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Annotation of nono/vm/subram.h, revision 1.1.1.3

1.1       root        1: //
                      2: // nono
                      3: // Copyright (C) 2020 nono project
                      4: // Licensed under nono-license.txt
                      5: //
                      6: 
                      7: //
                      8: // サブメモリ
                      9: //
                     10: 
                     11: #pragma once
                     12: 
                     13: #include "device.h"
                     14: 
                     15: // サブメモリ (基本クラス)
                     16: class SubRAMBaseDevice : public IODevice
                     17: {
                     18:        using inherited = IODevice;
                     19:  public:
1.1.1.3 ! root       20:        SubRAMBaseDevice(uint objid_, uint ramsize_kb);
1.1.1.2   root       21:        ~SubRAMBaseDevice() override;
1.1       root       22: 
                     23:        void ResetHard(bool poweron) override;
                     24: 
1.1.1.3 ! root       25:        busdata Read(busaddr addr) override;
        !            26:        busdata Write(busaddr addr, uint32 data) override;
        !            27:        busdata Peek1(uint32 addr) override;
        !            28:        bool Poke1(uint32 addr, uint32 data) override;
        !            29: 
        !            30:        // XP からのバイトアクセス
        !            31:        busdata Read1(uint32 addr) override;
        !            32:        busdata Write1(uint32 addr, uint32 data) override;
        !            33: 
        !            34:        // Lance からのワードアクセス (これは override ではない)
        !            35:        busdata Read2(uint32 addr);
        !            36:        busdata Write2(uint32 addr, uint32 data);
        !            37:        busdata Peek2(uint32 addr) const;
1.1       root       38: 
                     39:  private:
                     40:        // アドレスデコーダ
1.1.1.2   root       41:        uint32 Decoder(uint32 addr) const;
1.1       root       42: 
1.1.1.3 ! root       43:        // RAM 容量(バイト単位)を取得
        !            44:        uint GetSize() const { return mask + 1; }
        !            45: 
1.1       root       46:        std::unique_ptr<uint8[]> ram {};
1.1.1.3 ! root       47:        uint32 mask {};
1.1       root       48: };
                     49: 
                     50: // サブメモリ (XP/Lance との共有 RAM)
                     51: class SubRAMDevice : public SubRAMBaseDevice
                     52: {
                     53:        using inherited = SubRAMBaseDevice;
                     54:  public:
1.1.1.3 ! root       55:        explicit SubRAMDevice(uint ramsize_kb);
1.1       root       56:        ~SubRAMDevice() override;
                     57: 
                     58:        void ResetHard(bool poweron) override;
                     59: };
                     60: 
1.1.1.3 ! root       61: // サブメモリ 2 (XP の非共有部)
1.1       root       62: class SubRAM2Device : public SubRAMBaseDevice
                     63: {
                     64:        using inherited = SubRAMBaseDevice;
                     65:  public:
1.1.1.3 ! root       66:        explicit SubRAM2Device(uint ramsize_kb);
1.1       root       67:        ~SubRAM2Device() override;
                     68: };
                     69: 
                     70: static inline SubRAMDevice *GetSubRAMDevice() {
                     71:        return Object::GetObject<SubRAMDevice>(OBJ_SUBRAM);
                     72: }

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