X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?p=fceu.git;a=blobdiff_plain;f=mappers%2F211.c;fp=mappers%2F211.c;h=5e6c5b27cf2451d3e5e88c5e4b4a5cc318c95f7e;hp=0000000000000000000000000000000000000000;hb=d97315ac0bca825d2d50a44453bc5652946e2c67;hpb=890e37ba2b8ea1c7593dc05926d7431e3bd00bfb

diff --git a/mappers/211.c b/mappers/211.c
new file mode 100644
index 0000000..5e6c5b2
--- /dev/null
+++ b/mappers/211.c
@@ -0,0 +1,146 @@
+#include "mapinc.h"
+
+static uint8 mul[2];
+static uint8 regie;
+#define tkcom1 mapbyte1[1]
+#define tkcom2 mapbyte1[2]
+#define tkcom3 mapbyte1[3]
+
+#define prgb        mapbyte2
+#define chr     mapbyte3
+
+static uint16 names[4];
+static uint8  tekker;
+
+static DECLFR(tekread)
+{
+// FCEU_printf("READ READ READ: $%04x, $%04x, $%04x\n",A,X.PC,tekker);
+ switch(A)
+ {
+  case 0x5000:return(tekker);
+  case 0x5800:return(mul[0]*mul[1]);
+  case 0x5801:return((mul[0]*mul[1])>>8);
+  case 0x5803:return(regie);
+  default:break;
+ }
+ return(X.DB);
+}
+
+static void mira(void)
+{
+  int x;
+  if(tkcom1&0x40)        // Name tables are ROM-only
+  {
+   for(x=0;x<4;x++)
+    setntamem(CHRptr[0]+(((names[x])&CHRmask1[0])<<10), 0, x);
+  }
+  else                        // Name tables can be RAM or ROM.
+  {
+  for(x=0;x<4;x++)
+  {
+   if(((tkcom3&0x80)==(names[x]&0x80)))        // RAM selected.
+    setntamem(NTARAM + ((names[x]&0x1)<<10),1,x);
+   else
+    setntamem(CHRptr[0]+(((names[x])&CHRmask1[0])<<10), 0, x);
+  }
+  }
+}
+
+static void tekprom(void)
+{
+ switch(tkcom1&3)
+  {
+   case 1:              // 16 KB
+          ROM_BANK16(0x8000,prgb[0]);
+          ROM_BANK16(0xC000,prgb[2]);
+          break;
+
+   case 2:              //2 = 8 KB ??
+          ROM_BANK8(0x8000,prgb[0]);
+          ROM_BANK8(0xa000,prgb[1]);
+          ROM_BANK8(0xc000,prgb[2]);
+          ROM_BANK8(0xe000,~0);
+               break;
+  }
+}
+
+static void tekvrom(void)
+{
+ int x;
+ switch(tkcom1&0x18)
+  {
+   case 0x00:      // 8KB
+           setchr8(chr[0]);
+               break;
+   case 0x08:      // 4KB
+          for(x=0;x<8;x+=4)
+           setchr4(x<<10,chr[x]);
+              break;
+   case 0x10:      // 2KB
+              for(x=0;x<8;x+=2)
+           setchr2(x<<10,chr[x]);
+              break;
+   case 0x18:      // 1KB
+              for(x=0;x<8;x++)
+               setchr1(x<<10,chr[x]);
+              break;
+ }
+}
+
+static DECLFW(Mapper211_write)
+{
+ if(A==0x5800) mul[0]=V;
+ else if(A==0x5801) mul[1]=V;
+ else if(A==0x5803) regie=V;
+
+ A&=0xF007;
+ if(A>=0x8000 && A<=0x8003)
+ {
+  prgb[A&3]=V;
+  tekprom();
+ }
+ else if(A>=0x9000 && A<=0x9007)
+ {
+  chr[A&7]=V;
+  tekvrom();
+ }
+ else if(A>=0xb000 && A<=0xb007)
+ {
+   names[A&3]=V&3;
+   mira();
+ }
+ else switch(A)
+ {
+   case 0xc002:IRQa=0;X6502_IRQEnd(FCEU_IQEXT);break;
+   case 0xc003:
+   case 0xc004:if(!IRQa) {IRQa=1;IRQCount=IRQLatch;} break;
+   case 0xc005:IRQCount=IRQLatch=V;
+               X6502_IRQEnd(FCEU_IQEXT);break;
+   case 0xd000: tkcom1=V; mira(); break;
+   case 0xd001: tkcom3=V; mira(); break;
+ }
+}
+
+static void Mapper211_hb(void)
+{
+ if(IRQCount) IRQCount--;
+ if(!IRQCount)
+ {
+  if(IRQa) X6502_IRQBegin(FCEU_IQEXT);
+  IRQa=0;
+ }
+}
+static void togglie()
+{
+  tekker^=0xFF;
+}
+
+void Mapper211_init(void)
+{
+  tekker=0xFF;
+  MapperReset=togglie;
+  SetWriteHandler(0x5000,0xffff,Mapper211_write);
+  SetReadHandler(0x5000,0x5fff,tekread);
+  GameHBIRQHook=Mapper211_hb;
+}
+