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From: dcaffey@hydra.unm.edu (Dom Caffey CIRT-APSYS)
Newsgroups: comp.sys.mac,comp.sys.mac.hardware,comp.sys.mac.misc,comp.sys.mac.system
Subject: MAC<----->rs232<----->MS-DOS world -- Thanks for advice!
Message-ID: <1990Jul13.062527.12864@ariel.unm.edu>
Date: 13 Jul 90 06:25:27 GMT
Sender: usenet@ariel.unm.edu (USENET News System)
Organization: University of New Mexico, Albuquerque
Lines: 38

Awhile ago I posted the following letter:


>To someone with technical knowledge about macs:
> >>
>> 	I'm trying to get a mac-512+ to talk to an MS-DOS machine 
> (Zenith MinisPort) via the mac's modem port and the zenith's 9 pin
> rs232.  I've got the pinouts for both ports but don't have signal
> line voltage levels for either.  What I need to know is what the voltage
> line levels are for both machines or either one if info can only be
> provided on one machine.  I've heard that the higher voltage signal
> line levels coming off the rs232 port of the zenith won't hurt the
> mac but I can't go on heresay or rumors because if I was wrong, the 
> cost of the mistake would be too much.  If anyone has some good,
> sound technical advice on this subject, I'd appreciate hearing from
> you via direct email to me.  
> 
> 
> Thanks in advance,
> 
> Dominic Caffey
> 
> p.s.:  I talked to the local Apple store here in town and with 
	> Computerland and neither was of much help.

The sole purpose of this 2nd letter is simply to thank all those who responded
to my query.  THANKS!! I got a lot of good advice and successfully built
the cable.

Appreciatively,

Dominic Caffey

--
+-------------------------------+
| Dominic Caffey,               |
| Student, Ph#:  (505)-296-1942 |
| University of New Mexico, USA |