Re: Re Cables (part 2)

[Robert Patterson]

My reply follows quote.

(Don wrote:)
>Which brings me back to one part of my original question...
>
  [snip!]
>So...again I ask has anyone here ever done the splice on the normal
>cable to complete the set up through the switch box...regardless if
>that changes it from straight to crossover, or crossover to strait?
>I 'presume' such a splicing would be easily done by reversing two
>of the normal printer cable wires.
>
>All I'd need is to know "which" two.  If all else fails, I'll have
>to get out a meter, and go at it sorta blind till I figure out which
>ones are right.
>
>Thanks for all the good feedback so far.
>Don


Don,

Actually, 3 signals have to be "cross-connected".  And yes, I've done
this splice. :-)

If you look into the open end of a mini-DIN8 male plug (not the "solder" side)
the pin designation is as follows:

 6 7 8

3 4   5

 1  2



Here is the way a standard Mac printer cable is wired:

One endOther end

1 HSKo --> HSKi 2
2 HSKi <-- HSKo 1
3 TxD- --> RxD- 5
4 Grnd --- Grnd 4
5 RxD- <-- TxD- 3
6 TxD+ --> RxD+ 8
7 GPi  --- Gpi  7
8 RxD+ <-- TxD+ 6


As you can see (I hope! ASCII art was not one of my strong points :-)
pins 1, 3 and 6 are crossed to pins 2, 5 and 8 respectively.


Hope this helps!

Rob

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Re Cables (part 2)

[Don]

>
>Referring to Re: Cables, at  18:33 -0500, 3/7/03,   (Robert 
>Patterson) eloquently  elucidated:
>
>>  You are correct.  A special "straight-through" cable to the switchbox, and
>>  regular Mac printer cables from the box to each printer.  That is what has
>>  always worked in my experience.
>>
>>  Note that many switchboxes made for Macs INCLUDED this special cable, which
>>  unfortunately was often not marked as a special cable, which caused a great
>>  deal of confusion from the outset.  :-(
>
>and where could one get such a wonderful device?
>
>-- 
>Thanks,
>Paul ([EMAIL PROTECTED])

Which brings me back to one part of my original question...

>
>Is there an EASY way to take a regular ADB printer cable and
>simply splice it and rewire it properly to make it work instead
>of the 'right' cable?

Since there seems to be confusion about one part of my question,
(maybe I used wrong terminology?) I am using a stylewriter 1500
printer.  That particular printer does not connect into the scsi
chain like some of the others (at least one laser writer that I
know of) does.

I am not certain that I used proper terminology in the above
identifying of the correct cable, but I do know there are two
different cables needed to be used when going through the switch
box as has been mentioned by several people.

So...again I ask has anyone here ever done the splice on the normal
cable to complete the set up through the switch box...regardless if
that changes it from straight to crossover, or crossover to strait?
I 'presume' such a splicing would be easily done by reversing two
of the normal printer cable wires.

All I'd need is to know "which" two.  If all else fails, I'll have
to get out a meter, and go at it sorta blind till I figure out which
ones are right.

Thanks for all the good feedback so far.
Don

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