step-frame added to debug

[picodrive.git] / Pico / VideoPort.c

diff --git a/Pico/VideoPort.c b/Pico/VideoPort.c
index 7a38ea9..6aabe88 100644 (file)
--- a/Pico/VideoPort.c
+++ b/Pico/VideoPort.c
@@ -1,7 +1,7 @@
-// This is part of Pico Library\r
+// PicoDrive\r
 \r
 // (c) Copyright 2004 Dave, All rights reserved.\r
-// (c) Copyright 2006-2007, Grazvydas "notaz" Ignotas\r
+// (c) Copyright 2006-2008, Grazvydas "notaz" Ignotas\r
 // Free for non-commercial use.\r
 \r
 // For commercial use, separate licencing terms must be obtained.\r
@@ -35,7 +35,9 @@ static void VideoWrite(u16 d)
   {\r
     case 1: if(a&1) d=(u16)((d<<8)|(d>>8)); // If address is odd, bytes are swapped (which game needs this?)\r
             Pico.vram [(a>>1)&0x7fff]=d;\r
-            rendstatus |= PDRAW_DIRTY_SPRITES; break;\r
+            if (a - ((unsigned)(Pico.video.reg[5]&0x7f) << 9) < 0x400)\r
+              rendstatus |= PDRAW_DIRTY_SPRITES;\r
+            break;\r
     case 3: Pico.m.dirtyPal = 1;\r
             Pico.cram [(a>>1)&0x003f]=d; break; // wraps (Desert Strike)\r
     case 5: Pico.vsram[(a>>1)&0x003f]=d; break;\r
@@ -362,7 +364,8 @@ PICO_INTERNAL_ASM void PicoVideoWrite(unsigned int a,unsigned short d)
           SekCyclesBurn(32); // penalty // 488/12-8\r
           if (SekCycleCnt>=SekCycleAim) SekEndRun(0);\r
         }\r
-        elprintf(EL_ASVDP, "VDP data write: %04x {%i} #%i @ %06x", d, Pico.video.type, pvid->lwrite_cnt, SekPc);\r
+        elprintf(EL_ASVDP, "VDP data write: %04x [%06x] {%i} #%i @ %06x", d, Pico.video.addr,\r
+                 Pico.video.type, pvid->lwrite_cnt, SekPc);\r
       }\r
       VideoWrite(d);\r
     }\r
@@ -387,27 +390,28 @@ PICO_INTERNAL_ASM void PicoVideoWrite(unsigned int a,unsigned short d)
         // Register write:\r
         int num=(d>>8)&0x1f;\r
         int dold=pvid->reg[num];\r
-        int update_irq = 0, blank_on = 0;\r
+        int blank_on = 0;\r
         pvid->type=0; // register writes clear command (else no Sega logo in Golden Axe II)\r
         if (num > 0x0a && !(pvid->reg[1]&4)) {\r
           elprintf(EL_ANOMALY, "%02x written to reg %02x in SMS mode @ %06x", d, num, SekPc);\r
           return;\r
         }\r
 \r
+        if (num == 1 && !(d&0x40) && SekCyclesLeft > 390) blank_on = 1;\r
+        DrawSync(blank_on);\r
+        pvid->reg[num]=(unsigned char)d;\r
         switch (num)\r
         {\r
           case 0x00:\r
             elprintf(EL_INTSW, "hint_onoff: %i->%i [%i] pend=%i @ %06x", (dold&0x10)>>4,\r
                     (d&0x10)>>4, SekCyclesDone(), (pvid->pending_ints&0x10)>>4, SekPc);\r
-            update_irq = 1;\r
-            break;\r
+            goto update_irq;\r
           case 0x01:\r
             elprintf(EL_INTSW, "vint_onoff: %i->%i [%i] pend=%i @ %06x", (dold&0x20)>>5,\r
                     (d&0x20)>>5, SekCyclesDone(), (pvid->pending_ints&0x20)>>5, SekPc);\r
-            if (!(d&0x40) && SekCyclesLeft > 390) blank_on = 1;\r
-            update_irq = 1;\r
-            break;\r
+            goto update_irq;\r
           case 0x05:\r
+            //elprintf(EL_STATUS, "spritep moved to %04x", (unsigned)(Pico.video.reg[5]&0x7f) << 9);\r
             if (d^dold) rendstatus |= PDRAW_SPRITES_MOVED;\r
             break;\r
           case 0x0c:\r
@@ -415,10 +419,9 @@ PICO_INTERNAL_ASM void PicoVideoWrite(unsigned int a,unsigned short d)
             if ((d^dold)&8) Pico.m.dirtyPal = 2;\r
             break;\r
         }\r
-        DrawSync(blank_on);\r
-        pvid->reg[num]=(unsigned char)d;\r
-        if (!update_irq) return;\r
+        return;\r
 \r
+update_irq:\r
 #ifndef EMU_CORE_DEBUG\r
         // update IRQ level\r
         if (!SekShouldInterrupt) // hack\r
@@ -486,7 +489,7 @@ PICO_INTERNAL_ASM unsigned int PicoVideoRead(unsigned int a)
   {\r
     unsigned int d;\r
     int lineCycles;\r
-    \r
+\r
     lineCycles = (488-SekCyclesLeft)&0x1ff;\r
     if (Pico.video.reg[12]&1)\r
          d = hcounts_40[lineCycles];\r