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I think it may belong to an 8 bit ISA card that I once had with an MC146818 clock-CMOS IC on it, but I'm by no means certain of that.

No lid over the CLCC 80186?

aaaaand the rest of the parts arrived so the cabling could be completed and verified that the pinout was identical to that seen above. ...

Did you remove the jumper to the system clock on the S100 bus? Dwight

Nice.

The 2mhz crystals arrived (still waiting on the scope). For kicks, I installed one and reconnected trace we'd cut previously. ...

Tandy 3000 XENIX DeskMate??? https://www.ebay.com/itm/Tandy-3000-Xenix-Deskmate-manual/262739577942?hash=item3d2c7fcc56:g:wP4AAOSwiDFYPKKX :D ...

If no one can provide one at that exact frequency, DigiKey has available a service to custom program oscllators at an (almost) arbitrary frequency...

ATI EGA Wonder can display CGA/EGA graphics on a monochrome TTL (MDA/Herc) monitor.

My memory expansion card and keyboard arrived today. I installed the memory expansion card and CFFA3000 and connected the keyboard and everything...

I'd bid if I was close enough to pick them up. The only way to properly ship them is to put them on a pallet or in a wooden crate and I don't think...

Not sure I follow...you go the BIOS and flash utility from here - https://www.lo-tech.co.uk/wiki/CompactFlash_Adapter_for_Tandy_1400_Laptops and it...

From 1988 Tandy Computer Catalog (RSC-19), page 6 (the 3000 page) radioshackcatalogs.com: XENIX Sys. V/286 Operating System 25-4201 595.00 XENIX...

Thanks. I did that for the 74S's. All but 2 show Fault. I got a TL866CS eeprom programmer, that can also test a lot of IC's. I get the same results...

I think the challenge will be two fold: Ensuring its smooth enough, and the color. Paint changes color over time, so you would be hard pressed to...

Thanks I definitely have that but I thought there was a specific release of Xenix 286 for the 3K curated by Tandy. Did they just use the normal Xenix...

Nothing in this project is super critical. A resistance element bending jig would be ideal, if I were making duplicates, but. I'll cross that bridge...

Have a look at Winworldpc.com. There's a variety of Xenixs there.

Hooray! And congratulations! I'd love to get my VAXen (the real one and some simulated ones) up on HECnet, but I don't presently have a persistent...

Amazing these were found after all this time. I loved reading power.supply and switches.doc! Big thanks to Mike and Pete for rescuing them....

Wow both of these have already been bid above what their buy it now prices were and theres nearly a day left on both auctions. Prefer to bid my...

Thanks. I have added it to the '??? Unknown maker' section of http://minuszerodegrees.net/rtc.htm

Reading the manual for that printer, I get the feeling it really needs the PS wheel to properly space, but you might be able to figure out a way with...

There's LiteStep. It seemed ok, but the version I tried was a beta. it was like FVWM IIRC. I tried the 98Lite and it was ok too, but the removal of...