    //
    DefinitionBlock ("", "SSDT", 2, "OCLT", "EHCx_OFF", 0x00001000)
    {
        Scope (\)
        {
            OperationRegion (RCRG, SystemMemory, 0xFED1F418, One)
            Field (RCRG, DWordAcc, Lock, Preserve)
            {
                    ,   13,
                EH2D,   1,
                    ,   1,
                EH1D,   1
            }

            Method (_INI, 0, NotSerialized)
            {
                If (_OSI ("Darwin"))
                {
                    EH1D = One  // Disable EHC1
                }
            }
        }
    }

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