74bd49bfd8
- makes this consistent with the rest of the mapper files and codebase in general - this affects new and edited files in recent commits
99 lines
2.4 KiB
C
99 lines
2.4 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 negativeExponent
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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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/* NES 2.0 Mapper 382 - denotes the 830928C circuit board,
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* used on a 512 KiB 5-in-1 and a 1 MiB 9-in-1 multicart containing
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* the BNROM game Journey to the West and Capcom/Konami UNROM games.
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*/
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#include "mapinc.h"
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static uint8 preg[2];
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static uint8 mode;
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static uint8 mirr;
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static uint8 lock;
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static SFORMAT StateRegs[] = {
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{ &preg[0], 1, "PRG0" },
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{ &preg[1], 1, "PRG1" },
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{ &mode, 1, "MODE" },
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{ &mirr, 1, "MIRR" },
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{ &lock, 1, "LOCK" },
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{ 0 }
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};
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static void Sync(void) {
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switch (mode) {
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case 1:
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/* bnrom */
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setprg32(0x8000, (preg[1] << 2) | (preg[0] & 3));
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break;
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default:
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/* unrom */
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setprg16(0x8000, (preg[1] << 3) | (preg[0] & 7));
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setprg16(0xC000, (preg[1] << 3) | 7);
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break;
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}
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setchr8(0);
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setmirror(mirr ^ 1);
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/* FCEU_printf("inB[0]:%02x outB[1]:%02x mode:%02x mirr:%02x lock:%02x\n", preg[0], preg[1], mode, mirr, lock); */
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}
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static DECLFW(M382Write) {
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if (!lock) {
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preg[1] = (A & 0x07);
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mode = (A & 0x08) >> 3;
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mirr = (A & 0x10) >> 4;
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lock = (A & 0x20) >> 5;
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}
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/* inner bank subject to bus conflicts */
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preg[0] = V & CartBR(A);
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Sync();
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}
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static void M382Power(void) {
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preg[0] = preg[1] = 0;
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mode = 0;
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mirr = 0;
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lock = 0;
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Sync();
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SetReadHandler(0x8000, 0xFFFF, CartBR);
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SetWriteHandler(0x8000, 0xFFFF, M382Write);
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}
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static void M382Reset(void) {
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preg[1] = 0;
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mode = 0;
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mirr = 0;
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lock = 0;
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Sync();
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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 Mapper382_Init(CartInfo* info) {
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info->Power = M382Power;
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info->Reset = M382Reset;
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GameStateRestore = StateRestore;
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AddExState(&StateRegs, ~0, 0, 0);
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}
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