+++ /dev/null
-/* FCE Ultra - NES/Famicom Emulator
- *
- * Copyright notice for this file:
- * Copyright (C) 1998 BERO
- * Copyright (C) 2002 Ben Parnell
- *
- * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#include "mapinc.h"
-
-#define MMC1_reg mapbyte1
-#define MMC1_buf mapbyte2[0]
-#define MMC1_sft mapbyte3[0]
-
-static int mmc1opts;
-
-
-uint8 MMC1WRAMsize; /* For use in iNES.c */
-
-static DECLFW(MBWRAM)
-{
- if(!(MMC1_reg[3]&0x10))
- Page[A>>11][A]=V; // WRAM is enabled.
-}
-
-static DECLFR(MAWRAM)
-{
- if(MMC1_reg[3]&0x10)
- return X.DB; // WRAM is disabled
- return(Page[A>>11][A]);
-}
-
-static void MMC1CHR(void)
-{
- if(mmc1opts&4)
- {
- if(MMC1_reg[0]&0x10)
- setprg8r(0x10,0x6000,(MMC1_reg[1]>>4)&1);
- else
- setprg8r(0x10,0x6000,(MMC1_reg[1]>>3)&1);
- X6502_Rebase();
- }
-
- if(MMC1_reg[0]&0x10)
- {
- setchr4(0x0000,MMC1_reg[1]);
- setchr4(0x1000,MMC1_reg[2]);
- }
- else
- setchr8(MMC1_reg[1]>>1);
-}
-
-static void MMC1PRG(void)
-{
- uint8 offs;
-
- offs=MMC1_reg[1]&0x10;
- switch(MMC1_reg[0]&0xC)
- {
- case 0xC: setprg16(0x8000,(MMC1_reg[3]+offs));
- setprg16(0xC000,0xF+offs);
- break;
- case 0x8: setprg16(0xC000,(MMC1_reg[3]+offs));
- setprg16(0x8000,offs);
- break;
- case 0x0:
- case 0x4:
- setprg16(0x8000,((MMC1_reg[3]&~1)+offs));
- setprg16(0xc000,((MMC1_reg[3]&~1)+offs+1));
- break;
- }
- X6502_Rebase();
-}
-static void MMC1MIRROR(void)
-{
- switch(MMC1_reg[0]&3)
- {
- case 2: setmirror(MI_V);break;
- case 3: setmirror(MI_H);break;
- case 0: setmirror(MI_0);break;
- case 1: setmirror(MI_1);break;
- }
-}
-
-static uint64 lreset;
-
-static DECLFW(MMC1_write)
-{
- int n=(A>>13)-4;
- //FCEU_DispMessage("%016x",timestampbase+timestamp);
- //printf("$%04x:$%02x, $%04x\n",A,V,X.PC);
- //DumpMem("out",0xe000,0xffff);
-
- /* The MMC1 is busy so ignore the write. */
- /* As of version FCE Ultra 0.81, the timestamp is only
- increased before each instruction is executed(in other words
- precision isn't that great), but this should still work to
- deal with 2 writes in a row from a single RMW instruction.
- */
- if( (timestampbase+timestamp)<(lreset+2))
- return;
- if (V&0x80)
- {
- MMC1_reg[0]|=0xC;
- MMC1_sft=MMC1_buf=0;
- MMC1PRG();
- lreset=timestampbase+timestamp;
- return;
- }
-
- MMC1_buf|=(V&1)<<(MMC1_sft++);
-
- if (MMC1_sft==5) {
- MMC1_reg[n]=MMC1_buf;
- MMC1_sft = MMC1_buf=0;
-
- switch(n){
- case 0:
- MMC1MIRROR();
- MMC1CHR();
- MMC1PRG();
- break;
- case 1:
- MMC1CHR();
- MMC1PRG();
- break;
- case 2:
- MMC1CHR();
- break;
- case 3:
- MMC1PRG();
- break;
- }
- }
-}
-
-static void MMC1_Restore(int version)
-{
- MMC1MIRROR();
- MMC1CHR();
- MMC1PRG();
-}
-
-static void MMC1CMReset(void)
-{
- int i;
-
- for(i=0;i<4;i++)
- MMC1_reg[i]=0;
- MMC1_sft = MMC1_buf =0;
- MMC1_reg[0]=0x1F;
-
- MMC1_reg[1]=0;
- MMC1_reg[2]=0; // Should this be something other than 0?
