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Annotation of nono/vm/nop.h, revision 1.1

1.1     ! root        1: //
        !             2: // nono
        !             3: // Copyright (C) 2020 nono project
        !             4: // Licensed under nono-license.txt
        !             5: //
        !             6: 
        !             7: //
        !             8: // 何もしないデバイス
        !             9: //
        !            10: 
        !            11: #pragma once
        !            12: 
        !            13: #include "device.h"
        !            14: 
        !            15: // 何もしないデバイス。
        !            16: // 読み込むと全域で 0xff が読めて、書き込んでも何も起きない。
        !            17: class NopIODevice : public IODevice
        !            18: {
        !            19:        using inherited = IODevice;
        !            20:  public:
        !            21:        NopIODevice();
        !            22:        ~NopIODevice() override;
        !            23: 
        !            24:        busdata Read(busaddr addr) override;
        !            25:        busdata Write(busaddr addr, uint32 data) override;
        !            26:        busdata Read1(uint32 addr) override;
        !            27:        busdata Write1(uint32 addr, uint32 data) override;
        !            28:        busdata Peek1(uint32 addr) override;
        !            29: };
        !            30: 
        !            31: static inline NopIODevice *GetNopIODevice() {
        !            32:        return Object::GetObject<NopIODevice>(OBJ_NOPIO);
        !            33: }

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