I looked with effort on the Web for "da schematic" for the motor controller, the thing that was "jumpered" in posted discussion. I was surprised to NOT find it. There's info on the Apple II interface card already, as discussed.
I spent a couple of years looking. When I said it's not online, that was a fact not speculation. :) The blog you linked to is useful and I've corresponded with the author a few times. You will see comments there from a couple of years ago from me and from Dan Roganti. My main issue with Lukazi's blog is he explains the tech itself but not how to use it. To me that spelled opportunity, which is why I built my own site (http://www.mindsbeforethestorm.com). When Neville or someone else makes the schematic (Glitch didn't have time) after the Brickfair event in November, then I will post it and share it widely in the vintage computing community and in the AFOL ("Adult Fans Of Lego") community too. On Mon, Sep 30, 2019, 4:59 PM Herb Johnson via vcf-midatlantic < vcf-midatlantic@lists.vcfed.org> wrote:
http://www.retrotechnology.com/restore/vcfrepair_sep19.html
I was going to post about my PDP-8/A repairs at the recent workshop; the linked WEb page has details. When I read Evan's post about his LEGO Logo Robo go-go work, I added some photos and links about that, to my Web page.
I looked with effort on the Web for "da schematic" for the motor controller, the thing that was "jumpered" in posted discussion. I was surprised to NOT find it. There's info on the Apple II interface card already, as discussed. Odd someone with skills, hasn't drawn this already. There's the usual reasons, mostly like these things are already available for tens of dollars used.
Ah - this Web page is informative:
http://lukazi.blogspot.com/2014/07/lego-legos-first-programmable-product.htm...
Regards, Herb "copper trace" Johnson
-- Herbert R. Johnson, New Jersey in the USA http://www.retrotechnology.com OR .net preserve, recover, restore 1970's computing email: hjohnson AT retrotechnology DOT com or try later herbjohnson AT retrotechnology DOT info