Function 6602h          Set Global Code Page                         DOS 3.3+

    Sets the code page used by all programs.

        Entry   AX = 6602h
                BX = Global code page

        Return  AX = Error code, if CF is set
                     | 02h File not found

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    Before a code page can be selected for use on a device, the device
    must be prepared for code-page switching. The selected code page
    must be compatible with the country code specified in CONFIG.SYS.
    DOS returns an error value of 2 (file not found) if it cannot read
    the COUNTRY.SYS file or another specified country-information
    file.