INT 62 u - FGDRIVER v3.03 - "FG_GETMAXX" - GET MAXIMUM COLUMN IN SCREEN SPACE
        AX = 003Dh
Return: AX = maximum X coordinate in screen space
                (or character space if in text mode)
Note:   For FGDRIVER v1.10, this function was "FG_SETPAGE" (see AX=0095h);
           "FG_GETMAXX" was AX=000Ah
SeeAlso: AX=003Eh,AX=00A1h

.