X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?p=fceu.git;a=blobdiff_plain;f=boards%2F23.c;fp=boards%2F23.c;h=8760d505ff40338f0cca81d765431c395776c857;hp=0000000000000000000000000000000000000000;hb=386f5371eb984fb9c2860c83e740890a75cd45c1;hpb=eec2623f6183dd0f9494b99065a16bf90f2a1ccf

diff --git a/boards/23.c b/boards/23.c
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+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2007 CaH4e3
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include "mapinc.h"
+
+static uint8 is23;
+static uint16 IRQCount;
+static uint8 IRQLatch,IRQa;
+static uint8 prgreg[2];
+static uint8 chrreg[8];
+static uint8 regcmd, irqcmd, mirr, big_bank;
+static uint16 acount=0;
+
+static uint8 *WRAM=NULL;
+static uint32 WRAMSIZE;
+
+static SFORMAT StateRegs[]=
+{
+  {prgreg, 2, "PRGREGS"},
+  {chrreg, 8, "CHRREGS"},
+  {&regcmd, 1, "REGCMD"},
+  {&irqcmd, 1, "IRQCMD"},
+  {&mirr, 1, "MIRR"},
+  {&big_bank, 1, "BIGB"},
+  {&IRQCount, 2, "IRCN"},
+  {&IRQLatch, 1, "IRQL"},
+  {&IRQa, 1, "IRQA"},
+  {0}
+};
+
+static void Sync(void)
+{
+  if(regcmd&2)
+  {
+    setprg8(0xC000,prgreg[0]|big_bank);
+    setprg8(0x8000,((~1)&0x1F)|big_bank);
+  }
+  else
+  {
+    setprg8(0x8000,prgreg[0]|big_bank);
+    setprg8(0xC000,((~1)&0x1F)|big_bank);
+  }
+  setprg8(0xA000,prgreg[1]|big_bank);
+  setprg8(0xE000,((~0)&0x1F)|big_bank);
+  if(UNIFchrrama)
+    setchr8(0);
+  else
+  {
+    uint8 i;
+    for(i=0; i<8; i++)
+       setchr1(i<<10, chrreg[i]);
+  }
+  switch(mirr&0x3)
+  {
+    case 0: setmirror(MI_V); break;
+    case 1: setmirror(MI_H); break;
+    case 2: setmirror(MI_0); break;
+    case 3: setmirror(MI_1); break;
+  }
+}
+
+static DECLFW(M23Write)
+{
+//  FCEU_printf("%04x:%04x\n",A,V);
+  A|=((A>>2)&0x3)|((A>>4)&0x3)|((A>>6)&0x3); // actually there is many-in-one mapper source, some pirate or
+                                             // licensed games use various address bits for registers
+  A&=0xF003;
+  if((A>=0xB000)&&(A<=0xE003))
+  {
+    if(UNIFchrrama)
+      big_bank=(V&8)<<2;                    // my personally many-in-one feature ;) just for support pirate cart 2-in-1
+    else
+    {    
+      uint16 i=((A>>1)&1)|((A-0xB000)>>11);
+      chrreg[i]&=(0xF0)>>((A&1)<<2);
+      chrreg[i]|=(V&0xF)<<((A&1)<<2);
+    }
+    Sync();
+  }
+  else
+    switch(A&0xF003)
+    {
+      case 0x8000: 
+      case 0x8001: 
+      case 0x8002: 
+      case 0x8003: if(is23) 
+                     prgreg[0]=V&0x1F; 
+                   Sync(); 
+                   break;
+      case 0xA000: 
+      case 0xA001: 
+      case 0xA002: 
+      case 0xA003: if(is23) 
+                     prgreg[1]=V&0x1F; 
+                   else
+                   {
+                     prgreg[0]=(V<<1)&0x1F;
+                     prgreg[1]=((V<<1)&0x1F)|1;
+                   }
+                   Sync();
+                   break;
+      case 0x9000:
+      case 0x9001: if(V!=0xFF) mirr=V; Sync(); break;
+      case 0x9002: 
+      case 0x9003: regcmd=V; Sync(); break;
+      case 0xF000: X6502_IRQEnd(FCEU_IQEXT); IRQLatch&=0xF0; IRQLatch|=V&0xF; break;
+      case 0xF001: X6502_IRQEnd(FCEU_IQEXT); IRQLatch&=0x0F; IRQLatch|=V<<4; break;
+      case 0xF002: X6502_IRQEnd(FCEU_IQEXT); acount=0; IRQCount=IRQLatch; IRQa=V&2; irqcmd=V&1; break;
+      case 0xF003: X6502_IRQEnd(FCEU_IQEXT); IRQa=irqcmd; break;
+    }
+}
+
+static void M23Power(void)
+{
+  big_bank=0x20;  
+  Sync();
+  setprg8r(0x10,0x6000,0);              // another many-in-one code, WRAM actually contain only WaiWaiWorld game
+  SetReadHandler(0x6000,0x7FFF,CartBR);
+  SetWriteHandler(0x6000,0x7FFF,CartBW);
+  SetReadHandler(0x8000,0xFFFF,CartBR);
+  SetWriteHandler(0x8000,0xFFFF,M23Write);
+}
+
+static void M23Reset(void)
+{
+}
+
+void M23IRQHook(int a)
+{
+  #define LCYCS 341
+  if(IRQa)
+  {
+    acount+=a*3;
+    if(acount>=LCYCS)
+    {
+      while(acount>=LCYCS)
+      {
+        acount-=LCYCS;
+        IRQCount++;
+        if(IRQCount&0x100) 
+        {
+          X6502_IRQBegin(FCEU_IQEXT);
+          IRQCount=IRQLatch;
+        }
+      }
+    }
+  }
+}
+
+static void StateRestore(int version)
+{
+  Sync();
+}
+
+static void M23Close(void)
+{
+  if(WRAM)
+    FCEU_gfree(WRAM);
+}
+
+void Mapper23_Init(CartInfo *info)
+{
+  is23=1;
+  info->Power=M23Power;
+  info->Close=M23Close;
+  MapIRQHook=M23IRQHook;
+  GameStateRestore=StateRestore;
+
+  WRAMSIZE=8192;
+  WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);
+  SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);
+  AddExState(WRAM, WRAMSIZE, 0, "WRAM");
+
+  AddExState(&StateRegs, ~0, 0, 0);
+}
+
+void UNLT230_Init(CartInfo *info)
+{
+  is23=0;
+  info->Power=M23Power;
+  info->Close=M23Close;
+  MapIRQHook=M23IRQHook;
+  GameStateRestore=StateRestore;
+
+  WRAMSIZE=8192;
+  WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);
+  SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);
+  AddExState(WRAM, WRAMSIZE, 0, "WRAM");
+
+  AddExState(&StateRegs, ~0, 0, 0);
+}