mirror of
https://github.com/dborth/fceugx.git
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129 lines
3.9 KiB
C++
129 lines
3.9 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) 2009 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "mapinc.h"
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static uint8 reg[8];
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static uint32 lastnt = 0;
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static uint8 *WRAM = NULL;
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static uint32 WRAMSIZE;
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static SFORMAT StateRegs[] =
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{
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{ reg, 2, "REG" },
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{ &lastnt, 4, "LNT" },
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{ 0 }
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};
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static uint8 bs_tbl[128] = {
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0x03, 0x13, 0x23, 0x33, 0x03, 0x13, 0x23, 0x33, 0x03, 0x13, 0x23, 0x33, 0x03, 0x13, 0x23, 0x33, // 00
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0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, // 10
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0x03, 0x13, 0x23, 0x33, 0x03, 0x13, 0x23, 0x33, 0x03, 0x13, 0x23, 0x33, 0x03, 0x13, 0x23, 0x33, // 20
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0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, // 30
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0x02, 0x12, 0x22, 0x32, 0x02, 0x12, 0x22, 0x32, 0x02, 0x12, 0x22, 0x32, 0x02, 0x12, 0x22, 0x32, // 40
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0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, 0x45, 0x67, // 50
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0x02, 0x12, 0x22, 0x32, 0x02, 0x12, 0x22, 0x32, 0x02, 0x12, 0x22, 0x32, 0x00, 0x10, 0x20, 0x30, // 60
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0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, 0x47, 0x67, // 70
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};
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static uint8 br_tbl[16] = {
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0x00, 0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02,
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};
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static void Sync(void) {
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setchr8(0);
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setprg8r(0x10, 0x6000, 0);
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if(PRGsize[0] == 512 * 1024) {
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if(reg[0] & 0x010) {
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setprg32(0x8000, reg[0] & 7);
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} else {
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if(reg[0] & 0x40)
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setprg8(0x8000, (reg[0] & 0x0F) | 0x20 | ((reg[0] & 0x20) >> 1));
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}
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if((reg[0] & 0x18) == 0x18)
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setmirror(MI_H);
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else
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setmirror(MI_V);
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} else {
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setprg16(0x8000, bs_tbl[reg[0] & 0x7f] >> 4);
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setprg16(0xc000, bs_tbl[reg[0] & 0x7f] & 0xf);
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setmirror(MI_V);
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}
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}
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static DECLFW(UNLPEC586Write) {
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reg[(A & 0x700) >> 8] = V;
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PEC586Hack = (reg[0] & 0x80) >> 7;
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// FCEU_printf("bs %04x %02x\n", A, V);
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Sync();
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}
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static DECLFR(UNLPEC586Read) {
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// FCEU_printf("read %04x\n", A);
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return (X.DB & 0xD8) | br_tbl[reg[4] >> 4];
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}
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static DECLFR(UNLPEC586ReadHi) {
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if((reg[0] & 0x10) || ((reg[0] & 0x40) && (A < 0xA000)))
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return CartBR(A);
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else
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return PRGptr[0][((0x0107 | ((A >> 7) & 0x0F8)) << 10) | (A & 0x3FF)];
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}
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static void UNLPEC586Power(void) {
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if(PRGsize[0] == 512 * 1024)
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reg[0] = 0x00;
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else
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reg[0] = 0x0E;
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Sync();
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SetReadHandler(0x6000, 0x7FFF, CartBR);
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SetWriteHandler(0x6000, 0x7FFF, CartBW);
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if(PRGsize[0] == 512 * 1024)
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SetReadHandler(0x8000, 0xFFFF, UNLPEC586ReadHi);
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else
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SetReadHandler(0x8000, 0xFFFF, CartBR);
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SetWriteHandler(0x5000, 0x5fff, UNLPEC586Write);
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SetReadHandler(0x5000, 0x5fff, UNLPEC586Read);
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FCEU_CheatAddRAM(WRAMSIZE >> 10, 0x6000, WRAM);
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}
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static void UNLPEC586Close(void) {
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if (WRAM)
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FCEU_gfree(WRAM);
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WRAM = NULL;
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}
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static void StateRestore(int version) {
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Sync();
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}
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void UNLPEC586Init(CartInfo *info) {
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info->Power = UNLPEC586Power;
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info->Close = UNLPEC586Close;
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GameStateRestore = StateRestore;
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WRAMSIZE = 8192;
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WRAM = (uint8*)FCEU_gmalloc(WRAMSIZE);
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SetupCartPRGMapping(0x10, WRAM, WRAMSIZE, 1);
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AddExState(WRAM, WRAMSIZE, 0, "WRAM");
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AddExState(&StateRegs, ~0, 0, 0);
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}
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