73 lines
1.6 KiB
Text
73 lines
1.6 KiB
Text
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/*
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* This file is part of libsidplayfp, a SID player engine.
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*
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* Copyright 2012-2013 Leandro Nini <drfiemost@users.sourceforge.net>
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* Copyright 2010 Antti Lankila
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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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#ifndef SYSTEMRAMBANK_H
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#define SYSTEMRAMBANK_H
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#include <stdint.h>
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#include <cstring>
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#include "Bank.h"
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namespace libsidplayfp
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{
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/**
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* Area backed by RAM.
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*
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* @author Antti Lankila
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*/
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class SystemRAMBank : public Bank
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{
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friend class MMU;
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private:
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/// C64 RAM area
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uint8_t ram[0x10000];
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public:
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/**
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* Initialize RAM with powerup pattern.
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*/
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void reset()
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{
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memset(ram, 0, 0x10000);
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for (int i = 0x40; i < 0x10000; i += 0x80)
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{
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memset(ram+i, 0xff, 0x40);
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}
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}
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uint8_t peek(uint_least16_t address) override
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{
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return ram[address];
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}
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void poke(uint_least16_t address, uint8_t value) override
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{
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ram[address] = value;
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}
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};
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}
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#endif
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