Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10 5/3/83; site intelca.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!genrad!decvax!decwrl!amd!intelca!cem
From: cem@intelca.UUCP (Chuck McManis)
Newsgroups: net.micro,net.micro.cbm
Subject: Re: RS422 to IEEE488 convert
Message-ID: <445@intelca.UUCP>
Date: Fri, 9-Nov-84 15:37:32 EST
Article-I.D.: intelca.445
Posted: Fri Nov  9 15:37:32 1984
Date-Received: Sat, 10-Nov-84 10:23:37 EST
References: <152@qumix.UUCP> <4584@utzoo.UUCP> <574@turtlevax.UUCP>
Organization: Intel, Santa Clara, Ca.
Lines: 17
Xref: genrad net.micro:9200 net.micro.cbm:935

If I am not mistaken the IEEE-488, aka the GPIB bus is parallel, whereas
the RS-232 port is serial. The RS-232 488 bus refers to an IEEE-488
bus with RS-232 signal levels (ie <-3V ,>+3V) whereas the RS-422 levels
refer to a differential signal (2 wires/signal line the voltage difference
is >+/- 3 V) An RS-422 serial to IEEE-488 parallel converter would 
probably involve a single chip microcomputer with a serial channel and
some parallel lines that was programmed to do the conversion. (an 8751
comes to mind :-) ) Then again I may have entirely misinterpreted the
question.


-- 
-- Chuck                                    - - - D I S C L A I M E R - - - 
{ihnp4,fortune}!dual\                     All opinions expressed herein are my
        {proper,idi}-> !intelca!cem       own and not those of my employer, my
 {ucbvax,hao}!hplabs/                     friends, or my avocado plant. :-}
                             ARPAnet    : "hplabs!intelca!cem"@Berkeley