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! ;-) On Fri, 13 Mar 2020, 5:34 am Brian White, <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> > 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... >> >>
