64 lines
1.7 KiB
C
64 lines
1.7 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) 2025 NewRisingSun
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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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#include "asic_vrc2and4.h"
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static uint8 reg;
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static SFORMAT stateRegs[] ={
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{ ®, 1, "EXP0" },
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{ 0 }
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};
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static void sync () {
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if (reg &0x80) {
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setprg32(0x8000, reg >>5 &6 | VRC24_getCHRBank(0) >>2 &1);
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setchr8(0x40 | reg >>3 &8 | VRC24_getCHRBank(0) &7);
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} else {
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VRC24_syncPRG(0x0F, 0x00);
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VRC24_syncCHR(0x1FF, 0x000);
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}
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VRC24_syncMirror();
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}
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static DECLFW (writeReg) {
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reg =A &0xFF;
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VRC24_writeReg(A, V);
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}
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static void power (void) {
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reg = 0xC0;
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VRC24_power();
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SetWriteHandler(0x8000, 0xFFFF, writeReg);
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}
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static void reset (void) {
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reg = 0xC0;
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VRC24_clear();
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}
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void Mapper398_Init (CartInfo *info) {
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VRC4_init(info, sync, 0x01, 0x02, 1, NULL, NULL, NULL, NULL, NULL);
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info->Power = power;
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info->Reset = reset;
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AddExState(stateRegs, ~0, 0, 0);
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}
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