Int 10 Fn 0E  - Video - Teletype Output                                    [V]

   AH = 0Eh
   AL = character to write
   BH = page number
   BL = foreground color (graphics modes only)

Return: nothing
Desc:  display a character on the screen, advancing the cursor and scrolling
     the screen as necessary

Notes: characters 07h (BEL), 08h (BS), 0Ah (LF), and 0Dh (CR) are interpreted
     and do the expected things
   IBM PC ROMs dated 4/24/81 and 10/19/81 require that BH be the same as
     the current active page
BUG:   if the write causes the screen to scroll, BP is destroyed by BIOSes
     for which AH=06h destroys BP

See Also: AH=02h,AH=06h,AH=0Ah