Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!usc!samsung!umich!caen.engin.umich.edu!pmc
From: pmc@caen.engin.umich.edu (Paul S McClay)
Newsgroups: comp.sys.handhelds
Subject: 48sx serial voltage levels
Keywords: 48sx serial flintstones
Message-ID: <4927f2ed.bfe8@tachyon.engin.umich.edu>
Date: 12 Mar 90 05:00:00 GMT
Organization: U of M Engineering, Ann Arbor, Mich.
Lines: 10

It is my understanding that RS232 signal levels are +/-12Volts. Does the
48sx opperate at these levels, or does the HP interface kit do level
conversion?

I am surprised that 3 AAA batteries contain the juice to run an RS232
port for more than a week, but nobody has mentioned any special
attributes of the interface cable...

If you haven't guessed, I want to make a cable, but am afraid of frying
an $n10^2 calculator.