mirror of
https://github.com/dborth/fceugx.git
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149 lines
3.7 KiB
C++
149 lines
3.7 KiB
C++
/* FCE Ultra - NES/Famicom Emulator
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*
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* Copyright notice for this file:
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* Copyright (C) 2007 CaH4e3
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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0000 - 1FFF - RAM
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2000 - 23FF - PPU
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2400 - 27FF - Write: "PAG" / Read: --
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2800 - 2BFF - Write: "BNK" / Read: "STS"
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2C00 - 2FFF - Write: "UWR" / Read: "URD"
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3000 - 3FFF - Small Flash Page (â ðåãèñòðå BNK)
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4000 - 7FFF - Free
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8000 - FFFF - Cart/Big Flash Page (ñìîòðè ðåãèñòð PAG)
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Áèòû:
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Ðåãèñòð [PAG], ïî ñáðîñó äîëæåí áûòü = $00.
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D3-D0 - Big Page High Address (D3,D2,D1,D0,A14,A13,A12,A11,A10,A9,A8,A7,A6,A5,A4,A3,A2,A1,A0)
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D4 - VMD áèò. Åñëè =0, òî ê PPU ïîäêëþ÷åíî âíóòðåíåå ÎÇó íà 8Êá, åñëè =1 - òî êàðòðèäæ.
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D5 - STR áèò. Åñëè =0, òî âìåñòî êàðòà ïî àäðåñàì 8000-FFFF âíóòðåííÿÿ ôëýø, =1 - êàðò.
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Ðåãèñòð [BNK], íå ïðåäóñòàíàâëèâàåòñÿ
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D6-D0 - Small Page High Address (D6,D5,D4,D3,D2,D1,D0,A11,A10,A9,A8,A7,A6,A5,A4,A3,A2,A1,A0)
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D7 - S/W áèò. Óïðàâëÿåò USB ìîñòîì, â ýìóëå ðåàëèçîâûâàòü íå íàäî.
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Ðåãèñòðû [UWR]/[URD], íå ïðåäóñòàíàâëèâàþòñÿ, â ýìóëå ðåàëèçîâûâàòü íå íàäî.
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[UWR] - Ðåãèñòð çàïèñè äàííûõ â USB ìîñò.
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[URD] - Ðåãèñòð ÷òåíèÿ èç USB ìîñòà.
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*/
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#include "mapinc.h"
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#include "mmc3.h"
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static uint8 reg[3];
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static uint8 *CHRRAM=NULL; // there is no more extern CHRRAM in mmc3.h
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// I need chrram here and local static == local
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static uint32 CHRRAMSIZE;
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static SFORMAT StateRegs[]=
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{
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{reg, 3, "REGS"},
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{0}
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};
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static void Sync(void)
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{
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setprg4r(1,0x3000,reg[1]&0x7F);
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FixMMC3PRG(MMC3_cmd);
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FixMMC3CHR(MMC3_cmd);
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}
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static void MCopyFamiMMC3PW(uint32 A, uint8 V)
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{
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if(reg[0]&0x20)
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setprg8r(0,A,V);
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else
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setprg32r(1,0x8000,reg[0]&0x0F);
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}
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static void MCopyFamiMMC3CW(uint32 A, uint8 V)
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{
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if(reg[0]&0x20)
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setchr1r(0,A,V);
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else
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setchr8r(0x10,0);
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}
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static DECLFW(MCopyFamiMMC3WritePAG)
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{
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reg[0]=V;
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Sync();
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}
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static DECLFW(MCopyFamiMMC3WriteBNK)
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{
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reg[1]=V;
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Sync();
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}
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static DECLFW(MCopyFamiMMC3WriteUSB)
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{
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reg[2]=V;
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}
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static void MCopyFamiMMC3Power(void)
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{
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reg[0] = 0;
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GenMMC3Power();
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Sync();
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SetReadHandler(0x3000,0x3FFF,CartBR);
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SetWriteHandler(0x3000,0x3FFF,CartBW);
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SetWriteHandler(0x2400,0x27FF,MCopyFamiMMC3WritePAG);
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SetWriteHandler(0x2800,0x2BFF,MCopyFamiMMC3WriteBNK);
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SetWriteHandler(0x2C00,0x2FFF,MCopyFamiMMC3WriteUSB);
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}
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static void MCopyFamiMMC3Reset(void)
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{
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reg[0] = 0;
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MMC3RegReset();
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Sync();
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}
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static void MCopyFamiMMC3Close(void)
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{
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if(CHRRAM)
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FCEU_gfree(CHRRAM);
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CHRRAM=NULL;
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}
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static void StateRestore(int version)
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{
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Sync();
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}
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void MapperCopyFamiMMC3_Init(CartInfo *info)
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{
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GenMMC3_Init(info, 512, 512, 0, 0);
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cwrap=MCopyFamiMMC3CW;
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pwrap=MCopyFamiMMC3PW;
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info->Reset=MCopyFamiMMC3Reset;
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info->Power=MCopyFamiMMC3Power;
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info->Close=MCopyFamiMMC3Close;
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GameStateRestore=StateRestore;
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CHRRAMSIZE=8192;
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CHRRAM=(uint8*)FCEU_gmalloc(CHRRAMSIZE);
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SetupCartPRGMapping(0x10,CHRRAM,CHRRAMSIZE,1);
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AddExState(CHRRAM, CHRRAMSIZE, 0, "SRAM");
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AddExState(&StateRegs, ~0, 0, 0);
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}
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