59 lines
1.7 KiB
C++
59 lines
1.7 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-23 divingkatae and maximum
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(theweirdo) spatium
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(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
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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 <https://www.gnu.org/licenses/>.
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*/
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#ifndef NVRAM_H
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#define NVRAM_H
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#include <devices/common/hwcomponent.h>
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#include <cinttypes>
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#include <memory>
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#include <string>
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/** @file Non-volatile RAM emulation.
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It implements a non-volatile random access storage whose content will be
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automatically saved to and restored from the dedicated file.
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*/
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class NVram : public HWComponent {
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public:
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NVram(std::string file_name = "nvram.bin", uint32_t ram_size = 8192);
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~NVram();
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static std::unique_ptr<HWComponent> create() {
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return std::unique_ptr<NVram>(new NVram());
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}
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uint8_t read_byte(uint32_t offset);
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void write_byte(uint32_t offset, uint8_t value);
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private:
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std::string file_name; // file name for the backing file
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uint16_t ram_size; // NVRAM size
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std::unique_ptr<uint8_t[]> storage;
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void init();
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void save();
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};
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#endif /* NVRAM_H */
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