Here's a photo of my first computer I'm offering as an introduction. It's actually a TS-1000+Zxpand+, not a ZX-1881
Don't mind the fake throw switch on the right, I'll replace it with a real blade switch to control the inverse video as soon as I can find it in my piles of junk.
Hope you like it! Oh btw don't freak out vintage lovers, the original case & keyboards are totally unharmed.
- Posts: 2892
- Joined: Mon Sep 26, 2011 10:56 am
- Location: Looking forward to summer in Somerset, UK...
Do you plan to pimp also the memory by using ferrite core memory ?
Try to use 2x 512 bytes ferrite core memory module as used in an old CDC 6600 to remplace the 1ko buid-in memory of the ZX ?
No that's far too modern, mercury delay line for the win!
Thanks for the welcome & good words, it's great to get some positive feedback when most of the world doesn't "get it".
Regarding the RAM, I was thinking of using some of Babbage's mechanical designs but since he died in 1871 I thought I should use something more modern, like iself-sustaining steam switches. I just don't know where I will store the coal safely, my Zeddy's shell is wood, after all.
I HAVE gone completely overboard with the internal RAM chip, I even put a copper heat sink on it, even though it is never used because of the ZXPand+.
Don't mind the horrible wiring, I'm still deciding where to place things. That fan on the ULA makes this the loudest Sinclair in existence, thankfully I can switch it off or replace it with something much bigger and it will still fit in the case.
I have 3 TS1000's here so I have plenty of opportunity to experiment but I think I may have killed one of them running it without any cooling. We'll see when I'm done with this ZX-1881, I definitely want my next Zeddy to be a "Sleeper" upgrade and a fan on the bottom would give it away imho.
Also my guess is you could run the fan at much lower voltage (and more silently) if you can put the cool air precisely where it's needed.
Anyway, must add that to one of my to-do lists.