X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=Pico%2FVideoPort.c;h=6aabe88e471102589eebcbdd8ced851da3b2cc9b;hb=6a13ef3f56a80ac698d463f5d00235ea2a090f52;hp=7a38ea9c43af928445448702647978754c65c173;hpb=9761a7d0d41ad429d53c64ff35fe061c38092dbf;p=picodrive.git

diff --git a/Pico/VideoPort.c b/Pico/VideoPort.c
index 7a38ea9..6aabe88 100644
--- a/Pico/VideoPort.c
+++ b/Pico/VideoPort.c
@@ -1,7 +1,7 @@
-// This is part of Pico Library
+// PicoDrive
 
 // (c) Copyright 2004 Dave, All rights reserved.
-// (c) Copyright 2006-2007, Grazvydas "notaz" Ignotas
+// (c) Copyright 2006-2008, Grazvydas "notaz" Ignotas
 // Free for non-commercial use.
 
 // For commercial use, separate licencing terms must be obtained.
@@ -35,7 +35,9 @@ static void VideoWrite(u16 d)
   {
     case 1: if(a&1) d=(u16)((d<<8)|(d>>8)); // If address is odd, bytes are swapped (which game needs this?)
             Pico.vram [(a>>1)&0x7fff]=d;
-            rendstatus |= PDRAW_DIRTY_SPRITES; break;
+            if (a - ((unsigned)(Pico.video.reg[5]&0x7f) << 9) < 0x400)
+              rendstatus |= PDRAW_DIRTY_SPRITES;
+            break;
     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;
@@ -362,7 +364,8 @@ PICO_INTERNAL_ASM void PicoVideoWrite(unsigned int a,unsigned short d)
           SekCyclesBurn(32); // penalty // 488/12-8
           if (SekCycleCnt>=SekCycleAim) SekEndRun(0);
         }
-        elprintf(EL_ASVDP, "VDP data write: %04x {%i} #%i @ %06x", d, Pico.video.type, pvid->lwrite_cnt, SekPc);
+        elprintf(EL_ASVDP, "VDP data write: %04x [%06x] {%i} #%i @ %06x", d, Pico.video.addr,
+                 Pico.video.type, pvid->lwrite_cnt, SekPc);
       }
       VideoWrite(d);
     }
@@ -387,27 +390,28 @@ PICO_INTERNAL_ASM void PicoVideoWrite(unsigned int a,unsigned short d)
         // Register write:
         int num=(d>>8)&0x1f;
         int dold=pvid->reg[num];
-        int update_irq = 0, blank_on = 0;
+        int blank_on = 0;
         pvid->type=0; // register writes clear command (else no Sega logo in Golden Axe II)
         if (num > 0x0a && !(pvid->reg[1]&4)) {
           elprintf(EL_ANOMALY, "%02x written to reg %02x in SMS mode @ %06x", d, num, SekPc);
           return;
         }
 
+        if (num == 1 && !(d&0x40) && SekCyclesLeft > 390) blank_on = 1;
+        DrawSync(blank_on);
+        pvid->reg[num]=(unsigned char)d;
         switch (num)
         {
           case 0x00:
             elprintf(EL_INTSW, "hint_onoff: %i->%i [%i] pend=%i @ %06x", (dold&0x10)>>4,
                     (d&0x10)>>4, SekCyclesDone(), (pvid->pending_ints&0x10)>>4, SekPc);
-            update_irq = 1;
-            break;
+            goto update_irq;
           case 0x01:
             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 (!(d&0x40) && SekCyclesLeft > 390) blank_on = 1;
-            update_irq = 1;
-            break;
+            goto update_irq;
           case 0x05:
+            //elprintf(EL_STATUS, "spritep moved to %04x", (unsigned)(Pico.video.reg[5]&0x7f) << 9);
             if (d^dold) rendstatus |= PDRAW_SPRITES_MOVED;
             break;
           case 0x0c:
@@ -415,10 +419,9 @@ PICO_INTERNAL_ASM void PicoVideoWrite(unsigned int a,unsigned short d)
             if ((d^dold)&8) Pico.m.dirtyPal = 2;
             break;
         }
-        DrawSync(blank_on);
-        pvid->reg[num]=(unsigned char)d;
-        if (!update_irq) return;
+        return;
 
+update_irq:
 #ifndef EMU_CORE_DEBUG
         // update IRQ level
         if (!SekShouldInterrupt) // hack
@@ -486,7 +489,7 @@ PICO_INTERNAL_ASM unsigned int PicoVideoRead(unsigned int a)
   {
     unsigned int d;
     int lineCycles;
-    
+
     lineCycles = (488-SekCyclesLeft)&0x1ff;
     if (Pico.video.reg[12]&1)
          d = hcounts_40[lineCycles];