HelpPC 2.10	Quick Reference Utility	Copyright 1991 David Jurgens
INT 29 - DOS Fast Character I/O  (Undocumented 2.x+)        AL = character to write        returns nothing ???        - used by DOS device drivers to output data to the screen if          bit 4 of the device attribute word is set        - similar to INT 21,2 and INT 21,9 but much faster        - simply calls the BIOS INT 10,E in DOS versions 2.x and 3.x        - advances the cursor after character output
Esc or Alt-X to exit	int 29	Home/PgUp/PgDn/End ←↑↓→