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Annotation of nono/vm/extram.h, revision 1.1.1.1

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();
                     20:        virtual ~ExtRAMDevice() override;
                     21: 
                     22:        bool Init() override;
                     23:        void ResetHard(bool poweron) override;
                     24: 
                     25:        uint64 Read8(uint32 addr) override;
                     26:        uint64 Read16(uint32 addr) override;
                     27:        uint64 Read32(uint32 addr) override;
                     28:        uint64 Write8(uint32 addr, uint32 data) override;
                     29:        uint64 Write16(uint32 addr, uint32 data) override;
                     30:        uint64 Write32(uint32 addr, uint32 data) override;
                     31:        uint64 Peek8(uint32 addr) override;
                     32:        uint64 Poke8(uint32 addr, uint32 data) override;
                     33: 
                     34:        // 拡張メモリ容量(バイト単位)を取得
                     35:        int GetSize() const     { return ram_size; }
                     36:        // 拡張メモリ容量(MB単位)を取得
                     37:        int GetSizeMB() const { return ram_size / 1024 / 1024; }
                     38: 
                     39:  private:
                     40:        inline uint32 Decoder(uint32) const;
                     41: 
                     42:        std::unique_ptr<uint8[]> ram {};
                     43: 
                     44:        // 拡張メモリの開始アドレス
                     45:        uint32 ram_addr {};
                     46: 
                     47:        // 拡張メモリ容量(バイト単位)。ram[] の確保したバイト数
                     48:        uint ram_size {};
                     49: };
                     50: 
                     51: static inline ExtRAMDevice *GetExtRAMDevice() {
                     52:        return Object::GetObject<ExtRAMDevice>(OBJ_EXTRAM);
                     53: }

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