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Annotation of nono/vm/tvram.h, revision 1.1.1.10

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();
1.1.1.10! root       36:        ~TVRAMDevice() override;
1.1       root       37: 
1.1.1.8   root       38:        bool Init() override;
1.1       root       39: 
1.1.1.10! root       40:        busdata Read8(uint32 addr) override;
        !            41:        busdata Read16(uint32 addr) override;
        !            42:        busdata Write8(uint32 addr, uint32 data) override;
        !            43:        busdata Write16(uint32 addr, uint32 data) override;
        !            44:        busdata Peek8(uint32 addr) override;
        !            45:        bool Poke8(uint32 addr, uint32 data) override;
1.1.1.9   root       46: 
                     47:        void UpdateInfo(TextScreen&, int x, int y) const override;
1.1       root       48: 
1.1.1.8   root       49:        void SetAccessPlane(uint16 data);
                     50:        void SetAccessMask(uint16 data);
1.1.1.3   root       51:        void SetScrollX(int x);
                     52:        void SetScrollY(int y);
1.1.1.8   root       53:        void RasterCopy(int src_ras, int dst_ras);
1.1       root       54: 
                     55:  private:
1.1.1.2   root       56:        // アドレスデコーダ
1.1.1.10! root       57:        uint32 Decoder(uint32 addr) const;
1.1.1.2   root       58: 
1.1.1.8   root       59:        inline void SetDirty(uint32 offset);
1.1       root       60: 
1.1.1.9   root       61:        // 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。
                     62:        int GetWrapY(int y) const override;
                     63: 
1.1       root       64:        struct tvram tvram {};
1.1.1.9   root       65: 
                     66:        Renderer *renderer {};
1.1       root       67: };
                     68: 
1.1.1.9   root       69: static inline TVRAMDevice *GetTVRAMDevice() {
                     70:        return Object::GetObject<TVRAMDevice>(OBJ_PLANEVRAM);
                     71: }

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