On 3/13/20 5:15 AM, James Zeun wrote:
Well of course I knew I could buy a £4 cable and save myself half an
hour soldering 40 wires, well 80! What do you take me for some sort of
idiot? *Cough* :-P
There's always someone with a bright idea. Well I'm going to make coffee
and try to not feel too disappointed about all that soldering I'm
missing out on, now I have a 30cm extension cable ordered.
*Goes off grumbling to himself*
Thanks Brian! ;-)
Someone else said splice you didn't, but in this same conversation, so I
just addressed it all in one post.
Are you *sure* you don't want to perform 80 solder and heat-shrink
splices? It can be very zen. :)
--
bkw
On Fri, 13 Mar 2020, 5:34 am Brian White, <b.kenyo...@gmail.com
<mailto:b.kenyo...@gmail.com>> wrote:
It's easier than that. If you take pretty much any idc connector and
put it back to back or hed yo head with another, the end result is
the "twist" where pin 1 switches places with pin 40, pin 2 switches
places with pin 39, etc.
What I mean by "any idc" is, for instance, a wire-to-board back to
back with a male pin header. That makes a Model 102 or 200 cable.
http://tandy.wiki/Disk/Video_Interface:_Cable#Cable_supporting_models_102_and_200_only
Another form of the same thing is if you put 2 male pin headers back
to back, that makes an adapter that can serve as the the twisty part
on a cable set that works on all 3 models.
http://tandy.wiki/Disk/Video_Interface:_Cable
Or head to head: Mike Stein showed me (well everyone) that if you
just take any standard 40 pin cables and butt two female ends face
to face with a "gender changer" pin header, that results in the same
twist.
That page above has links to buy all the odd parts for the different
ways to do it.
But for a pcb to do the switcheroo, the pcb is nothing more than 40
straight lines just to make it easier to solder two plugs back to
back. See the "twist adapter" link in that page.
You don't have to splice anything to make the cable longer. Just buy
or make a bog-standard 40 pin male-female extension cable, and stick
it on the DVI end of the cable. They are readily available pre-made
and cheap these days in the form of "gpio" cables for arduino or
raspberry pi.
You can search "male female gpio" or similar on ebay or just pick a
length here:
http://www.cablesonline.com/240pinidedir.html
--
bkw
On Thu, Mar 12, 2020, 5:33 PM RETRO Innovations
<go4re...@go4retro.com <mailto:go4re...@go4retro.com>> wrote:
On 3/12/2020 4:17 PM, Mike Stein wrote:
Hi Jim,
I wouldn't call it a newbie mistake ;-) Those 'non-standard'
40-pin DIP headers have been impossible to find; maybe with
your resources you can find some somewhere so they can just
simply be crimped on.
I'm wondering if the switch could be made at the other end, with
a small PCB and the respective female header attached to it...
--
bkw
