Gene, You could use one of the MAX232 chips by Maxim
(others, such as
analog devices make this too)
Pretty cool family of chips - takes a logic level and translates to _+
RS232 levels, using a single 5 or 3.3v supply and a internal charge
pump. Only required external parts are the .1 uf charge pump caps...
They are neat, but this is for repairing a 1985 vintage CP/M machine. :)
g.
--
Proud owner of F-15C 80-0007
http://www.f15sim.com - The only one of its kind.