62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
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/* 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 "vrc2and4.h"
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static uint8 prg;
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static SFORMAT UNLCITYFIGHT_stateRegs[] ={
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{ &prg, 1, "PRG8" },
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{ 0 }
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};
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static void sync () {
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setprg32(0x8000, prg);
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VRC24_syncCHR(0x1FF, 0x000);
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VRC24_syncMirror();
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}
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DECLFW(UNLCITYFIGHT_externalSelect) {
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if (A &0x800)
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(GetWriteHandler(0x4011))(0x4011, V <<3 &0x78);
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else {
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prg =V >>2;
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VRC24_Sync();
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}
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}
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DECLFW(UNLCITYFIGHT_unscrambleAddress) {
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VRC24_writeReg(A &~0x6000 | A <<1 &0x4000 | A >>1 &0x2000, V);
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}
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void UNLCITYFIGHT_power(void) {
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prg =0;
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VRC24_power();
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SetWriteHandler(0x8000, 0xFFFF, UNLCITYFIGHT_unscrambleAddress);
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}
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void UNLCITYFIGHT_Init (CartInfo *info) {
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VRC24_init(info, sync, 0x04, 0x08, 1, 1, 0);
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VRC24_ExternalSelect =UNLCITYFIGHT_externalSelect;
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AddExState(UNLCITYFIGHT_stateRegs, ~0, 0, 0);
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info->Power =UNLCITYFIGHT_power;
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}
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