-/* FCE Ultra - NES/Famicom Emulator
- *
- * Copyright notice for this file:
- * Copyright (C) 2002 Ben Parnell
- *
- * 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"
-//undef printf
-
-static int32 IRQCount,IRQLatch;
-static uint8 IRQa,resetmode,mbia;
-static uint8 sizer,bigbank,bigbank2;
-
-static uint8 DRegBuf[8],MMC3_cmd;
-
-static int masko8[8]={63,31,15,1,3,0,0,0};
-//static int masko1[8]={511,255,127,7,7,0,0,0};
-
-static void swsetprg8(uint32 A, uint32 V)
-{
- V&=masko8[sizer&7];
- V|=(bigbank*2);
- setprg8r((V/64)&15,A,V);
-}
-
-static void swsetchr1(uint32 A, uint32 V)
-{
- if(sizer&0x20)
- setchr1r(0x10,A,V);
- else
- {
-// V&=masko1[sizer&7];
- V|=bigbank2*8;
- setchr1r((V/512)&15,A,V);
- }
-}
-
-static void swsetchr2(uint32 A, uint32 V)
-{
- if(sizer&0x20)
- setchr2r(0x10,A,V);
- else
- {
- //V&=masko1[sizer&7]>>1;
- V|=bigbank2*4;
- setchr2r((V/256)&15,A,V);
- }
-}
-
-static void Sup24_hb(void)
-{
- if(ScreenON || SpriteON)
- {
- resetmode=0;
- if(IRQCount>=0)
- {
- IRQCount--;
- if(IRQCount<0)
- {
- if(IRQa)
- {
- resetmode = 1;
- X6502_IRQBegin(FCEU_IQEXT);
- }
- }
- }
- }
-}
-
-static DECLFW(Sup24IRQWrite)
-{
- switch(A&0xE001)
- {
- case 0xc000:IRQLatch=V;
- if(resetmode==1)
- IRQCount=IRQLatch;
- break;
- case 0xc001:resetmode=1;
- IRQCount=IRQLatch;
- break;
- case 0xE000:IRQa=0;X6502_IRQEnd(FCEU_IQEXT);
- if(resetmode==1)
- {IRQCount=IRQLatch;}
- break;
- case 0xE001:IRQa=1;
- if(resetmode==1)
- {IRQCount=IRQLatch;}
- break;
- }
-}
-
-static INLINE void FixMMC3PRG(int V)
-{
- swsetprg8(0xA000,DRegBuf[7]);
- swsetprg8(0xE000,~0);
- if(V&0x40)
- {
- swsetprg8(0xC000,DRegBuf[6]);
- swsetprg8(0x8000,~1);
- }
- else
- {
- swsetprg8(0x8000,DRegBuf[6]);
- swsetprg8(0xC000,~1);
- }
- X6502_Rebase();
-}
-
-static INLINE void FixMMC3CHR(int V)
-{
- int cbase=(V&0x80)<<5;
- swsetchr2((cbase^0x000),DRegBuf[0]>>1);
- swsetchr2((cbase^0x800),DRegBuf[1]>>1);
- swsetchr1(cbase^0x1000,DRegBuf[2]);
- swsetchr1(cbase^0x1400,DRegBuf[3]);
- swsetchr1(cbase^0x1800,DRegBuf[4]);
- swsetchr1(cbase^0x1c00,DRegBuf[5]);
-}
-
-static DECLFW(Super24hiwrite)
-{
- //printf("$%04x:$%02x, %d\n",A,V,scanline);
- switch(A&0xE001)
- {
- case 0x8000:
- if((V&0x40) != (MMC3_cmd&0x40))
- FixMMC3PRG(V);
- if((V&0x80) != (MMC3_cmd&0x80))
- FixMMC3CHR(V);
- MMC3_cmd = V;
- break;
-
- case 0x8001:
- {
- int cbase=(MMC3_cmd&0x80)<<5;
- DRegBuf[MMC3_cmd&0x7]=V;
- switch(MMC3_cmd&0x07)
- {
- case 0: V>>=1;swsetchr2((cbase^0x000),V);break;
