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  Description:  Get Extended Country Information     DOS 3.3 Only
 
  Obtains information about the specified country and/or code page.
 
  Input                                               Output
  ════════════════════════════════════════            ════════════════════
  AH=65H                                              If function success-
  AL=subfunction                                       ful
     01H=Get General Internationalization             Carry flag=clear
      Information                                     and requested data
     02H=Get Pointer to Uppercase Table                placed in calling
     04H=Get Pointer to Filename Uppercase             program's buffer
      Table                                           If function unsuc-
     06H=Get Pointer to Collating Table                cessful
     07H=Get Pointer to DBCS Vector (MS-DOS           Carry flag=set
      versions 4.0 and later)                         AX=error code
  BX=code page of interest (-1 = active CON
   device)
  CX=length of buffer to receive information
  DX=country ID (-1 = default)
  ES:DI=address of buffer to receive informa-
   tion
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