61 lines
1.7 KiB
C++
61 lines
1.7 KiB
C++
/*
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epple2
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Copyright © 2008, 2019, Christopher Alan Mosher, Shelton, CT, USA. <cmosher01@gmail.com>
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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 3 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "memory.h"
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#include <vector>
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#include <algorithm>
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#include <istream>
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#include <cstdlib>
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#include <cstddef>
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Memory::Memory(const size_t n):
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bytes(n),
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clear_value(0u),
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missing_bits(0u) {
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}
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void Memory::clear() {
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std::fill(this->bytes.begin(), this->bytes.end(), this->clear_value);
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}
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void Memory::load(const std::uint16_t base, std::istream& in) {
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in.read(reinterpret_cast<char*>(&this->bytes.at(base)), static_cast<ptrdiff_t>(this->bytes.size()-base));
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}
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void Memory::powerOn() {
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clear();
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}
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void Memory::powerOff() {
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clear();
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}
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size_t Memory::size() const {
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return this->bytes.size();
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}
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std::uint8_t Memory::read(const std::uint16_t address, const std::uint8_t data) const {
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return (this->bytes.at(address) & ~this->missing_bits) | (data & this->missing_bits);
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}
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void Memory::write(const std::uint16_t address, const std::uint8_t data) {
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this->bytes.at(address) = data;
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}
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