Compatibility: EGA VGA
Expects: AX    1122H
BL    screen rows code: 00H = user-specified (in DL)
01H = 14 rows
02H = 25 rows
03H = 43 rows
DL    (when BL=0) custom number of character rows on screen
Returns: (none)
Info: Sets up to use the ROM-defined 8x14 characters when the BIOS
displays text while in graphics modes.  This sets the INT 43H
vector and sets BIOS variables needed to use the font.

- -

INT 10H 1122H: Setup ROM 8x14 Font for Graphics Mode