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Annotation of nono/vm/extram.h, revision 1.1.1.4

1.1       root        1: //
                      2: // nono
                      3: // Copyright (C) 2023 nono project
                      4: // Licensed under nono-license.txt
                      5: //
                      6: 
                      7: //
                      8: // X68030 勝手に拡張メモリ
                      9: //
                     10: 
                     11: #pragma once
                     12: 
                     13: #include "device.h"
                     14: 
                     15: class ExtRAMDevice : public IODevice
                     16: {
                     17:        using inherited = IODevice;
                     18:  public:
                     19:        ExtRAMDevice();
1.1.1.2   root       20:        ~ExtRAMDevice() override;
1.1       root       21: 
                     22:        bool Init() override;
                     23:        void ResetHard(bool poweron) override;
                     24: 
1.1.1.3   root       25:        busdata Read(busaddr addr) override;
                     26:        busdata Write(busaddr, uint32 data) override;
                     27:        busdata Peek1(uint32 addr) override;
                     28:        bool Poke1(uint32 addr, uint32 data) override;
1.1       root       29: 
                     30:        // 拡張メモリ容量(バイト単位)を取得
                     31:        int GetSize() const     { return ram_size; }
                     32:        // 拡張メモリ容量(MB単位)を取得
                     33:        int GetSizeMB() const { return ram_size / 1024 / 1024; }
                     34: 
                     35:  private:
                     36:        inline uint32 Decoder(uint32) const;
                     37: 
                     38:        std::unique_ptr<uint8[]> ram {};
                     39: 
                     40:        // 拡張メモリの開始アドレス
                     41:        uint32 ram_addr {};
                     42: 
                     43:        // 拡張メモリ容量(バイト単位)。ram[] の確保したバイト数
                     44:        uint ram_size {};
                     45: };
                     46: 
1.1.1.4 ! root       47: inline ExtRAMDevice *GetExtRAMDevice() {
1.1       root       48:        return Object::GetObject<ExtRAMDevice>(OBJ_EXTRAM);
                     49: }

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