mirror of
https://github.com/dborth/fceugx.git
synced 2024-11-01 15:05:05 +01:00
291 lines
7.2 KiB
C++
291 lines
7.2 KiB
C++
/* FCE Ultra - NES/Famicom Emulator
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*
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* Copyright notice for this file:
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* Copyright (C) 2006 CaH4e3
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "mapinc.h"
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#include "mmc3.h"
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#include "../ines.h"
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static bool is_BMCFK23CA;
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static uint8 unromchr;
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static uint32 dipswitch;
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static uint8 *CHRRAM=NULL;
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static uint32 CHRRAMSize;
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static void BMCFK23CCW(uint32 A, uint8 V)
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{
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if(EXPREGS[0]&0x40)
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setchr8(EXPREGS[2]|unromchr);
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else if(EXPREGS[0]&0x20) {
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setchr1r(0x10, A, V);
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}
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else
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{
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uint16 base=(EXPREGS[2]&0x7F)<<3;
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if(EXPREGS[3]&2)
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{
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int cbase=(MMC3_cmd&0x80)<<5;
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setchr1(A,V|base);
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setchr1(0x0000^cbase,DRegBuf[0]|base);
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setchr1(0x0400^cbase,EXPREGS[6]|base);
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setchr1(0x0800^cbase,DRegBuf[1]|base);
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setchr1(0x0c00^cbase,EXPREGS[7]|base);
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}
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else
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setchr1(A,V|base);
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}
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}
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//some games are wired differently, and this will need to be changed.
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//all the WXN games require prg_bonus = 1, and cah4e3's multicarts require prg_bonus = 0
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//we'll populate this from a game database
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static int prg_bonus;
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static int prg_mask;
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//prg_bonus = 0
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//4-in-1 (FK23C8021)[p1][!].nes
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//4-in-1 (FK23C8033)[p1][!].nes
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//4-in-1 (FK23C8043)[p1][!].nes
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//4-in-1 (FK23Cxxxx, S-0210A PCB)[p1][!].nes
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//prg_bonus = 1
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//[m176]大富翁2-上海大亨.wxn.nes
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//[m176]宠物翡翠.fix.nes
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//[m176]格兰帝亚.wxn.nes
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//[m176]梦幻之星.wxn.nes
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//[m176]水浒神兽.fix.nes
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//[m176]西楚霸王.fix.nes
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//[m176]超级大富翁.wxn.nes
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//[m176]雄霸天下.wxn.nes
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//works as-is under virtuanes m176
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//[m176]三侠五义.wxn.nes
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//[m176]口袋金.fix.nes
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//[m176]爆笑三国.fix.nes
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//needs other tweaks
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//[m176]三国忠烈传.wxn.nes
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//[m176]破釜沉舟.fix.nes
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//PRG wrapper
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static void BMCFK23CPW(uint32 A, uint8 V)
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{
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uint32 bank = (EXPREGS[1] & 0x1F);
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uint32 hiblock = ((EXPREGS[0] & 8) << 4)|((EXPREGS[0] & 0x80) << 1)|(UNIFchrrama?((EXPREGS[2] & 0x40)<<3):0);
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uint32 block = (EXPREGS[1] & 0x60) | hiblock;
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uint32 extra = (EXPREGS[3] & 2);
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if((EXPREGS[0]&7)==4)
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setprg32(0x8000,EXPREGS[1]>>1);
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else if ((EXPREGS[0]&7)==3)
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{
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setprg16(0x8000,EXPREGS[1]);
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setprg16(0xC000,EXPREGS[1]);
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}
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else
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{
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if(EXPREGS[0]&3)
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{
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uint32 blocksize = (6)-(EXPREGS[0]&3);
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uint32 mask = (1<<blocksize)-1;
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V &= mask;
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//V &= 63; //? is this a good idea?
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V |= (EXPREGS[1]<<1);
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setprg8(A,V);
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}
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else
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setprg8(A,V & prg_mask);
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if(EXPREGS[3]&2)
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{
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setprg8(0xC000,EXPREGS[4]);
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setprg8(0xE000,EXPREGS[5]);
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}
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}
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setprg8r(0x10,0x6000,A001B&3);
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}
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//PRG handler ($8000-$FFFF)
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static DECLFW(BMCFK23CHiWrite)
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{
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if(EXPREGS[0]&0x40)
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{
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if(EXPREGS[0]&0x30)
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unromchr=0;
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else
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{
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unromchr=V&3;
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FixMMC3CHR(MMC3_cmd);
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}
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}
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else
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{
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if((A==0x8001)&&(EXPREGS[3]&2&&MMC3_cmd&8))
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{
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EXPREGS[4|(MMC3_cmd&3)]=V;
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FixMMC3PRG(MMC3_cmd);
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FixMMC3CHR(MMC3_cmd);
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}
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else
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if(A<0xC000) {
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if(UNIFchrrama) { // hacky... strange behaviour, must be bit scramble due to pcb layot restrictions
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// check if it not interfer with other dumps
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if((A==0x8000)&&(V==0x46))
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V=0x47;
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else if((A==0x8000)&&(V==0x47))
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V=0x46;
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}
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MMC3_CMDWrite(A,V);
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FixMMC3PRG(MMC3_cmd);
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}
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else
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MMC3_IRQWrite(A,V);
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}
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}
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//EXP handler ($5000-$5FFF)
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static DECLFW(BMCFK23CWrite)
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{
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if(A&(1<<(dipswitch+4)))
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{
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//printf("+ ");
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EXPREGS[A&3]=V;
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bool remap = false;
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//sometimes writing to reg0 causes remappings to occur. we think the 2 signifies this.
