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Annotation of nono/vm/tvram.h, revision 1.1.1.9

1.1       root        1: //
                      2: // nono
1.1.1.3   root        3: // Copyright (C) 2020 nono project
                      4: // Licensed under nono-license.txt
1.1       root        5: //
                      6: 
1.1.1.8   root        7: //
                      8: // TVRAM
                      9: //
                     10: 
1.1       root       11: #pragma once
                     12: 
1.1.1.8   root       13: #include "planevram.h"
1.1       root       14: 
1.1.1.9 ! root       15: class Renderer;
        !            16: 
1.1.1.8   root       17: class TVRAMDevice : public PlaneVRAMDevice
1.1       root       18: {
1.1.1.8   root       19:        using inherited = PlaneVRAMDevice;
                     20: 
1.1       root       21:        static const int baseaddr = 0xe00000;
                     22: 
1.1.1.8   root       23:        // プレーン数は4枚固定
                     24:        static const int NPLANE = 4;
                     25: 
1.1       root       26:        struct tvram {
                     27:                bool sa;                                // 同時アクセス
1.1.1.8   root       28:                bool ap[NPLANE];                // 同時アクセスプレーン
                     29:                bool cp[NPLANE];                // ラスターコピー対象
                     30:                bool men;                               // アクセスマスクイネーブル
                     31:                uint16 mask;                    // アクセスマスク
1.1       root       32:        };
                     33: 
                     34:  public:
                     35:        TVRAMDevice();
1.1.1.6   root       36:        virtual ~TVRAMDevice() override;
1.1       root       37: 
1.1.1.8   root       38:        bool Init() override;
                     39:        void ResetHard(bool poweron) override;
1.1       root       40: 
1.1.1.3   root       41:        uint64 Read8(uint32 addr) override;
                     42:        uint64 Read16(uint32 addr) override;
                     43:        uint64 Write8(uint32 addr, uint32 data) override;
                     44:        uint64 Write16(uint32 addr, uint32 data) override;
                     45:        uint64 Peek8(uint32 addr) override;
1.1.1.9 ! root       46:        uint64 Poke8(uint32 addr, uint32 data) override;
        !            47: 
        !            48:        void UpdateInfo(TextScreen&, int x, int y) const override;
1.1       root       49: 
1.1.1.8   root       50:        void SetAccessPlane(uint16 data);
                     51:        void SetAccessMask(uint16 data);
1.1.1.3   root       52:        void SetScrollX(int x);
                     53:        void SetScrollY(int y);
1.1.1.8   root       54:        void RasterCopy(int src_ras, int dst_ras);
1.1       root       55: 
                     56:  private:
1.1.1.2   root       57:        // アドレスデコーダ
                     58:        uint64 Decoder(uint32 addr) const;
                     59: 
1.1.1.8   root       60:        inline void SetDirty(uint32 offset);
1.1       root       61: 
1.1.1.9 ! root       62:        // X 方向にはみ出したときに対応する仮想画面の Y 座標を返す。
        !            63:        int GetWrapY(int y) const override;
        !            64: 
1.1       root       65:        struct tvram tvram {};
1.1.1.9 ! root       66: 
        !            67:        Renderer *renderer {};
1.1       root       68: };
                     69: 
1.1.1.9 ! root       70: static inline TVRAMDevice *GetTVRAMDevice() {
        !            71:        return Object::GetObject<TVRAMDevice>(OBJ_PLANEVRAM);
        !            72: }

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