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56 lines
1.7 KiB
C++
56 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) 2016 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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* Test Ver. 1.01 Dlya Proverki TV Pristavok (RT-01, by SS aka Snake)
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* A simple board with 16K PRG ROM + 2K CHR ROM with no mapper, hardwired mirroring
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* PRG EPROM has copy protected areas with "weak bits", which is tested at some
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* points of the program. Trying to simalate "weak bits" behaviour
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*
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*/
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#include "mapinc.h"
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extern u64 xoroshiro128plus_next(); // deterministic random
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static DECLFR(UNLRT01Read) {
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// u16 i, prot_areas[2][2] = {
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// { 0x8E80, 0x8EFF },
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// { 0xFE80, 0xFEFF },
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// };
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if(((A >= 0xCE80) && (A < 0xCF00)) ||
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((A >= 0xFE80) && (A < 0xFF00))) {
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return 0xF2 | (xoroshiro128plus_next() & 0x0D);
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} else
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return CartBR(A);
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}
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static void UNLRT01Power(void) {
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setprg16(0x8000, 0);
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setprg16(0xC000, 0);
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setchr2(0x0000,0);
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setchr2(0x0800,0);
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setchr2(0x1000,0);
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setchr2(0x1800,0);
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SetReadHandler(0x8000, 0xFFFF, UNLRT01Read);
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}
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void UNLRT01_Init(CartInfo *info) {
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info->Power = UNLRT01Power;
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}
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