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I thought we better open a proper thread for this organization. I'll open with a suggestion VCF member "68K" and I discussed last night in IRC chat. On August 1-2, (Saturday and Sunday) from 9AM to 6PM there is a "retro-gamer" event in Plano TX; it might be a good event for the North Dallas...

Message thread moved back to Charrisa's.

expired notice

...or dried out firmware. You know... I've heard that those EPROM stickers over the transparent windows are necessary to keep the JMP instructions inside.

True. Probably of note is the remains of the header plastic now. While obviously dried out, if its a different plastic material core it would make some sense. In other words it might be a two plastic molding. But I've cut and dug into the plastic of those things too many times over the years...

I like the sealant theory but... it seems to really only occur on the once glossy black headers. There appears to be a little that has fallen off and speckled the area nearby. So I'd expect that black plastic had a dipped-coating that has dried out or broken down. It appears superficial and...

I've been looking around the vintage computer archives now for almost 6 months and one thing I've noticed is that their is not too much information on the Tandy 4000... at least that I've found. As this is the Tandy/Radio Shack forum, hopefully you all know better sources for this type of...

Interests: =================== (01) Designing a eZ80 system to run 256 64K pages multi-tasking (02) Designing Solid State Drive for non-PCs below using Floppy interface. (03) Designing a non-PC interface to modern peripherals via the floppy disk interface Collection: =================== (01)...

Early S-100: My First Computer's Evolution I planned to buy an Altair or Imsai in early 1977 but as I did product research the Cromemco product seemed better. After buying an 8K memory card (4Mhz capable) on sale for $228, I bought a Z-2 chassis kit with their 4Mhz ZPU for about $650?. I wanted...