- MMC1_reg[3]=0;
-
- MMC1MIRROR();
- MMC1CHR();
- MMC1PRG();
-}
-
-void DetectMMC1WRAMSize(void)
-{
- switch(iNESGameCRC32)
- {
- default:MMC1WRAMsize=1;break;
- case 0xc6182024: /* Romance of the 3 Kingdoms */
- case 0x2225c20f: /* Genghis Khan */
- case 0x4642dda6: /* Nobunaga's Ambition */
- case 0x29449ba9: /* "" "" (J) */
- case 0x2b11e0b0: /* "" "" (J) */
- MMC1WRAMsize=2;
- break;
- }
-}
-
-void Mapper1_init(void)
-{
- lreset=0;
- mmc1opts=0;
- MMC1CMReset();
- SetWriteHandler(0x8000,0xFFFF,MMC1_write);
- MapStateRestore=MMC1_Restore;
- AddExState(&lreset, 8, 1, "LRST");
-
- if(!VROM_size)
- SetupCartCHRMapping(0, CHRRAM, 8192, 1);
-
- if(MMC1WRAMsize==2)
- mmc1opts|=4;
-
- SetupCartPRGMapping(0x10,WRAM,MMC1WRAMsize*8192,1);
- SetReadHandler(0x6000,0x7FFF,MAWRAM);
- SetWriteHandler(0x6000,0x7FFF,MBWRAM);
- setprg8r(0x10,0x6000,0);
-}
-
-static void GenMMC1Close(void)
-{
- UNIFOpenWRAM(UOW_WR,0,0);
- UNIFWriteWRAM(WRAM+((mmc1opts&4)?8192:0),8192);
- UNIFCloseWRAM();
-}
-
-
-static void GenMMC1Power(void)
-{
- lreset=0;
- if(mmc1opts&1)
- {
- FCEU_CheatAddRAM(8,0x6000,WRAM);
- if(mmc1opts&4)
- FCEU_dwmemset(WRAM,0,8192)
- else if(!(mmc1opts&2))
- FCEU_dwmemset(WRAM,0,8192);
- }
- SetWriteHandler(0x8000,0xFFFF,MMC1_write);
- SetReadHandler(0x8000,0xFFFF,CartBR);
-
- if(mmc1opts&1)
- {
- SetReadHandler(0x6000,0x7FFF,MAWRAM);
- SetWriteHandler(0x6000,0x7FFF,MBWRAM);
- setprg8r(0x10,0x6000,0);
- }
-
- MMC1CMReset();
-}
-
-static void GenMMC1Init(int prg, int chr, int wram, int battery)
-{
- mmc1opts=0;
- PRGmask16[0]&=(prg>>14)-1;
- CHRmask4[0]&=(chr>>12)-1;
- CHRmask8[0]&=(chr>>13)-1;
-
- if(wram)
- {
- mmc1opts|=1;
- if(wram>8) mmc1opts|=4;
- SetupCartPRGMapping(0x10,WRAM,wram*1024,1);
- AddExState(WRAM, wram*1024, 0, "WRAM");
- }
-
- if(battery && UNIFbattery)
- {
- mmc1opts|=2;
- BoardClose=GenMMC1Close;
-
- UNIFOpenWRAM(UOW_RD,0,0);
- UNIFReadWRAM(WRAM+((mmc1opts&4)?8192:0),8192);
- UNIFCloseWRAM();
- }
-
- if(!chr)
- {
- CHRmask4[0]=1;
- SetupCartCHRMapping(0, CHRRAM, 8192, 1);
- AddExState(CHRRAM, 8192, 0, "CHRR");
- }
- AddExState(mapbyte1, 32, 0, "MPBY");
- BoardPower=GenMMC1Power;
-
- GameStateRestore=MMC1_Restore;
- AddExState(&lreset, 8, 1, "LRST");
-}
-
-//static void GenMMC1Init(int prg, int chr, int wram, int battery)
-void SAROM_Init(void)
-{
- GenMMC1Init(128, 64, 8, 1);
-}
-
-void SBROM_Init(void)
-{
- GenMMC1Init(128, 64, 0, 0);
-}
-
-void SCROM_Init(void)
-{
- GenMMC1Init(128, 128, 0, 0);
-}
-
-void SEROM_Init(void)
-{
- GenMMC1Init(32, 64, 0, 0);
-}
-
-void SGROM_Init(void)
-{
- GenMMC1Init(256, 0, 0, 0);
-}
-
-void SKROM_Init(void)
-{
- GenMMC1Init(256, 64, 8, 1);
-}
-
-void SLROM_Init(void)
-{
- GenMMC1Init(256, 128, 0, 0);
-}
-
-void SL1ROM_Init(void)
-{
- GenMMC1Init(128, 128, 0, 0);
-}
-
-/* Begin unknown - may be wrong - perhaps they use different MMC1s from the
- similarly functioning boards?
-*/
-
-void SL2ROM_Init(void)
-{
- GenMMC1Init(256, 256, 0, 0);
-}
-
-void SFROM_Init(void)
-{
- GenMMC1Init(256, 256, 0, 0);
-}
-
-void SHROM_Init(void)
-{
- GenMMC1Init(256, 256, 0, 0);
-}
-
-/* End unknown */
-/* */
-/* */
-
-void SNROM_Init(void)
-{
- GenMMC1Init(256, 0, 8, 1);
-}
-
-void SOROM_Init(void)
-{
- GenMMC1Init(256, 0, 16, 1);
-}
-
-
notaz.gp2x.de / fceu.git / blobdiff