38H   set or query country info       Country ID Codes (dates, money, etc.)
6501H query extended country info

6504H get uppercase table
6505H get filename uppercase table
6506H get collating sequence table
6507H get double-byte character set info

6520H upshift character
6521H upshift text
6522H upshift ASCIIZ string

6601H query active code page          Code Page  overview and ID list
6602H activate code page              Code Page Font Files .CPI file layout
DEVICE= install DISPLAY.SYS or PRINTER.SYS code page support
INT 2fH adxxH Keyb services
INT 2fH b000H is Graftabl installed?
                                          Character device IOCTL functions  
440cH 4aH select a prepared code page

440cH 4cH begin preparing a code page
4403H     send control data to char device
440cH 4dH done preparing a code page

440cH 6aH query active code page
440cH 6bH get prepared code page list

440cH 5fH set display info
440cH 7fH query display info

National Language Support Functions