X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=pico%2Fvideoport.c;h=fe96139f05c7158582c9a6593e5fe05ab09388f3;hb=12f89605e36fe5e901b28bf85f246faa128cbdfe;hp=3f26d581ecb13b56918b35e377d10edbea9836a4;hpb=0c7d1ba332b26f4ac67199e8ecbb826651f8512a;p=picodrive.git

diff --git a/pico/videoport.c b/pico/videoport.c
index 3f26d58..fe96139 100644
--- a/pico/videoport.c
+++ b/pico/videoport.c
@@ -29,6 +29,13 @@ static __inline void AutoIncrement(void)
   Pico.video.addr=(unsigned short)(Pico.video.addr+Pico.video.reg[0xf]);
 }
 
+static NOINLINE void VideoWrite128(u32 a, u16 d)
+{
+  // nasty
+  a = ((a & 2) >> 1) | ((a & 0x400) >> 9) | (a & 0x3FC) | ((a & 0x1F800) >> 1);
+  ((u8 *)Pico.vram)[a] = d;
+}
+
 static void VideoWrite(u16 d)
 {
   unsigned int a=Pico.video.addr;
@@ -43,6 +50,10 @@ 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;
+    case 0x81:
+      a |= Pico.video.addr_u << 16;
+      VideoWrite128(a, d);
+      break;
     //default:elprintf(EL_ANOMALY, "VDP write %04x with bad type %i", d, Pico.video.type); break;
   }
 
@@ -186,6 +197,17 @@ static void DmaSlow(int len, unsigned int source)
       }
       break;
 
+    case 0x81: // vram 128k
+      a |= Pico.video.addr_u << 16;
+      for(; len; len--)
+      {
+        VideoWrite128(a, base[source++ & mask]);
+        // AutoIncrement
+        a = (a + inc) & 0x1ffff;
+      }
+      Pico.video.addr_u = a >> 16;
+      break;
+
     default:
       if (Pico.video.type != 0 || (EL_LOGMASK & EL_VDPDMA))
         elprintf(EL_VDPDMA|EL_ANOMALY, "DMA with bad type %i", Pico.video.type);
@@ -303,20 +325,23 @@ static NOINLINE void CommandDma(void)
   Pico.video.reg[0x16] = source >> 8;
 }
 
-static void CommandChange(void)
+static NOINLINE void CommandChange(void)
 {
-  struct PicoVideo *pvid=&Pico.video;
-  unsigned int cmd=0,addr=0;
+  struct PicoVideo *pvid = &Pico.video;
+  unsigned int cmd, addr;
 
-  cmd=pvid->command;
+  cmd = pvid->command;
 
   // Get type of transfer 0xc0000030 (v/c/vsram read/write)
-  pvid->type=(unsigned char)(((cmd>>2)&0xc)|(cmd>>30));
+  pvid->type = (u8)(((cmd >> 2) & 0xc) | (cmd >> 30));
+  if (pvid->type == 1) // vram
+    pvid->type |= pvid->reg[1] & 0x80; // 128k
 
   // Get address 0x3fff0003
-  addr =(cmd>>16)&0x3fff;
-  addr|=(cmd<<14)&0xc000;
-  pvid->addr=(unsigned short)addr;
+  addr  = (cmd >> 16) & 0x3fff;
+  addr |= (cmd << 14) & 0xc000;
+  pvid->addr = (u16)addr;
+  pvid->addr_u = (u8)((cmd >> 2) & 1);
 }
 
 static void DrawSync(int blank_on)
@@ -336,8 +361,9 @@ PICO_INTERNAL_ASM void PicoVideoWrite(unsigned int a,unsigned short d)
   //  elprintf(EL_STATUS, "PicoVideoWrite [%06x] %04x", a, d);
   a&=0x1c;
 
-  if (a==0x00) // Data port 0 or 2
+  switch (a)
   {
+  case 0x00: // Data port 0 or 2
     // try avoiding the sync..
     if (Pico.m.scanline < 224 && (pvid->reg[1]&0x40) &&
         !(!pvid->pending &&
@@ -367,11 +393,9 @@ PICO_INTERNAL_ASM void PicoVideoWrite(unsigned int a,unsigned short d)
     if ((pvid->command&0x80) && (pvid->reg[1]&0x10) && (pvid->reg[0x17]>>6)==2)
       DmaFill(d);
 
-    return;
-  }
+    break;
 
-  if (a==0x04) // Control (command) port 4 or 6
-  {
+  case 0x04: // Control (command) port 4 or 6
     if (pvid->pending)
     {
       // Low word of command:
@@ -448,6 +472,35 @@ update_irq:
         pvid->pending=1;
       }
     }
+    break;
+
+  // case 0x08: // 08 0a - HV counter - lock up
+  // case 0x0c: // 0c 0e - HV counter - lock up
+  // case 0x10: // 10 12 - PSG - handled by caller
+  // case 0x14: // 14 16 - PSG - handled by caller
+  // case 0x18: // 18 1a - no effect?
+  case 0x1c: // 1c 1e - debug
+    pvid->debug = d;
+    pvid->debug_p = 0;
+    if (d & (1 << 6)) {
+      pvid->debug_p |= PVD_KILL_A | PVD_KILL_B;
+      pvid->debug_p |= PVD_KILL_S_LO | PVD_KILL_S_HI;
+    }
+    switch ((d >> 7) & 3) {
+      case 1:
+        pvid->debug_p &= ~(PVD_KILL_S_LO | PVD_KILL_S_HI);
+        pvid->debug_p |= PVD_FORCE_S;
+        break;
+      case 2:
+        pvid->debug_p &= ~PVD_KILL_A;
+        pvid->debug_p |= PVD_FORCE_A;
+        break;
+      case 3:
+        pvid->debug_p &= ~PVD_KILL_B;
+        pvid->debug_p |= PVD_FORCE_B;
+        break;
+    }
+    break;
   }
 }