @@ typedef unsigned int   u32;
 #define UTYPES_DEFINED
 #endif
 
+int (*PicoDmaHook)(unsigned int source, int len, unsigned short **srcp, unsigned short **limitp) = NULL;
 
 static __inline void AutoIncrement(void)
 {
@@ -40,7 +41,7 @@ static void VideoWrite(u16 d)
     case 3: Pico.m.dirtyPal = 1;
             Pico.cram [(a>>1)&0x003f]=d; break; // wraps (Desert Strike)
     case 5: Pico.vsram[(a>>1)&0x003f]=d; break;
-    default:elprintf(EL_ANOMALY, "VDP write %04x with bad type %i", d, Pico.video.type); break;
+    //default:elprintf(EL_ANOMALY, "VDP write %04x with bad type %i", d, Pico.video.type); break;
   }
 
   //dprintf("w[%i] @ %04x, inc=%i [%i|%i]", Pico.video.type, a, Pico.video.reg[0xf], Pico.m.scanline, SekCyclesDone());
@@ -104,7 +105,7 @@ static void DmaSlow(int len)
   if ((source&0xe00000)==0xe00000) { // Ram
     pd=(u16 *)(Pico.ram+(source&0xfffe));
     pdend=(u16 *)(Pico.ram+0x10000);
-  } else if(PicoMCD & 1) {
+  } else if (PicoMCD & 1) {
     elprintf(EL_VDPDMA, "DmaSlow CD, r3=%02x", Pico_mcd->s68k_regs[3]);
     if(source<0x20000) { // Bios area
       pd=(u16 *)(Pico_mcd->bios+(source&~1));
@@ -133,10 +134,13 @@ static void DmaSlow(int len)
       return;
     }
   } else {
-    if(source<Pico.romsize) { // Rom
+    // if we have DmaHook, let it handle ROM because of possible DMA delay
+    if (PicoDmaHook && PicoDmaHook(source, len, &pd, &pdend));
+    else if (source<Pico.romsize) { // Rom
       pd=(u16 *)(Pico.rom+(source&~1));
       pdend=(u16 *)(Pico.rom+Pico.romsize);
-    } else {
+    }
+    else {
       elprintf(EL_VDPDMA|EL_ANOMALY, "DmaSlow[%i] %06x->%04x: invalid src", Pico.video.type, source, a);
       return;
     }
@@ -367,19 +371,24 @@ PICO_INTERNAL_ASM void PicoVideoWrite(unsigned int a,unsigned short d)
       {
         // Register write:
         int num=(d>>8)&0x1f;
-        if(num==00) elprintf(EL_INTSW, "hint_onoff: %i->%i [%i] pend=%i @ %06x", (pvid->reg[0]&0x10)>>4,
+        int dold=pvid->reg[num];
+        if (num > 0x0a && !(pvid->reg[1]&4)) {
+          elprintf(EL_ANOMALY, "%02x written to reg %02x in SMS mode @ %06x", d, num, SekPc);
+        } else
+	  pvid->reg[num]=(unsigned char)d;
+        if (num==00) elprintf(EL_INTSW, "hint_onoff: %i->%i [%i] pend=%i @ %06x", (dold&0x10)>>4,
                         (d&0x10)>>4, SekCyclesDone(), (pvid->pending_ints&0x10)>>4, SekPc);
-        if(num==01) elprintf(EL_INTSW, "vint_onoff: %i->%i [%i] pend=%i @ %06x", (pvid->reg[1]&0x20)>>5,
+        if (num==01) elprintf(EL_INTSW, "vint_onoff: %i->%i [%i] pend=%i @ %06x", (dold&0x20)>>5,
                         (d&0x20)>>5, SekCyclesDone(), (pvid->pending_ints&0x20)>>5, SekPc);
-        //if(num==01) dprintf("set_blank: %i @ %06x [%i|%i]", !((d&0x40)>>6), SekPc, Pico.m.scanline, SekCyclesDone());
-        //if(num==10) dprintf("hint_set: %i @ %06x [%i|%i]", (unsigned char)d, SekPc, Pico.m.scanline, SekCyclesDone());
-        pvid->reg[num]=(unsigned char)d;
+        if      (num ==   5 && (d^dold)) rendstatus|=1;
+        // renderers should update their palettes if sh/hi mode is changed
+        else if (num == 0xc && ((d^dold)&8)) Pico.m.dirtyPal = 2;
 #ifndef EMU_CORE_DEBUG
         // update IRQ level (Lemmings, Wiz 'n' Liz intro, ... )
         // may break if done improperly:
         // International Superstar Soccer Deluxe (crash), Street Racer (logos), Burning Force (gfx),
         // Fatal Rewind (crash), Sesame Street Counting Cafe
-        if (num < 2)
+        else if (num < 2)
         {
           if (!SekShouldInterrupt) // hack
           {
@@ -390,13 +399,10 @@ PICO_INTERNAL_ASM void PicoVideoWrite(unsigned int a,unsigned short d)
             else if(pints & 0x10) irq = 4;
             SekInterrupt(irq); // update line
 
-            if (irq) SekEndRun(24); // make it delayed
+            if (irq && Pico.m.scanline!=-1) SekEndRun(24); // make it delayed
           }
         }
-        else
 #endif
-        if(num == 5) rendstatus|=1;
-        else if(num == 0xc) Pico.m.dirtyPal = 2; // renderers should update their palettes if sh/hi mode is changed
         pvid->type=0; // register writes clear command (else no Sega logo in Golden Axe II)
       } else {
         // High word of command: