merge mapper code from FCEUX

[fceu.git] / boards / 3d-block.c

diff --git a/boards/3d-block.c b/boards/3d-block.c
new file mode 100644 (file)
index 0000000..24572a4
--- /dev/null
+++ b/boards/3d-block.c
@@ -0,0 +1,110 @@
+/* FCE Ultra - NES/Famicom Emulator\r
+ *\r
+ * Copyright notice for this file:\r
+ *  Copyright (C) 2007 CaH4e3\r
+ *\r
+ * This program is free software; you can redistribute it and/or modify\r
+ * it under the terms of the GNU General Public License as published by\r
+ * the Free Software Foundation; either version 2 of the License, or\r
+ * (at your option) any later version.\r
+ *\r
+ * This program is distributed in the hope that it will be useful,\r
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
+ * GNU General Public License for more details.\r
+ *\r
+ * You should have received a copy of the GNU General Public License\r
+ * along with this program; if not, write to the Free Software\r
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA\r
+ */\r
+\r
+#include "mapinc.h"\r
+\r
+static uint8 reg[4], IRQa;\r
+static int16 IRQCount, IRQPause;\r
+\r
+static int16 Count = 0x0000;\r
+\r
+static SFORMAT StateRegs[]=\r
+{\r
+  {reg, 4, "REGS"},\r
+  {&IRQa, 1, "IRQA"},\r
+  {&IRQCount, 2, "IRQC"},\r
+  {0}\r
+};\r
+\r
+static void Sync(void)\r
+{\r
+  setprg32(0x8000,0);\r
+  setchr8(0);\r
+}\r
+\r
+//#define Count 0x1800\r
+#define Pause 0x010\r
+\r
+static DECLFW(UNL3DBlockWrite)\r
+{\r
+  switch(A)\r
+  {\r
+//4800 32\r
+//4900 37\r
+//4a00 01\r
+//4e00 18\r
+    case 0x4800: reg[0]=V; break;\r
+    case 0x4900: reg[1]=V; break;\r
+    case 0x4a00: reg[2]=V; break;\r
+    case 0x4e00: reg[3]=V; IRQCount=Count; IRQPause=Pause; IRQa=1; X6502_IRQEnd(FCEU_IQEXT); break;\r
+  } \r
+}\r
+\r
+static void UNL3DBlockPower(void)\r
+{\r
+  Sync();\r
+  SetReadHandler(0x8000,0xFFFF,CartBR);\r
+  SetWriteHandler(0x4800,0x4E00,UNL3DBlockWrite);\r
+}\r
+\r
+static void UNL3DBlockReset(void)\r
+{\r
+  Count+=0x10;\r
+  FCEU_printf("Count=%04x\n",Count);\r
+}\r
+\r
+static void UNL3DBlockIRQHook(int a)\r
+{\r
+  if(IRQa)\r
+  {\r
+    if(IRQCount>0)\r
+    {\r
+      IRQCount-=a;\r
+    }\r
+    else\r
+    {\r
+      if(IRQPause>0)\r
+      {\r
+        IRQPause-=a;\r
+        X6502_IRQBegin(FCEU_IQEXT);\r
+      }\r
+      else\r
+      {\r
+        IRQCount=Count; \r
+        IRQPause=Pause;\r
+        X6502_IRQEnd(FCEU_IQEXT);\r
+      }\r
+    }\r
+  }\r
+}\r
+\r
+static void StateRestore(int version)\r
+{\r
+  Sync();\r
+}\r
+\r
+void UNL3DBlock_Init(CartInfo *info)\r
+{\r
+  info->Power=UNL3DBlockPower;\r
+  info->Reset=UNL3DBlockReset;\r
+  MapIRQHook=UNL3DBlockIRQHook;\r
+  GameStateRestore=StateRestore;\r
+  AddExState(&StateRegs, ~0, 0, 0);\r
+}\r