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Annotation of nono/vm/sram.h, revision 1.1.1.8

1.1       root        1: //
                      2: // nono
1.1.1.3   root        3: // Copyright (C) 2020 nono project
                      4: // Licensed under nono-license.txt
1.1       root        5: //
                      6: 
1.1.1.8 ! root        7: //
        !             8: // SRAM
        !             9: //
        !            10: 
1.1       root       11: #pragma once
                     12: 
                     13: #include "device.h"
1.1.1.3   root       14: #include "mappedfile.h"
1.1       root       15: 
1.1.1.7   root       16: class SRAMDevice : public IODevice
1.1       root       17: {
1.1.1.3   root       18:        using inherited = IODevice;
1.1.1.8 ! root       19: 
1.1       root       20:        static const uint32 baseaddr = 0xed0000;
                     21: 
1.1.1.3   root       22:        // Pluto-X によるホストファイル起動アドレス
                     23:        static const uint32 plutoaddr = 0xeac000;
                     24: 
1.1       root       25:  public:
                     26:        SRAMDevice();
1.1.1.5   root       27:        virtual ~SRAMDevice() override;
1.1       root       28: 
1.1.1.3   root       29:        bool Init() override;
1.1.1.8 ! root       30:        void ResetHard(bool poweron) override;
1.1       root       31: 
1.1.1.3   root       32:        uint64 Read8(uint32 addr) override;
                     33:        uint64 Read16(uint32 addr) override;
                     34:        uint64 Write8(uint32 addr, uint32 data) override;
                     35:        uint64 Write16(uint32 addr, uint32 data) override;
                     36:        uint64 Peek8(uint32 addr) override;
1.1       root       37: 
                     38:        void write_enable(bool value);
                     39: 
                     40:  private:
1.1.1.2   root       41:        // アドレスデコーダ
                     42:        uint64 Decoder(uint32 addr) const;
                     43: 
1.1.1.8 ! root       44:        // ホストファイル起動用の読み出し値を返す
        !            45:        uint32 PeekHostBoot(uint32 offset) const;
        !            46: 
1.1.1.3   root       47:        // ファイル
                     48:        std::string filename {};
                     49:        MappedFile file {};
                     50:        uint8 *mem {};
1.1       root       51: 
1.1.1.4   root       52:        bool writeable {};
1.1       root       53: };
                     54: 
1.1.1.8 ! root       55: extern SRAMDevice *gSRAM;

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