Re: [Emc-users] quick question on parallel port cables

[Peter C. Wallace]

On Fri, 6 Nov 2020, R C wrote:

Date: Fri, 6 Nov 2020 20:13:20 -0700
From: R C <cjv...@gmail.com>
Reply-To: "Enhanced Machine Controller (EMC)"
    <emc-users@lists.sourceforge.net>
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] quick question on parallel port cables

On 11/6/20 8:08 PM, andy pugh wrote:
On Sat, 7 Nov 2020 at 02:48, R C <cjv...@gmail.com> wrote:

You will need a cable that has ALL 25 pins connected (one to one),
that's called a straight through
It's a bit more than that, as some parallel cables only have enough
wires to work a printer, and leave some out.

that would not be a parallel straight through, you would need a db25 
straight through



You need an IEEE 1284 cable. (then buzz it through with a multimeter
when it arrives, and if it _isn't_ IEEE 1284 you have grounds for
return/refund.

Nah,  you just need a  db25 straight through...  or a   db25 extension 
cable,  which is the same thing.


Because of the high speed signals on a 7I77 interface, a IEEE-1284 cable is 
suggested as it has lower crosstalk and better ground integrity


Peter Wallace
Mesa Electronics

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