- case 1: V>>=1;swsetchr2((cbase^0x800),V);break;
- case 2: swsetchr1(cbase^0x1000,V); break;
- case 3: swsetchr1(cbase^0x1400,V); break;
- case 4: swsetchr1(cbase^0x1800,V); break;
- case 5: swsetchr1(cbase^0x1C00,V); break;
- case 6: if (MMC3_cmd&0x40) swsetprg8(0xC000,V);
- else swsetprg8(0x8000,V);
- X6502_Rebase();
- break;
- case 7: swsetprg8(0xA000,V);
- X6502_Rebase();
- break;
- }
- }
- break;
-
- case 0xA000:
- mbia=V;
- setmirror((V&1)^1);
- break;
- }
-}
-
-
-DECLFW(Super24Write)
-{
- //printf("$%04x:$%02x\n",A,V);
- switch(A)
- {
- case 0x5ff0:sizer=V;
- FixMMC3PRG(MMC3_cmd);
- FixMMC3CHR(MMC3_cmd);
- break;
- case 0x5FF1:
- bigbank=V;
- FixMMC3PRG(MMC3_cmd);
- break;
- case 0x5FF2:
- bigbank2=V;
- FixMMC3CHR(MMC3_cmd);
- break;
- }
-}
-
-static void Super24Reset(void)
-{
- SetWriteHandler(0x8000,0xBFFF,Super24hiwrite);
- SetWriteHandler(0x5000,0x7FFF,Super24Write);
- SetWriteHandler(0xC000,0xFFFF,Sup24IRQWrite);
- SetReadHandler(0x8000,0xFFFF,CartBR);
- GameHBIRQHook=Sup24_hb;
- IRQCount=IRQLatch=IRQa=resetmode=0;
- sizer=0x24;
- bigbank=159;
- bigbank2=0;
-
- MMC3_cmd=0;
- DRegBuf[6]=0;
- DRegBuf[7]=1;
-
- FixMMC3PRG(0);
- FixMMC3CHR(0);
-}
-
-static void MrRestore(int version)
-{
- FixMMC3PRG(MMC3_cmd);
- FixMMC3CHR(MMC3_cmd);
- setmirror((mbia&1)^1);
-}
-
-void Super24_Init(void)
-{
- BoardPower=Super24Reset;
- SetupCartCHRMapping(0x10, GameMemBlock, 8192, 1);
- GameStateRestore=MrRestore;
-
- AddExState(GameMemBlock, 8192, 0, "CHRR");
- AddExState(DRegBuf, 8, 0, "DREG");
- AddExState(&IRQCount, 4, 1, "IRQC");
- AddExState(&IRQLatch, 4, 1, "IQL1");
- AddExState(&IRQa, 1, 0, "IRQA");
- AddExState(&sizer, 1, 0, "SIZA");
- AddExState(&bigbank, 1, 0, "BIG1");
- AddExState(&bigbank2, 1, 0, "BIG2");
-}
+/* FCE Ultra - NES/Famicom Emulator\r
+ *\r
+ * Copyright notice for this file:\r
+ * Copyright (C) 2005 CaH4e3\r
+ *\r
+ * This program is free software; you can redistribute it and/or modify\r
+ * it under the terms of the GNU General Public License as published by\r
+ * the Free Software Foundation; either version 2 of the License, or\r
+ * (at your option) any later version.\r
+ *\r
+ * This program is distributed in the hope that it will be useful,\r
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
+ * GNU General Public License for more details.\r
+ *\r
+ * You should have received a copy of the GNU General Public License\r
