107 lines
2.6 KiB
C
107 lines
2.6 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_tc3294.h"
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#include "asic_mmc3.h"
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static void (*TC3294_cbSync)();
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static uint8 TC3294_index;
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static uint8 TC3294_reg[4];
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static SFORMAT TC3294_state[] = {
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{ TC3294_reg, 8, "329S" },
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{&TC3294_index, 1, "329I" },
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{ 0 }
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};
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void TC3294_syncWRAM (int OR) {
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MMC3_syncWRAM(OR);
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}
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void TC3294_syncPRG (int AND, int OR) {
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int prgAND = ~TC3294_reg[3] &0x3F;
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int prgOR = TC3294_reg[1] | TC3294_reg[2] <<2 &0x300;
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MMC3_syncPRG(prgAND &AND, prgOR &~prgAND &AND | OR &~AND);
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}
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void TC3294_syncCHR (int AND, int OR) {
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int chrAND = 0xFF >>(~TC3294_reg[2] &0xF);
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int chrOR = TC3294_reg[0] | TC3294_reg[2] <<4 &0xF00;
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MMC3_syncCHR(chrAND &AND, chrOR &~chrAND &AND | OR &~AND);
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}
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void TC3294_syncMirror () {
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MMC3_syncMirror();
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}
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DECLFW(TC3294_write) {
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if (~TC3294_reg[3] &0x40) {
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TC3294_reg[TC3294_index++ &3] = V;
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TC3294_cbSync();
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}
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}
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static void TC3294_clear () {
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TC3294_reg[0] = 0x00; TC3294_reg[1] = 0x00; TC3294_reg[2] = 0x0F; TC3294_reg[3] = 0x00;
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TC3294_index = 0;
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TC3294_cbSync();
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}
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static void TC3294_setHandlers () {
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}
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static void TC3294_configure (void (*sync)()) {
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TC3294_cbSync = sync;
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}
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void TC3294_activate (uint8 clear, void (*sync)()) {
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MMC3_activate(clear, sync, MMC3_TYPE_AX5202P, NULL, NULL, NULL, TC3294_write);
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TC3294_configure(sync);
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TC3294_setHandlers();
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if (clear)
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TC3294_clear();
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else
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TC3294_cbSync();
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}
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void TC3294_addExState () {
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AddExState(TC3294_state, ~0, 0, 0);
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}
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void TC3294_restore (int version) {
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TC3294_cbSync();
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}
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void TC3294_power () {
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MMC3_power();
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TC3294_setHandlers();
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TC3294_clear();
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}
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void TC3294_init (CartInfo *info, void (*sync)()) {
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MMC3_init(info, sync, MMC3_TYPE_AX5202P, NULL, NULL, NULL, TC3294_write);
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TC3294_addExState();
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TC3294_configure(TC3294_cbSync);
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info->Power = TC3294_power;
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info->Reset = TC3294_cbSync;
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GameStateRestore = TC3294_restore;
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}
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