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Annotation of nono/vm/pedec.h, revision 1.1.1.8

1.1       root        1: //
                      2: // nono
                      3: // Copyright (C) 2020 nono project
                      4: // Licensed under nono-license.txt
                      5: //
                      6: 
1.1.1.6   root        7: //
                      8: // PEDEC
                      9: //
                     10: 
1.1       root       11: #pragma once
                     12: 
                     13: #include "device.h"
                     14: #include "interrupt.h"
                     15: 
1.1.1.7   root       16: class FDCDevice;
                     17: class SPCDevice;
                     18: 
1.1.1.4   root       19: class PEDECDevice : public InterruptDevice
1.1       root       20: {
                     21:        using inherited = InterruptDevice;
1.1.1.6   root       22: 
1.1       root       23:        static const int baseaddr = 0xe9c000;
                     24: 
                     25:  public:
1.1.1.5   root       26:        // intmap が下位デバイスからの割り込み信号線 (%1 でアサート)。
                     27:        // intmap_enabled がマスク (%1 なら割り込み許可)。
1.1.1.2   root       28:        // よって二者を AND とれば上位に割り込みを上げるかどうかが求まる。
1.1.1.5   root       29:        // SPC からの割り込みはここでマスク制御しないので intmap_enabled には
1.1.1.2   root       30:        // IntmapSPC を常に立てておくこと。
1.1.1.5   root       31:        static const uint32 IntmapSPC = 0x0100;
                     32:        static const uint32 IntmapFDC = 0x0080;
                     33:        static const uint32 IntmapFDD = 0x0040;
                     34:        static const uint32 IntmapHDD = 0x0020;
                     35:        static const uint32 IntmapPRT = 0x0010;
1.1.1.2   root       36: 
                     37:  public:
1.1       root       38:        PEDECDevice();
                     39:        virtual ~PEDECDevice() override;
                     40: 
1.1.1.7   root       41:        bool Init() override;
1.1.1.6   root       42:        void ResetHard(bool poweron) override;
1.1       root       43: 
                     44:        // InterruptDevice インタフェース
                     45:        int InterruptAcknowledge(int lv) override;
                     46: 
1.1.1.5   root       47:        // 割り込みコントローラからのモニタ表示
                     48:        void MonitorUpdate(TextScreen& screen, uint intr_level, int y);
1.1.1.2   root       49: 
1.1       root       50:  protected:
                     51:        // BusIO インタフェース
                     52:        static const uint32 NPORT = 8;
1.1.1.3   root       53:        uint64 Read(uint32 offset);
                     54:        uint64 Write(uint32 offset, uint32 data);
                     55:        uint64 Peek(uint32 offset);
1.1       root       56: 
                     57:  private:
1.1.1.8 ! root       58:        uint32 GetIntmap(const Device *source) const override;
1.1.1.5   root       59: 
1.1       root       60:        // 割り込みステータスレジスタの値を取得
                     61:        uint32 GetStat() const;
                     62: 
                     63:        // 割り込み信号線の状態を変える
1.1.1.5   root       64:        void ChangeInterrupt() override;
1.1       root       65: 
1.1.1.5   root       66:        uint32 intmap_enabled {};
1.1       root       67:        uint8 vector {};
1.1.1.7   root       68: 
                     69:        FDCDevice *fdc {};
                     70:        InterruptDevice *interrupt {};
                     71:        SPCDevice *spc {};
1.1       root       72: };
                     73: 
1.1.1.7   root       74: static inline PEDECDevice *GetPEDECDevice() {
                     75:        return Object::GetObject<PEDECDevice>(OBJ_PEDEC);
                     76: }

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