+++ /dev/null
-/* FCE Ultra - NES/Famicom Emulator
- *
- * Copyright notice for this file:
- * 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 cmd mapbyte1[0]
-#define mir mapbyte1[1]
-#define rmode mapbyte1[2]
-#define regsl mapbyte2
-#define regsh mapbyte3
-
-static void RAMBO1_hb(void)
-{
- rmode=0;
- if(IRQCount>=0)
- {
- IRQCount--;
- if(IRQCount<0)
- {
- if(IRQa)
- {
-// printf("IRQ: %d\n",scanline);
- rmode = 1;
- X6502_IRQBegin(FCEU_IQEXT);
- }
- }
- }
-}
-
-static void Synco(void)
-{
- int x;
-
- if(cmd&0x20)
- {
- setchr1(0x0000,regsl[0]);
- setchr1(0x0800,regsl[1]);
- setchr1(0x0400,regsh[0]);
- setchr1(0x0c00,regsh[1]);
- }
- else
- {
- setchr2(0x0000,regsl[0]>>1);
- setchr2(0x0800,regsl[1]>>1);
- }
-
- for(x=0;x<4;x++)
- setchr1(0x1000+x*0x400,regsl[2+x]);
-
- setprg8(0x8000,regsl[6]);
- setprg8(0xA000,regsl[7]);
-
- setprg8(0xC000,regsh[7]);
- X6502_Rebase();
-}
-
-
-static DECLFW(RAMBO1_write)
-{
- //if(A>=0xC000 && A<=0xFFFF) printf("$%04x:$%02x, %d, %d\n",A,V,scanline,timestamp);
- switch(A&0xF001)
- {
- case 0xa000:mir=V&1;
- setmirror(mir^1);
- break;
- case 0x8000:cmd = V;
- break;
- case 0x8001:
- if((cmd&15)<8)
- regsl[cmd&7]=V;
- else
- regsh[cmd&7]=V;
- Synco();
- break;
- case 0xc000:IRQLatch=V;
- if(rmode==1)
- {
- IRQCount=IRQLatch;
- }
- break;
- case 0xc001:rmode=1;
- IRQCount=IRQLatch;
- break;
- case 0xE000:IRQa=0;X6502_IRQEnd(FCEU_IQEXT);
- if(rmode==1)
- {IRQCount=IRQLatch;}
- break;
- case 0xE001:IRQa=1;
- if(rmode==1)
- {IRQCount=IRQLatch;}
- break;
- }
-}
-
-static void RAMBO1_Restore(int version)
-{
- if(version<74)
- {
- int x;
-
- x=mapbyte1[1]; // was MMC3_cmd
- cmd=x;
-
- regsl[0]=CHRBankList[0];
- regsl[1]=CHRBankList[2];
- regsh[0]=CHRBankList[1];
- regsh[1]=CHRBankList[3];
-
- for(x=0;x<4;x++)
- regsl[2+x]=CHRBankList[4+x];
-
- regsl[6]=PRGBankList[0];
- regsl[7]=PRGBankList[1];
- regsh[7]=PRGBankList[2];
- mir=Mirroring^1;
- }
- Synco();
- setmirror(mir^1);
-}
-
-void Mapper64_init(void)
-{
- int x;
-
- for(x=0;x<8;x++)
- regsl[x]=regsh[x]=~0;
- cmd=0;
- mir=0;
- setmirror(1);
- Synco();
- GameHBIRQHook=RAMBO1_hb;
- GameStateRestore=RAMBO1_Restore;
- SetWriteHandler(0x8000,0xffff,RAMBO1_write);
-}