INT 10H 0eH: Write Character as TTY

                                                          Compatibility: All 
 Expects: AH    0eH
          AL    character to write
          BL    (graphics modes only) foreground color number
 Returns: (none)
    Info: Writes the specified character to the current cursor position and
          updates the cursor position.  When the cursor advances to the end
          of the last screen line, this scrolls the text up one line.

          This writes the character only.  It is displayed with whatever
          video attribute is currently at the cursor position.  Also, when
          the screen scrolls, it fills the next line with the current
          attribute of the lower-right corner of the screen.

          This function treats these characters specially:

           CR  (0dH) ─── cursor to start of next line
           LF  (0aH) ─── cursor to current clm on next lower line
           BEL (07H) ─── beep the speaker

          This is too slow for most apps.  See Video Memory Layouts.

See Also: INT 10H 13H (display a string of characters)
          INT 10H 09H (write a character and attribute)