+ * along with this program; if not, write to the Free Software\r
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r
+ */\r
+\r
+#include "mapinc.h"\r
+#include "mmc3.h"\r
+\r
+static uint8 *CHRRAM = NULL;\r
+static uint8 resetmode;\r
+static int masko8[8]={63,31,15,1,3,0,0,0};\r
+\r
+static void Super24PW(uint32 A, uint8 V)\r
+{\r
+ uint32 NV=V&masko8[EXPREGS[0]&7];\r
+ NV|=(EXPREGS[1]<<1);\r
+ setprg8r((NV>>6)&0xF,A,NV);\r
+}\r
+\r
+static void Super24CW(uint32 A, uint8 V)\r
+{\r
+ if(EXPREGS[0]&0x20)\r
+ setchr1r(0x10,A,V);\r
+ else\r
+ {\r
+ uint32 NV=V|(EXPREGS[2]<<3);\r
+ setchr1r((NV>>9)&0xF,A,NV);\r
+ }\r
+}\r
+\r
+static DECLFW(Super24Write)\r
+{\r
+ switch(A)\r
+ {\r
+ case 0x5FF0: EXPREGS[0]=V;\r
+ FixMMC3PRG(MMC3_cmd);\r
+ FixMMC3CHR(MMC3_cmd);\r
+ break;\r
+ case 0x5FF1: EXPREGS[1]=V;\r
+ FixMMC3PRG(MMC3_cmd);\r
+ break;\r
+ case 0x5FF2: EXPREGS[2]=V;\r
+ FixMMC3CHR(MMC3_cmd);\r
+ break;\r
+ }\r
+}\r
+\r
+static DECLFW(Super24IRQ)\r
+{\r
+ switch(A&0xE001)\r
+ {\r
+ case 0xc000: IRQLatch=V;\r
+ if(resetmode==1)\r
+ IRQCount=IRQLatch;\r
+ break;\r
+ case 0xc001: resetmode=1;\r
+ IRQCount=IRQLatch;\r
+ break;\r
+ case 0xE000: IRQa=0;\r
+ X6502_IRQEnd(FCEU_IQEXT);\r
+ if(resetmode==1)\r
+ IRQCount=IRQLatch;\r
+ break;\r
+ case 0xE001: IRQa=1;\r
+ if(resetmode==1)\r
+ IRQCount=IRQLatch;\r
+ break;\r
+ }\r
+}\r
+\r
+static void Super24HB(void)\r
+{\r
+ resetmode=0;\r
+ if(IRQCount!=0)\r
+ {\r
+ IRQCount--;\r
+ if(IRQCount==0)\r
+ {\r
+ if(IRQa)\r
+ {\r
+ resetmode=1;\r
+ X6502_IRQBegin(FCEU_IQEXT);\r
+ }\r
+ }\r
+ }\r
+}\r
+\r
+static void Super24Power(void)\r
+{\r
+ EXPREGS[0]=0x24;\r
+ EXPREGS[1]=159;\r
+ EXPREGS[2]=0;\r
+ GenMMC3Power();\r
+ SetWriteHandler(0x5000,0x7FFF,Super24Write);\r
+ SetWriteHandler(0xC000,0xFFFF,Super24IRQ);\r
+ SetReadHandler(0x8000,0xFFFF,CartBR);\r
+}\r
+\r
+static void Super24Reset(void)\r
+{\r
+ EXPREGS[0]=0x24;\r
+ EXPREGS[1]=159;\r
+ EXPREGS[2]=0;\r
+ MMC3RegReset();\r
+}\r
+\r
+static void Super24Close(void)\r
+{\r
+ if(CHRRAM)\r
+ FCEU_gfree(CHRRAM);\r
+ CHRRAM = NULL;\r
+}\r
+\r
+void Super24_Init(CartInfo *info)\r
+{\r
+ info->Power=Super24Power;\r
+ info->Reset=Super24Reset;\r
+ info->Close=Super24Close;\r
+ cwrap=Super24CW;\r
+ pwrap=Super24PW;\r
+ CHRRAM=(uint8*)FCEU_gmalloc(8192);\r
+ SetupCartCHRMapping(0x10, CHRRAM, 8192, 1);\r
+ GameHBIRQHook=Super24HB;\r
+ AddExState(CHRRAM, 8192, 0, "CHRR");\r
+ AddExState(EXPREGS, 3, 0, "BIG2");\r
+}\r
notaz.gp2x.de / fceu.git / blobdiff