Re: can rPi drive PC-bidirectional Par-port?

From	Michael Black <et472@ncf.ca>
Newsgroups	comp.os.linux.hardware, comp.sys.raspberry-pi
Subject	Re: can rPi drive PC-bidirectional Par-port?
Date	2013-04-08 01:43 -0400
Organization	National Capital Freenet, Ottawa, Ontario, Canada
Message-ID	<alpine.LNX.2.02.1304080140580.7771@darkstar.example.org> (permalink)
References	<kjlvsl$o5l$1@dont-email.me> <vg3ppy9qepo.fsf@coffee.modeemi.fi> <kjsbkh$5ie$1@dont-email.me> <slrnkm3e53.kf0.nomail@xs8.xs4all.nl>

Cross-posted to 2 groups.

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On Sun, 7 Apr 2013, Rob wrote:

> Unknown <dog@gmail.com> wrote:
>> On Fri, 05 Apr 2013 16:39:15 +0300, Anssi Saari wrote:
>>
>>> Avoid9Pdf@gmail.com writes:
>>>
>>>> Since eg. IOMEGA par-port assumed at least a 4bit-wide
>>>> bidirectionality, perphaps all post-70's were bidirectional?
>>>
>>> The PC printer ports were bidirectional at least in the sense that they
>>> had five status inputs which could be used as data inputs. Even the
>>> control outputs could be fairly easily used as inputs which meant a
>>> total 9 input pins.
>>>
>>> Bidirectional ports have a control bit to set the data pins to inputs or
>>> outputs or to be exact, eanble or disable the output drivers.
>>>
>>> So, probably you can talk to a PC parallel port but I'd rather use
>>> ethernet or serial (RS-232) for PC communication.
>>
>> Yes but, I want to interface to the most primitive PCs.
>> Ethernet is a higher level of complication.
>> And IIRC RS232 won't interface with rPi's 3.3V [MOS ?],
>> but par-port will.
>
> You primitive PCs will likely have a 5V par port?
> Maybe not so bad when it is still TTL, but when it is MOS...?
>
He has to define "primitive".  That Sun 3/50 someone gave me has ethernet, 
but Macs of that vintage didn't.  It was't until relatively recent times 
that ethernet becamse common (after things like ARCnet), but I think you 
can go back 20 years and while ethernet wasn't standard, there were cards 
for the ISA bus in the "IBM PC".  Of course, you'd need an operating 
system that would make use of the ethernet card.

    Michael


> For RS232 you can put a MAX-3222 or MAX-3232 inbetween.
>

Thread

can rPi drive PC-bidirectional Par-port? Avoid9Pdf@gmail.com - 2013-04-05 07:52 +0000
  Re: can rPi drive PC-bidirectional Par-port? Johann Klammer <klammerj@NOSPAM.a1.net> - 2013-04-05 12:12 +0200
  Re: can rPi drive PC-bidirectional Par-port? Anssi Saari <as@sci.fi> - 2013-04-05 16:39 +0300
    Re: can rPi drive PC-bidirectional Par-port? Unknown <dog@gmail.com> - 2013-04-07 17:50 +0000
      Re: can rPi drive PC-bidirectional Par-port? Rob <nomail@example.com> - 2013-04-07 18:19 +0000
        Re: can rPi drive PC-bidirectional Par-port? Michael Black <et472@ncf.ca> - 2013-04-08 01:43 -0400
          Re: can rPi drive PC-bidirectional Par-port? The Natural Philosopher <tnp@invalid.invalid> - 2013-04-08 10:21 +0100
            Re: can rPi drive PC-bidirectional Par-port? Rob Morley <nospam@ntlworld.com> - 2013-04-08 15:19 +0100
              Re: can rPi drive PC-bidirectional Par-port? The Natural Philosopher <tnp@invalid.invalid> - 2013-04-08 17:26 +0100
              Re: can rPi drive PC-bidirectional Par-port? "Stanley Daniel de Liver" <admin@127.0.0.1> - 2013-04-14 15:00 +0100
                Re: can rPi drive PC-bidirectional Par-port? Huge <Huge@nowhere.much.invalid> - 2013-04-14 14:25 +0000
  Re: can rPi drive PC-bidirectional Par-port? David <no@spam.please> - 2013-04-08 02:01 +0000
    Re: can rPi drive PC-bidirectional Par-port? Michael Black <et472@ncf.ca> - 2013-04-08 01:40 -0400

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