X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?p=fceu.git;a=blobdiff_plain;f=mappers%2F255.c;fp=mappers%2F255.c;h=ede7af31997185171f4e488e0a88923e061c8945;hp=0000000000000000000000000000000000000000;hb=d97315ac0bca825d2d50a44453bc5652946e2c67;hpb=890e37ba2b8ea1c7593dc05926d7431e3bd00bfb

diff --git a/mappers/255.c b/mappers/255.c
new file mode 100644
index 0000000..ede7af3
--- /dev/null
+++ b/mappers/255.c
@@ -0,0 +1,67 @@
+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  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
+ * 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"
+
+
+
+static DECLFW(Mapper255_write)
+{
+ uint32 pbank=(A>>7)&0x1F;
+ uint32 cbank=A&0x3F;
+ uint32 rbank=(A>>14)&1;
+
+// printf("$%04x:$%02x\n",A,V);
+// printf("%2x:%2x:%2x,%2x\n",pbank,cbank,rbank,(A&0x40)>>6);
+
+ if(A&0x1000)
+ {
+  ROM_BANK16(0x8000,((pbank|(rbank<<5))<<1)|((A&0x40)>>6));
+  ROM_BANK16(0xc000,((pbank|(rbank<<5))<<1)|((A&0x40)>>6));
+ }
+ else
+ {
+  ROM_BANK32(pbank|(rbank<<5));
+ }
+ MIRROR_SET((A>>13)&1);
+ VROM_BANK8((rbank<<6)|cbank);
+}
+
+static DECLFW(Mapper255_wl)
+{
+// printf("Wr: $%04x:$%02x\n",A,V);
+ mapbyte1[A&3]=V&0xF;
+}
+
+static DECLFR(Mapper255_read)
+{
+ //printf("Rd: $%04x\n",A);
+ return(mapbyte1[A&3]); //|(X.DB&0xF0));
+}
+
+void Mapper255_init(void)
+{
+ mapbyte1[0]=mapbyte1[1]=0xF;
+ ROM_BANK32(0);
+ VROM_BANK8(0);
+ SetWriteHandler(0x5800,0x5FFF,Mapper255_wl);
+ SetWriteHandler(0x8000,0xffff,Mapper255_write);
+ SetReadHandler(0x5800,0x5FFF,Mapper255_read);
+}