updated bords/mappers/stuff to 0.98.15, lots of them got broken, asmcore support...

[fceu.git] / mappers / 91.c

diff --git a/mappers/91.c b/mappers/91.c
new file mode 100644 (file)
index 0000000..8858103
--- /dev/null
+++ b/mappers/91.c
@@ -0,0 +1,59 @@
+/* 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(Mapper91_write)
+{
+//if(A>=0x7001)
+//printf("$%04x:$%02x, %d\n",A,V,scanline);
+ A&=0xF007;
+
+ if(A>=0x6000 && A<=0x6003) VROM_BANK2((A&3)*2048,V);
+ else switch(A&0xF003)
+ {
+  case 0x7000:
+  case 0x7001:ROM_BANK8(0x8000+(A&1)*8192,V);break;
+  case 0x7002:IRQa=IRQCount=0;X6502_IRQEnd(FCEU_IQEXT);break;
+  case 0x7003:IRQa=1;X6502_IRQEnd(FCEU_IQEXT);break;
+//  default: printf("Iyee: $%04x:$%02x\n",A,V);break;
+ }
+ //if(A>=0x7000)
+ // printf("$%04x:$%02x, %d\n",A,V,scanline);
+}
+
+static void Mapper91_hb(void)
+{
+ if(IRQCount<8 && IRQa)
+ {
+  IRQCount++;
+  if(IRQCount>=8)
+  {
+    X6502_IRQBegin(FCEU_IQEXT);   
+  } 
+ }
+}
+
+void Mapper91_init(void)
+{
+  SetWriteHandler(0x4020,0xFFFF,Mapper91_write);
+  GameHBIRQHook=Mapper91_hb;
+} 
+