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

1.1       root        1: //
                      2: // nono
                      3: // Copyright (C) 2020 nono project
                      4: // Licensed under nono-license.txt
                      5: //
                      6: 
1.1.1.4   root        7: //
                      8: // OPM (YM2151)
                      9: //
                     10: 
1.1       root       11: #pragma once
                     12: 
                     13: #include "device.h"
                     14: 
1.1.1.6   root       15: class ADPCMDevice;
                     16: class FDCDevice;
                     17: 
1.1.1.3   root       18: class OPMDevice : public IODevice
1.1       root       19: {
                     20:        using inherited = IODevice;
1.1.1.4   root       21: 
1.1.1.8   root       22:        static const uint32 baseaddr = 0xe90000;
1.1.1.5   root       23:        static const uint64 clk = 250_nsec;             // 4MHz
1.1       root       24: 
                     25:  public:
                     26:        OPMDevice();
1.1.1.7   root       27:        ~OPMDevice() override;
1.1       root       28: 
1.1.1.6   root       29:        bool Init() override;
1.1.1.5   root       30:        void ResetHard(bool poweron) override;
                     31: 
1.1       root       32:  protected:
                     33:        // BusIO インタフェース
                     34:        static const uint32 NPORT = 2;
1.1.1.8   root       35:        busdata ReadPort(uint32 offset);
                     36:        busdata WritePort(uint32 offset, uint32 data);
                     37:        busdata PeekPort(uint32 offset);
                     38:        bool PokePort(uint32 offset, uint32 data);
1.1.1.4   root       39: 
                     40:  private:
1.1.1.5   root       41:        bool IsBusy() const;
                     42: 
1.1.1.4   root       43:        int reg {};             // アクセスレジスタ番号
1.1.1.5   root       44: 
1.1.1.9   root       45:        uint64 busy_origin {};  // BUSY の起点時刻
                     46:        uint64 busy_start {};   // BUSY のアサート開始時刻
                     47:        uint64 busy_end {};             // BUSY のアサート終了時刻
1.1       root       48: 
1.1.1.6   root       49:        ADPCMDevice *adpcm {};
                     50:        FDCDevice *fdc {};
                     51: };

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