mirror of
https://github.com/dborth/fceugx.git
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98 lines
2.6 KiB
C++
98 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) 2005 CaH4e3
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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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* BMC 42-in-1 "reset switch" type
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*/
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#include "mapinc.h"
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static uint8 bank_mode;
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static uint8 bank_value;
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static uint8 prgb[4];
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static SFORMAT StateRegs[] =
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{
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{ &bank_mode, 1, "BNM" },
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{ &bank_value, 1, "BMV" },
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{ prgb, 4, "PRGB" },
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{ 0 }
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};
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static void Sync(void) {
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// FCEU_printf("%02x: %02x %02x\n", bank_mode, bank_value, prgb[0]);
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switch (bank_mode & 7) {
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case 0:
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setprg32(0x8000, bank_value & 7); break;
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case 1:
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setprg16(0x8000, ((8 + (bank_value & 7)) >> 1) + prgb[1]);
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setprg16(0xC000, (bank_value & 7) >> 1);
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case 4:
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setprg32(0x8000, 8 + (bank_value & 7)); break;
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case 5:
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setprg16(0x8000, ((8 + (bank_value & 7)) >> 1) + prgb[1]);
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setprg16(0xC000, ((8 + (bank_value & 7)) >> 1) + prgb[3]);
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case 2:
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setprg8(0x8000, prgb[0] >> 2);
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setprg8(0xa000, prgb[1]);
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setprg8(0xc000, prgb[2]);
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setprg8(0xe000, ~0);
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break;
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case 3:
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setprg8(0x8000, prgb[0]);
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setprg8(0xa000, prgb[1]);
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setprg8(0xc000, prgb[2]);
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setprg8(0xe000, prgb[3]);
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break;
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}
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}
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static DECLFW(BMC13in1JY110Write) {
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// FCEU_printf("%04x:%04x\n",A,V);
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switch (A) {
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case 0x8000:
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case 0x8001:
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case 0x8002:
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case 0x8003: prgb[A & 3] = V; break;
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case 0xD000: bank_mode = V; break;
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case 0xD001: setmirror(V & 3);
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case 0xD002: break;
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case 0xD003: bank_value = V; break;
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}
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Sync();
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}
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static void BMC13in1JY110Power(void) {
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prgb[0] = prgb[1] = prgb[2] = prgb[3] = 0;
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bank_mode = 0;
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bank_value = 0;
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setprg32(0x8000, 0);
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setchr8(0);
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SetWriteHandler(0x8000, 0xFFFF, BMC13in1JY110Write);
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SetReadHandler(0x8000, 0xFFFF, CartBR);
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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 BMC13in1JY110_Init(CartInfo *info) {
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info->Power = BMC13in1JY110Power;
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AddExState(&StateRegs, ~0, 0, 0);
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GameStateRestore = StateRestore;
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}
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