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

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"
1.1.1.5   root       14: #include "event.h"
1.1       root       15: 
1.1.1.6   root       16: class ADPCMDevice;
                     17: class FDCDevice;
                     18: 
1.1.1.3   root       19: class OPMDevice : public IODevice
1.1       root       20: {
                     21:        using inherited = IODevice;
1.1.1.4   root       22: 
1.1.1.8   root       23:        static const uint32 baseaddr = 0xe90000;
1.1.1.5   root       24:        static const uint64 clk = 250_nsec;             // 4MHz
1.1       root       25: 
                     26:  public:
                     27:        OPMDevice();
1.1.1.7   root       28:        ~OPMDevice() override;
1.1       root       29: 
1.1.1.6   root       30:        bool Init() override;
1.1.1.5   root       31:        void ResetHard(bool poweron) override;
                     32: 
1.1       root       33:  protected:
                     34:        // BusIO インタフェース
                     35:        static const uint32 NPORT = 2;
1.1.1.8   root       36:        busdata ReadPort(uint32 offset);
                     37:        busdata WritePort(uint32 offset, uint32 data);
                     38:        busdata PeekPort(uint32 offset);
                     39:        bool PokePort(uint32 offset, uint32 data);
1.1.1.4   root       40: 
                     41:  private:
1.1.1.5   root       42:        bool IsBusy() const;
                     43: 
1.1.1.4   root       44:        int reg {};             // アクセスレジスタ番号
1.1.1.5   root       45: 
1.1.1.9 ! root       46:        uint64 busy_origin {};  // BUSY の起点時刻
        !            47:        uint64 busy_start {};   // BUSY のアサート開始時刻
        !            48:        uint64 busy_end {};             // BUSY のアサート終了時刻
1.1       root       49: 
1.1.1.6   root       50:        ADPCMDevice *adpcm {};
                     51:        FDCDevice *fdc {};
                     52: };

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