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