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Annotation of nono/vm/tvram.h, revision 1.1.1.13

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: 
1.1.1.12  root       15: class VideoCtlrDevice;
1.1.1.9   root       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: 
1.1.1.11  root       21:        static const uint32 baseaddr = 0xe00000;
1.1       root       22: 
1.1.1.8   root       23:        // プレーン数は4枚固定
1.1.1.11  root       24:        static const uint NPLANE = 4;
1.1.1.8   root       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: 
1.1.1.11  root       40:        busdata Read(busaddr addr) override;
                     41:        busdata Write(busaddr addr, uint32 data) override;
                     42:        busdata Peek1(uint32 addr) override;
                     43:        bool Poke1(uint32 addr, uint32 data) override;
1.1.1.9   root       44: 
                     45:        void UpdateInfo(TextScreen&, int x, int y) const override;
1.1       root       46: 
1.1.1.8   root       47:        void SetAccessPlane(uint16 data);
                     48:        void SetAccessMask(uint16 data);
1.1.1.3   root       49:        void SetScrollX(int x);
                     50:        void SetScrollY(int y);
1.1.1.11  root       51:        void RasterCopy(uint src_ras, uint dst_ras);
1.1       root       52: 
                     53:  private:
1.1.1.2   root       54:        // アドレスデコーダ
1.1.1.10  root       55:        uint32 Decoder(uint32 addr) const;
1.1.1.2   root       56: 
1.1.1.11  root       57:        void Set8(uint32 offset, uint32 poffset, uint32 data, uint32 mask);
                     58:        void Set16(uint32 offset, uint32 poffset, uint32 data, uint32 mask);
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: 
1.1.1.12  root       66:        VideoCtlrDevice *videoctlr {};
1.1.1.13! root       67: 
        !            68:        static const busdata wait;
1.1       root       69: };
                     70: 
1.1.1.9   root       71: static inline TVRAMDevice *GetTVRAMDevice() {
                     72:        return Object::GetObject<TVRAMDevice>(OBJ_PLANEVRAM);
                     73: }

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