X-Hacker.org- Ralf Brown's Interrupt List (Part 1,2) - format of second alphanumeric character set override:

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Format of Second Alphanumeric Character Set Override:
Authorities differ, some say same as first override above, but IBM say:
Offset  Size    Description
 00h    BYTE    Length in bytes of each character in font table
 01h    BYTE    Character generator RAM bank to load, normally non-zero
 02h    BYTE    reserved
 03h    DWORD   ptr to font table
 07h    BYTEs   Array of mode values to which this font is to pertain
        BYTE    FFh end of array

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