95 lines
2.4 KiB
C
95 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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*
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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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/* NES 2.0 Mapper 527 is used for a bootleg version of
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* Taito's 不動明王伝 (Fudō Myōō Den).
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* Its UNIF board name is UNL-AX-40G. The original INES Mapper 207 is
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* replaced with a VRC2 clone (A0/A1, i.e. VRC2b) while retaining
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* Mapper 207's extended mirroring.
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*/
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#include "mapinc.h"
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static uint8 preg[2], creg[8], NT[2];
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static SFORMAT StateRegs[] =
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{
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{ preg, 2, "PREG" },
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{ creg, 8, "CREG" },
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{ NT, 2, "NMT" },
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{ 0 }
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};
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static void Sync(void) {
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uint8 i;
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setprg8(0x8000, preg[0]);
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setprg8(0xA000, preg[1]);
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setprg8(0xC000, 0x1E);
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setprg8(0xE000, 0x1F);
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for (i = 0; i < 8; i++)
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setchr1(i << 10, creg[i]);
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setmirrorw(NT[0], NT[0], NT[1], NT[1]);
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}
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static DECLFW(UNLAX40GWrite8) {
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A &= 0xF003;
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preg[0] = V & 0x1F;
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Sync();
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}
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static DECLFW(UNLAX40GWriteA) {
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A &= 0xF003;
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preg[1] = V & 0x1F;
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Sync();
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}
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static DECLFW(UNLAX40GWriteB) {
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uint16 i, shift;
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A &= 0xF003;
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i = ((A >> 1) & 1) | ((A - 0xB000) >> 11);
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shift = ((A & 1) << 2);
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creg[i] = (creg[i] & (0xF0 >> shift)) | ((V & 0xF) << shift);
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if (i < 2)
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NT[i] = (creg[i] & 0x80) >> 7;
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Sync();
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}
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static void UNLAX40GPower(void) {
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Sync();
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SetReadHandler(0x8000, 0xFFFF, CartBR);
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SetWriteHandler(0x8000, 0x8FFF, UNLAX40GWrite8);
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SetWriteHandler(0xA000, 0xAFFF, UNLAX40GWriteA);
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SetWriteHandler(0xB000, 0xEFFF, UNLAX40GWriteB);
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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 UNLAX40G_Init(CartInfo *info) {
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info->Power = UNLAX40GPower;
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GameStateRestore = StateRestore;
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AddExState(&StateRegs, ~0, 0, 0);
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}
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/*void UNLAX40G_Init(CartInfo *info); // m527
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{ "AX-40G", UNLAX40G_Init, 0 },
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{ "JC-016-2", Mapper205_Init, 0 },
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*/
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