more menu work, scalers, sound

[fceu.git] / boards / bonza.c

/* 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