X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?p=fceu.git;a=blobdiff_plain;f=mappers%2F83.c;h=ca26388338459ef608bbd5f4dbee73ef841dcb95;hp=5cc7d037f60153dc04c4d86d552fc4730b33f551;hb=386f5371eb984fb9c2860c83e740890a75cd45c1;hpb=c0bf6f9f02a2b6afb961a7e9195e2168d7e9cecf diff --git a/mappers/83.c b/mappers/83.c index 5cc7d03..ca26388 100644 --- a/mappers/83.c +++ b/mappers/83.c @@ -1,7 +1,7 @@ /* FCE Ultra - NES/Famicom Emulator * * Copyright notice for this file: - * Copyright (C) 2002 Ben Parnell + * Copyright (C) 2002 Xodnizel * * 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 @@ -15,19 +15,26 @@ * * 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 + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "mapinc.h" -void FP_FASTAPASS(1) m83IRQHook(int a) +static uint8 is2kbank, isnot2kbank, dipreg; + +/*void Mapper83_init(void) +{ + +} +*/ +static void m83IRQHook(int a) { if(IRQa) { IRQCount-=a; if(IRQCount<0) { - TriggerIRQ(); + X6502_IRQBegin(FCEU_IQEXT); IRQa=0; IRQCount=0xFFFF; } @@ -44,18 +51,32 @@ static DECLFR(rdlow) return mapbyte4[A&3]; } +static DECLFR(rd5000) +{ + return dipreg; +} + static void m83prg(void) { - ROM_BANK16(0x8000,mapbyte1[0]&0x3F); + ROM_BANK16(0x8000,(mapbyte1[0]&0x3F)); ROM_BANK16(0xC000,(mapbyte1[0]&0x30)|0xF); - X6502_Rebase(); } static void m83chr(void) { - int x; - for(x=0;x<8;x++) - VROM_BANK1(x*0x400,mapbyte2[x]|((mapbyte1[0]&0x30)<<4)); + if(is2kbank&&!isnot2kbank) + { + VROM_BANK2(0x0000,mapbyte2[0]); + VROM_BANK2(0x0800,mapbyte2[1]); + VROM_BANK2(0x1000,mapbyte2[6]); + VROM_BANK2(0x1800,mapbyte2[7]); + } + else + { + int x; + for(x=0;x<8;x++) + VROM_BANK1(x*0x400,mapbyte2[x]|((mapbyte1[0]&0x30)<<4)); + } } static DECLFW(Mapper83_write) @@ -63,7 +84,7 @@ static DECLFW(Mapper83_write) //printf("$%04x:$%02x\n",A,V); switch(A) { - case 0x8000: + case 0x8000: is2kbank = 1; case 0xB000: case 0xB0FF: case 0xB1FF: @@ -74,6 +95,7 @@ static DECLFW(Mapper83_write) } break; case 0x8100: + mapbyte3[0]=V&0x80; switch(V&0x3) { case 0x00:MIRROR_SET2(1);break; @@ -82,33 +104,44 @@ static DECLFW(Mapper83_write) case 0x03:onemir(1);break; } break; - case 0x8200:IRQCount&=0xFF00;IRQCount|=V;break; - case 0x8201:IRQa=1;IRQCount&=0xFF;IRQCount|=V<<8;break; - //case 0x8300:ROM_BANK8(0x8000,V);break; - //case 0x8301:ROM_BANK8(0xA000,V);break; - //case 0x8302:ROM_BANK8(0xC000,V);break; + case 0x8200:IRQCount&=0xFF00;IRQCount|=V;X6502_IRQEnd(FCEU_IQEXT);break; + case 0x8201:IRQa=mapbyte3[0];IRQCount&=0xFF;IRQCount|=V<<8;break; + case 0x8300:ROM_BANK8(0x8000,V);break; + case 0x8301:ROM_BANK8(0xA000,V);break; + case 0x8302:ROM_BANK8(0xC000,V);break; case 0x8310:mapbyte2[0]=V;m83chr();break; case 0x8311:mapbyte2[1]=V;m83chr();break; - case 0x8312:mapbyte2[2]=V;m83chr();break; - case 0x8313:mapbyte2[3]=V;m83chr();break; - case 0x8314:mapbyte2[4]=V;m83chr();break; - case 0x8315:mapbyte2[5]=V;m83chr();break; + case 0x8312:mapbyte2[2]=V;isnot2kbank = 1;m83chr();break; // 2 mappers in one :) + case 0x8313:mapbyte2[3]=V;isnot2kbank = 1;m83chr();break; + case 0x8314:mapbyte2[4]=V;isnot2kbank = 1;m83chr();break; + case 0x8315:mapbyte2[5]=V;isnot2kbank = 1;m83chr();break; case 0x8316:mapbyte2[6]=V;m83chr();break; case 0x8317:mapbyte2[7]=V;m83chr();break; + case 0x8318:mapbyte1[1]=V;m83prg();break; } // printf("$%04x:$%02x, $%04x\n",A,V,X.PC.W); + +} +static void m83Reset(void) +{ + dipreg^=1; } void Mapper83_init(void) { - + is2kbank = 0; + isnot2kbank = 0; + dipreg = 0; ROM_BANK8(0xc000,0x1e); ROM_BANK8(0xe000,0x1f); MapIRQHook=m83IRQHook; + MapperReset=m83Reset; + SetReadHandler(0x5000,0x5000,rd5000); // title scren dip switch SetReadHandler(0x5100,0x5103,rdlow); SetWriteHandler(0x5100,0x5103,wrlow); SetWriteHandler(0x8000,0xffff,Mapper83_write); + mapbyte1[1]=0xF; }