Search found 2771 matches

by Dave
Sat Mar 11, 2023 5:03 pm
Forum: Compatibles Corner
Topic: Sandy Keyboard Interface, appeal
Replies: 22
Views: 15704

Re: Sandy Keyboard Interface, appeal

It’s good to have the fuse map, but it sure would be nice to reverse engineer the equations.
by Dave
Wed Mar 01, 2023 6:58 am
Forum: Compatibles Corner
Topic: Sandy Keyboard Interface, appeal
Replies: 22
Views: 15704

Re: Sandy Keyboard Interface, appeal

I wasn’t involved in the design or build of the keyboard interface. I would love to reverse engineer it and see if it could be adapted for more modern keyboards - which should be a trivial matter.
by Dave
Wed Mar 01, 2023 6:55 am
Forum: Hardware
Topic: My QXT640 thread
Replies: 22
Views: 3728

Re: My QXT640 thread

SPEM supplied a fair amount of stuff to Sandy. Most of it was decent ideas implemented fairly ok but of very very poor quality construction.
by Dave
Sun Feb 26, 2023 2:10 pm
Forum: For Sale
Topic: Tetroid TDI 1, Power Regulators and ROM Switchers ALL SOLD
Replies: 12
Views: 10488

Re: Tetroid TDI 1, Power Regulators and ROM Switchers

It’s amazing the lengths some people will go to for beer money!
by Dave
Sun Feb 26, 2023 6:51 am
Forum: Hardware
Topic: My QXT640 thread
Replies: 22
Views: 3728

Re: My QXT640 thread

Let’s add to this family picture.
by Dave
Sat Feb 25, 2023 5:17 pm
Forum: Compatibles Corner
Topic: CST THOR 20 2F
Replies: 9
Views: 5637

Re: CST THOR 20 2F

The batteries start leaking because of a chemical process. When discharged, the contents expand compared to new state. Containing a paste with a liquid electrolyte, the electrolyte is the only thing that can move and is forced out. Even if you see no signs of leakage, there can still be some electro...
by Dave
Sat Feb 25, 2023 5:04 pm
Forum: Hardware
Topic: My QXT640 thread
Replies: 22
Views: 3728

Re: My QXT640 thread

Was the XTAL on this QL changed from 15 MHz? No, it's a 15 MHz, just has hot glue around it for some reason. The first few machines people got, they would look in them and ooh and ahh a lot, and touch things, and the commonest problem was people breaking the xtal. Hot glue was an elegant solution t...
by Dave
Sat Feb 25, 2023 4:47 pm
Forum: For Sale
Topic: Tetroid TDI 1, Power Regulators and ROM Switchers ALL SOLD
Replies: 12
Views: 10488

Re: Tetroid TDI 1 + 2, Gold Card, Power Regulators and ROM Switchers

I'd like the TDI2 card, please.
by Dave
Fri Feb 24, 2023 6:31 pm
Forum: Hardware
Topic: My QXT640 thread
Replies: 22
Views: 3728

Re: My QXT640 thread

They were generic cases sourced by SPEM. The cases came with the front and back panels, which were all milled by hand. They were then powder coated and had the logos applied. Some of them, a step was skipped and they shed the white like crazy. A shame, really. The keyboard interface is absolutely wo...