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//if not, 0x24 is a value that is known to work
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//however, the low 4 bits are known to control the mapping mode, so 0x20 is more likely to be the immediate remap flag
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remap |= ((EXPREGS[0]&0xF0)==0x20);
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//this is an actual mapping reg. i think reg0 controls what happens when reg1 is written. anyway, we have to immediately remap these
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remap |= (A&3)==1;
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//this too.
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remap |= (A&3)==2;
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if(remap)
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{
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FixMMC3PRG(MMC3_cmd);
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FixMMC3CHR(MMC3_cmd);
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}
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}
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if(is_BMCFK23CA)
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{
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if(EXPREGS[3]&2)
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EXPREGS[0] &= ~7; // hacky hacky! if someone wants extra banking, then for sure doesn't want mode 4 for it! (allow to run A version boards on normal mapper)
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}
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//printf("%04X = $%02X\n",A,V);
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//printf("%02X %02X %02X %02X\n",EXPREGS[0],EXPREGS[1],EXPREGS[2],EXPREGS[3]);
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}
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static void BMCFK23CReset(void)
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{
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//NOT NECESSARY ANYMORE
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//this little hack makes sure that we try all the dip switch settings eventually, if we reset enough
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// dipswitch++;
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// dipswitch&=7;
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//printf("BMCFK23C dipswitch set to %d\n",dipswitch);
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EXPREGS[0]=EXPREGS[1]=EXPREGS[2]=EXPREGS[3]=0;
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EXPREGS[4]=EXPREGS[5]=EXPREGS[6]=EXPREGS[7]=0xFF;
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MMC3RegReset();
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FixMMC3PRG(MMC3_cmd);
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FixMMC3CHR(MMC3_cmd);
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}
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static void BMCFK23CPower(void)
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{
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dipswitch = 0;
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GenMMC3Power();
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EXPREGS[0]=EXPREGS[1]=EXPREGS[2]=EXPREGS[3]=0;
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EXPREGS[4]=EXPREGS[5]=EXPREGS[6]=EXPREGS[7]=0xFF;
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GenMMC3Power();
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SetWriteHandler(0x5000,0x5fff,BMCFK23CWrite);
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SetWriteHandler(0x8000,0xFFFF,BMCFK23CHiWrite);
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FixMMC3PRG(MMC3_cmd);
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FixMMC3CHR(MMC3_cmd);
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}
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static void BMCFK23CAPower(void)
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{
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GenMMC3Power();
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dipswitch = 0;
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EXPREGS[0]=EXPREGS[1]=EXPREGS[2]=EXPREGS[3]=0;
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EXPREGS[4]=EXPREGS[5]=EXPREGS[6]=EXPREGS[7]=0xFF;
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SetWriteHandler(0x5000,0x5fff,BMCFK23CWrite);
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SetWriteHandler(0x8000,0xFFFF,BMCFK23CHiWrite);
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FixMMC3PRG(MMC3_cmd);
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FixMMC3CHR(MMC3_cmd);
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}
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static void BMCFK23CAClose(void)
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{
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if(CHRRAM)
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FCEU_gfree(CHRRAM);
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CHRRAM=NULL;
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}
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void BMCFK23C_Init(CartInfo *info)
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{
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is_BMCFK23CA = false;
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GenMMC3_Init(info, 512, 256, 8, 0);
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cwrap=BMCFK23CCW;
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pwrap=BMCFK23CPW;
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info->Power=BMCFK23CPower;
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info->Reset=BMCFK23CReset;
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AddExState(EXPREGS, 8, 0, "EXPR");
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AddExState(&unromchr, 1, 0, "UCHR");
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AddExState(&dipswitch, 1, 0, "DPSW");
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prg_bonus = 1;
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if(MasterRomInfoParams.find("bonus") != MasterRomInfoParams.end())
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prg_bonus = atoi(MasterRomInfoParams["bonus"].c_str());
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prg_mask = 0x7F>>(prg_bonus);
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}
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void BMCFK23CA_Init(CartInfo *info)
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{
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is_BMCFK23CA = true;
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GenMMC3_Init(info, 512, 256, 8, 0);
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cwrap=BMCFK23CCW;
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pwrap=BMCFK23CPW;
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info->Power=BMCFK23CAPower;
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info->Reset=BMCFK23CReset;
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info->Close=BMCFK23CAClose;
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CHRRAMSize=8192;
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CHRRAM=(uint8*)FCEU_gmalloc(CHRRAMSize);
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SetupCartCHRMapping(0x10, CHRRAM, CHRRAMSize, 1);
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AddExState(CHRRAM, CHRRAMSize, 0, "CRAM");
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AddExState(EXPREGS, 8, 0, "EXPR");
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AddExState(&unromchr, 1, 0, "UCHR");
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AddExState(&dipswitch, 1, 0, "DPSW");
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prg_bonus = 1;
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if(MasterRomInfoParams.find("bonus") != MasterRomInfoParams.end())
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prg_bonus = atoi(MasterRomInfoParams["bonus"].c_str());
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prg_mask = 0x7F>>(prg_bonus);
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}
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