boards/pec-586.c

   1 /* FCE Ultra - NES/Famicom Emulator\r
   2  *\r
   3  * Copyright notice for this file:\r
   4  *  Copyright (C) 2009 CaH4e3\r
   5  *\r
   6  * This program is free software; you can redistribute it and/or modify\r
   7  * it under the terms of the GNU General Public License as published by\r
   8  * the Free Software Foundation; either version 2 of the License, or\r
   9  * (at your option) any later version.\r
  10  *\r
  11  * This program is distributed in the hope that it will be useful,\r
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
  14  * GNU General Public License for more details.\r
  15  *\r
  16  * You should have received a copy of the GNU General Public License\r
  17  * along with this program; if not, write to the Free Software\r
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA\r
  19  */\r
  20 \r
  21 #include "mapinc.h"\r
  22 \r
  23 static uint8 reg[7];\r
  24 static uint8 *WRAM=NULL;\r
  25 static uint32 WRAMSIZE;\r
  26 \r
  27 static SFORMAT StateRegs[]=\r
  28 {\r
  29   {reg, 2, "REG"},\r
  30   {0}\r
  31 };\r
  32 \r
  33 static uint8 bs_tbl[128] = {\r
  34   0x03, 0x13, 0x23, 0x33, 0x03, 0x13, 0x23, 0x33, 0x03, 0x13, 0x23, 0x33, 0x03, 0x13, 0x23, 0x33,\r
  35   0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67,\r
  36   0x03, 0x13, 0x23, 0x33, 0x03, 0x13, 0x23, 0x33, 0x03, 0x13, 0x23, 0x33, 0x03, 0x13, 0x23, 0x33,\r
  37   0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67,\r
  38   0x02, 0x12, 0x22, 0x32, 0x02, 0x12, 0x22, 0x32, 0x02, 0x12, 0x22, 0x32, 0x02, 0x12, 0x22, 0x32,\r
  39   0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67,\r
  40   0x02, 0x12, 0x22, 0x32, 0x02, 0x12, 0x22, 0x32, 0x02, 0x12, 0x22, 0x32, 0x00, 0x10, 0x20, 0x30,\r
  41   0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67,\r
  42 };\r
  43 \r
  44 static uint8 br_tbl[16] = {\r
  45   0x00, 0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, \r
  46 };\r
  47 \r
  48 static void Sync(void)\r
  49 {\r
  50 //  setchr4(0x0000,(reg[0]&0x80) >> 7);\r
  51 //  setchr4(0x1000,(reg[0]&0x80) >> 7);\r
  52   setchr8(0);\r
  53   setprg8r(0x10,0x6000,0);\r
  54   setprg16(0x8000,bs_tbl[reg[0]&0x7f]>>4);\r
  55   setprg16(0xc000,bs_tbl[reg[0]&0x7f]&0xf);\r
  56   setmirror(MI_V);\r
  57 }\r
  58 \r
  59 static DECLFW(UNLPEC586Write)\r
  60 {\r
  61   reg[(A&0x700)>>8]=V;\r
  62   FCEU_printf("bs %04x %02x\n",A,V);\r
  63   Sync();\r
  64 }\r
  65 \r
  66 static DECLFR(UNLPEC586Read)\r
  67 {\r
  68   FCEU_printf("read %04x\n",A);\r
  69   return (X.DB & 0xD8) | br_tbl[reg[4]>>4];\r
  70 }\r
  71 \r
  72 static void UNLPEC586Power(void)\r
  73 {\r
  74   reg[0]=0x0E;\r
  75   Sync();\r
  76   setchr8(0);\r
  77   SetReadHandler(0x6000,0x7FFF,CartBR);\r
  78   SetWriteHandler(0x6000,0x7FFF,CartBW);\r
  79   SetReadHandler(0x8000,0xFFFF,CartBR);\r
  80   SetWriteHandler(0x5000,0x5fff,UNLPEC586Write);\r
  81   SetReadHandler(0x5000,0x5fff,UNLPEC586Read);\r
  82 }\r
  83 \r
  84 static void UNLPEC586IRQ(void)\r
  85 {\r
  86 //  if(reg[0]&0x80)\r
  87   {\r
  88     if(scanline==128) {\r
  89       setchr4(0x0000,1);\r
  90       setchr4(0x1000,0);\r
  91     }\r
  92     else {\r
  93       setchr4(0x0000,0);\r
  94       setchr4(0x1000,1);\r
  95     }\r
  96   }\r
  97 }\r
  98 \r
  99 static void UNLPEC586Close(void)\r
 100 {\r
 101   if(WRAM)\r
 102     FCEU_gfree(WRAM);\r
 103   WRAM=NULL;\r
 104 }\r
 105 \r
 106 static void StateRestore(int version)\r
 107 {\r
 108   Sync();\r
 109 }\r
 110 \r
 111 void UNLPEC586Init(CartInfo *info)\r
 112 {\r
 113   info->Power=UNLPEC586Power;\r
 114   info->Close=UNLPEC586Close;\r
 115   GameHBIRQHook=UNLPEC586IRQ;\r
 116   GameStateRestore=StateRestore;\r
 117 \r
 118   WRAMSIZE=8192;\r
 119   WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);\r
 120   SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);\r
 121   AddExState(WRAM, WRAMSIZE, 0, "WRAM");\r
 122 \r
 123   AddExState(&StateRegs, ~0, 0, 0);\r
 124 }\r