/* FCE Ultra - NES/Famicom Emulator
*
* Copyright notice for this file:
- * Copyright (C) 1998 BERO
- * Copyright (C) 2002 Ben Parnell
+ * Copyright (C) 2003 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
#include "mapinc.h"
+static void Sync(void)
+{
+ int x;
+
+ setmirror(((mapbyte1[0]>>6)&1)^1);
+ switch(mapbyte1[1]&0x3)
+ {
+ case 0x0:
+ for(x=0;x<4;x++)
+ setprg8(0x8000+x*8192,(((mapbyte1[0]&0x7F)<<1)+x)^(mapbyte1[0]>>7));
+ break;
+ case 0x2:
+ for(x=0;x<4;x++)
+ setprg8(0x8000+x*8192,((mapbyte1[0]&0x7F)<<1)+(mapbyte1[0]>>7));
+ break;
+ case 0x1:
+ case 0x3:
+ for(x=0;x<4;x++)
+ {
+ unsigned int b;
+ b=mapbyte1[0]&0x7F;
+ if(x>=2 && !(mapbyte1[1]&0x2))
+ b=0x7F;
+ setprg8(0x8000+x*8192,(x&1)+((b<<1)^(mapbyte1[0]>>7)));
+ }
+ break;
+ }
+}
-DECLFW(Mapper15_write)
+static DECLFW(Mapper15_write)
{
-switch(A)
- {
- case 0x8000:
- if(V&0x80)
- {
- ROM_BANK8(0x8000,(V<<1)+1);
- ROM_BANK8(0xA000,(V<<1));
- ROM_BANK8(0xC000,(V<<1)+2);
- ROM_BANK8(0xE000,(V<<1)+1);
- }
- else
- {
- ROM_BANK16(0x8000,V);
- ROM_BANK16(0xC000,V+1);
- }
- MIRROR_SET((V>>6)&1);
- X6502_Rebase();
- break;
- case 0x8001:
- MIRROR_SET(0);
- ROM_BANK16(0x8000,V);
- ROM_BANK16(0xc000,~0);
- X6502_Rebase();
- break;
- case 0x8002:
- if(V&0x80)
- {
- ROM_BANK8(0x8000,((V<<1)+1));
- ROM_BANK8(0xA000,((V<<1)+1));
- ROM_BANK8(0xC000,((V<<1)+1));
- ROM_BANK8(0xE000,((V<<1)+1));
- }
- else
- {
- ROM_BANK8(0x8000,(V<<1));
- ROM_BANK8(0xA000,(V<<1));
- ROM_BANK8(0xC000,(V<<1));
- ROM_BANK8(0xE000,(V<<1));
- }
- X6502_Rebase();
- break;
- case 0x8003:
- MIRROR_SET((V>>6)&1);
- if(V&0x80)
- {
- ROM_BANK8(0xC000,(V<<1)+1);
- ROM_BANK8(0xE000,(V<<1));
- }
- else
- {
- ROM_BANK16(0xC000,V);
- }
- X6502_Rebase();
- break;
- }
+ mapbyte1[0]=V;
+ mapbyte1[1]=A&3;
+ Sync();
+}
+
+static void StateRestore(int version)
+{
+ Sync();
}
void Mapper15_init(void)
{
- ROM_BANK32(0);
- SetWriteHandler(0x8000,0xFFFF,Mapper15_write);
+ mapbyte1[0]=mapbyte1[1]=0;
+ Sync();
+ GameStateRestore=StateRestore;
+ SetWriteHandler(0x8000,0xFFFF,Mapper15_write);
}