--- /dev/null
+/* FCE Ultra - NES/Famicom Emulator\r
+ *\r
+ * Copyright notice for this file:\r
+ * Copyright (C) 2002 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r
+ */\r
+\r
+#include "mapinc.h"\r
+\r
+static uint8 prg_reg;\r
+static uint8 chr_reg;\r
+\r
+static uint8 sim0reg, sim0bit, sim0byte, sim0parity, sim0bcnt;\r
+static uint16 sim0data;\r
+static uint8 sim0array[128] =\r
+{\r
+ 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10,\r
+ 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10,\r
+ 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10,\r
+ 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10,\r
+ 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10,\r
+ 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10,\r
+ 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10,\r
+ 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0xAA,\r
+};\r
+\r
+static SFORMAT StateRegs[]=\r
+{\r
+ {&prg_reg, 1, "PREG"},\r
+ {&chr_reg, 1, "CREG"},\r
+ {0}\r
+};\r
+\r
+static void Sync(void)\r
+{\r
+ setprg32(0x8000, prg_reg);\r
+ setchr8(chr_reg);\r
+}\r
+\r
+static void StateRestore(int version)\r
+{\r
+ Sync();\r
+}\r
+\r
+static DECLFW(M216WriteHi)\r
+{\r
+// FCEU_printf("%04x:%04x\n",A,V);\r
+ prg_reg=A&1;\r
+ chr_reg=(A&0x0E)>>1;\r
+ Sync();\r
+}\r
+\r
+static DECLFW(M216Write5000)\r
+{\r
+// FCEU_printf("WRITE: %04x:%04x\n",A,V);\r
+ sim0reg=V;\r
+ if(!sim0reg)\r
+ {\r
+ sim0bit=sim0byte=sim0parity=0;\r
+ sim0data=sim0array[0];\r
+ sim0bcnt=0x80;\r
+ }\r
+ else if(sim0reg&0x20)\r
+ {\r
+ sim0bcnt=0x20;\r
+ }\r
+}\r
+\r
+static DECLFR(M216Read5000)\r
+{\r
+ if(sim0reg&0x60)\r
+ {\r
+ sim0reg=(sim0reg^(sim0reg<<1))&0x40;\r
+ return sim0reg;\r
+ }\r
+ else\r
+ {\r
+ uint8 sim0out=0;\r
+ if(sim0bit<8)\r
+ {\r
+// sim0data=((sim0array[sim0byte]<<(sim0bit))&0x80)>>1;\r
+ sim0out=(sim0data&1)<<6;\r
+ sim0data>>=1;\r
+ sim0bit++;\r
+ sim0parity+=sim0data;\r
+ }\r
+ else if(sim0bit==8)\r
+ {\r
+ sim0bit++;\r
+ sim0out=sim0parity&1;\r
+ }\r
+ else if(sim0bit==9)\r
+ {\r
+ if(sim0byte==sim0bcnt)\r
+ sim0out=0x60;\r
+ else\r
+ {\r
+ sim0bit=0;\r
+ sim0byte++;\r
+ sim0data=sim0array[sim0byte];\r
+ sim0out=0;\r
+ }\r
+ }\r
+// FCEU_printf("READ: %04x (%04x-%02x,%04x)\n",A,X.PC,sim0out,sim0byte);\r
+ return sim0out;\r
+ }\r
+}\r
+\r
+static void Power(void)\r
+{\r
+ prg_reg = 0;\r
+ chr_reg = 0;\r
+ Sync();\r
+ SetReadHandler(0x8000,0xFFFF,CartBR);\r
+ SetWriteHandler(0x8000,0xFFFF,M216WriteHi);\r
+ SetWriteHandler(0x5000,0x5000,M216Write5000);\r
+ SetReadHandler(0x5000,0x5000,M216Read5000);\r
+}\r
+\r
+\r
+void Mapper216_Init(CartInfo *info)\r
+{\r
+ info->Power=Power;\r
+ GameStateRestore=StateRestore;\r
+ AddExState(&StateRegs, ~0, 0, 0);\r
+}\r