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

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: 
1.1.1.4 ! root       23:        bool Init() override;
1.1       root       24:        void ResetHard(bool poweron) override;
                     25: 
1.1.1.3   root       26:        busdata Read(busaddr addr) override;
                     27:        busdata Write(busaddr addr, uint32 data) override;
                     28:        busdata Peek1(uint32 addr) override;
                     29:        bool Poke1(uint32 addr, uint32 data) override;
                     30: 
                     31:        // XP からのバイトアクセス
                     32:        busdata Read1(uint32 addr) override;
                     33:        busdata Write1(uint32 addr, uint32 data) override;
                     34: 
                     35:        // Lance からのワードアクセス (これは override ではない)
                     36:        busdata Read2(uint32 addr);
                     37:        busdata Write2(uint32 addr, uint32 data);
                     38:        busdata Peek2(uint32 addr) const;
1.1       root       39: 
                     40:  private:
                     41:        // アドレスデコーダ
1.1.1.2   root       42:        uint32 Decoder(uint32 addr) const;
1.1       root       43: 
1.1.1.3   root       44:        // RAM 容量(バイト単位)を取得
                     45:        uint GetSize() const { return mask + 1; }
                     46: 
1.1       root       47:        std::unique_ptr<uint8[]> ram {};
1.1.1.3   root       48:        uint32 mask {};
1.1       root       49: };
                     50: 
                     51: // サブメモリ (XP/Lance との共有 RAM)
                     52: class SubRAMDevice : public SubRAMBaseDevice
                     53: {
                     54:        using inherited = SubRAMBaseDevice;
                     55:  public:
1.1.1.3   root       56:        explicit SubRAMDevice(uint ramsize_kb);
1.1       root       57:        ~SubRAMDevice() override;
                     58: 
                     59:        void ResetHard(bool poweron) override;
                     60: };
                     61: 
1.1.1.3   root       62: // サブメモリ 2 (XP の非共有部)
1.1       root       63: class SubRAM2Device : public SubRAMBaseDevice
                     64: {
                     65:        using inherited = SubRAMBaseDevice;
                     66:  public:
1.1.1.3   root       67:        explicit SubRAM2Device(uint ramsize_kb);
1.1       root       68:        ~SubRAM2Device() override;
                     69: };
                     70: 
                     71: static inline SubRAMDevice *GetSubRAMDevice() {
                     72:        return Object::GetObject<SubRAMDevice>(OBJ_SUBRAM);
                     73: }

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