107 lines
2.7 KiB
C
107 lines
2.7 KiB
C
/* FCEUmm - NES/Famicom Emulator
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*
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* Copyright notice for this file:
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* Copyright (C) 2020
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (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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/* FDS Conversion - Kid Icarus (パルテナの鏡) (Parthena) */
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#include "mapinc.h"
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#include "../fds_apu.h"
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static uint8 preg;
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static uint8 mirr;
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static uint8 WRAM[8192];
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static SFORMAT StateRegs[] =
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{
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{ &preg, 1, "PREG" },
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{ &mirr, 1, "MIRR" },
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{ 0 }
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};
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static uint32 GetWRAMAddress(uint32 A) {
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return ((A & 0x1FFF) |
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((A < 0xC000) ? 0x1000 : 0x0000) |
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((A < 0x8000) ? 0x0800 : 0x000));
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}
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static void Sync(void) {
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setprg8(0x6000, 13);
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setprg8(0x8000, 12);
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setprg8(0xA000, preg);
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setprg8(0xC000, 14);
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setprg8(0xE000, 15);
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setchr8(0);
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setmirror(((mirr & 8) >> 3) ^ 1);
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}
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static DECLFR(M539Read) {
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switch (A >> 8) {
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case 0x60: case 0x62: case 0x64: case 0x65: case 0x82: case 0xC0: case 0xC1: case 0xC2:
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case 0xC3: case 0xC4: case 0xC5: case 0xC6: case 0xC7: case 0xC8: case 0xC9: case 0xCA:
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case 0xCB: case 0xCC: case 0xCD: case 0xCE: case 0xCF: case 0xD0: case 0xD1: case 0xDF:
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return WRAM[GetWRAMAddress(A)];
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default:
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return CartBR(A);
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}
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}
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static DECLFW(M539Write) {
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switch (A >> 8) {
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case 0x60: case 0x62: case 0x64: case 0x65: case 0x82: case 0xC0: case 0xC1: case 0xC2:
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case 0xC3: case 0xC4: case 0xC5: case 0xC6: case 0xC7: case 0xC8: case 0xC9: case 0xCA:
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case 0xCB: case 0xCC: case 0xCD: case 0xCE: case 0xCF: case 0xD0: case 0xD1: case 0xDF:
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WRAM[GetWRAMAddress(A)] = V;
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break;
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default:
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switch (A & 0xF000) {
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case 0xA000:
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preg = V;
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Sync();
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break;
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case 0xF000:
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if ((A & 0x25) == 0x25) {
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mirr = V;
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Sync();
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}
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break;
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}
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break;
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}
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}
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static void M539Power(void) {
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FDSSoundPower();
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preg = 0;
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mirr = 0;
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Sync();
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SetReadHandler(0x6000, 0xFFFF, M539Read);
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SetWriteHandler(0x6000, 0xFFFF, M539Write);
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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 Mapper539_Init(CartInfo *info) {
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info->Power = M539Power;
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GameStateRestore = StateRestore;
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AddExState(WRAM, 8192, 0, "WRAM");
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AddExState(&StateRegs, ~0, 0, 0);
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}
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