DOS Fn 6501H: Get Extended Country Information

                                                         Compatibility: 3.3+ 
 Expects: AX    6501H
          BX    Code Page (0ffffH = current code page for console)
          CX    size of data to return (>=29H to get all of the data)
          DX    Country ID
          ES:DI address of buffer to receive an ExtCountryInfoRec
 Returns: AX    error code if CF is set to CY
          ES:DI buffer is filled with return information
    Info: Returns country-dependant information, including time and date
          format, currency symbol, etc.

          See ExtCountryInfoRec for a layout of the returned information.

   Notes: ■ The buffer size value in CX must be at least 5.  If it's less
            than the size of an ExtCountryInfoRec, then only part of the
            structure is filled.

          ■ Fn 38H also returns country-specific information in a somewhat
            different format.

See Also: National Language Support
          DOS Functions