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

[fceu.git] / mappers / 27.c

diff --git a/mappers/27.c b/mappers/27.c
new file mode 100644 (file)
index 0000000..9dbe5cf
--- /dev/null
+++ b/mappers/27.c
@@ -0,0 +1,74 @@
+#include "mapinc.h"\r
+\r
+static uint32 regchr[9];\r
+\r
+static DECLFW(Mapper27_write)\r
+{\r
+ A&=0xF00F;\r
+ int regnum;\r
+ if((A>=0xB000) && (A<=0xE003)) {\r
+    regnum=((((A>>12)+1)&0x03)<<1)|((A&0x02)>>1);\r
+    if(A&1)\r
+       regchr[regnum]=(regchr[regnum]&0x0F)|(V<<4);\r
+    else\r
+       regchr[regnum]=(regchr[regnum]&0xFF0)|(V&0xF);\r
+    VROM_BANK1(regnum<<10,regchr[regnum]);\r
+ }\r
+ switch(A)\r
+ {\r
+  case 0x8000: if(regchr[8]&2)\r
+                  ROM_BANK8(0xc000,V);\r
+               else\r
+                  ROM_BANK8(0x8000,V);\r
+               break;\r
+  case 0xA000: ROM_BANK8(0xa000,V); break;\r
+  case 0x9000:\r
+               switch(V&3){\r
+                  case 0:setmirror(MI_V);break;\r
+                  case 1:setmirror(MI_H);break;\r
+                  case 2:setmirror(MI_0);break;\r
+                  case 3:setmirror(MI_1);break;\r
+               }\r
+  case 0x9002: regchr[8]=V; break;\r
+  case 0xF000: //X6502_IRQEnd(FCEU_IQEXT);\r
+               IRQLatch=(IRQLatch&0xF0)|(V&0x0F);\r
+                           break;\r
+  case 0xF001: //X6502_IRQEnd(FCEU_IQEXT);\r
+               IRQLatch=(IRQLatch&0x0F)|((V&0xF)<<4);\r
+                           break;\r
+  case 0xF003: IRQa=((IRQa&0x1)<<1)|(IRQa&0x1);\r
+                           X6502_IRQEnd(FCEU_IQEXT);\r
+               break;\r
+  case 0xF002: IRQa=V&3;\r
+                           if(IRQa&0x02) IRQCount=IRQLatch;\r
+                           X6502_IRQEnd(FCEU_IQEXT);\r
+                           break;\r
+ }\r
+// if((A&0xF000)==0xF000) FCEU_printf("$%04x:$%02x, %d\n",A,V, scanline);\r
+}\r
+\r
+static void Mapper27_hb(void)\r
+{\r
+//   FCEU_printf("%02x-%d,%d,%d\n",scanline,IRQa,IRQCount,IRQLatch);\r
+        if(IRQa&0x2){\r
+           if(IRQCount==0xFF){\r
+             X6502_IRQBegin(FCEU_IQEXT);\r
+              IRQCount=IRQLatch+1;\r
+         } else {\r
+           IRQCount++;\r
+           }\r
+        }\r
+}\r
+\r
+void Mapper27_init(void)\r
+{\r
+  int i;\r
+  for (i=0; i<9; i++) {\r
+    regchr[i]=0;\r
+  }\r
+  IRQa=0;\r
+  IRQCount=IRQLatch=0;\r
+  SetWriteHandler(0x8000,0xffff,Mapper27_write);\r
+  GameHBIRQHook=Mapper27_hb;\r
+}\r
+\r