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Dual Pentium EISA SBC (Diversified Technology ESP3520)

Yes! Shadowlord's document gave me the idea to write a config file. Other than the manual turned up by Starcat, I've found absolutely nothing on the website. Starcat showed me how you can filter by text in the URL in Wayback and I spent some time with that looking for zip/cfg/etc files without luck.

I have a message about to someone re: the Compaq QVision 1280/E video card.

I've also decided to test the system a bit further by installing an OS. I tried both NT 3.51 and 4.0 and they both crash in the installer when attempting to initialize the network card, so I need to pull that and try the network again. This is close enough to something resembling success that I'm irrationally optimistic enough to start looking for a second P90 for some SMP action.

I guess if I can get an OS installed, stable, and running reasonably well with my current hacked config filed I'd probably just keep using it, but if I reach a block then I'd try to adjust it further.
 
The ESP3520B, amongst other DTI SBCs, was used as the CPU board in the Tektronix Profile PDR 100 Video Disk Recorder. Evidence of this can be found in this Tektronix manual on Grass Valley's web site (see page 31):
https://wwwapps.grassvalley.com/docs/profile/PROCDRM/070989701.pdf

Photos of the PDR can be found here:
https://www.bonanza.com/items/like/1532406832/Tektronix-PDR-100-Video-Disk-Recorder

The PDR software was called the Profile System Software which came on CD-ROM and included the Profile Configuration Manager, a NT app that managed the CFG files. Logically there has to be a version of that software that included a CFG file for the ESP3520B.

The Grass Valley web site has release notes and other documentation for multiple versions of the software:
https://wwwapps.grassvalley.com/cgi...pnav&super=broadcast&set=servers&fmt=prodlist

Hope that helps!
 
Yup, I've started barking up the PDR100 tree. I emailed that bonanza seller and another one on eBay a few days ago but no response yet. One ebay seller has a couple drives for sale and screenshots of the contents... one has "c:\ecu." The system seems pretty cool, but that PDR 100 is a bit above my impulse purchase threshold.

No luck on Tek or GV websites yet (including archive)

I can't find the software to download... yet?
 
Small progress-ish: I pulled the network card and NT4 installed without issue. It seems to function perfectly. Memtest also passed. So I will retry the network card at some point and see what happens.

I wanted to try the 1280 again, but this time I flipped switch 1 which I understand to be primary or secondary interface (with some help from a user on Vogons who has the paper manual). This let me boot up the system with the 1280 installed (while using the ISA VGA), but it is asking for !CPQ31FF.cfg when I go to configure it. Of course, I can't find this file anywhere so I've started digging through softpaqs.
 
Still no luck finding the cfg file. I may try editing one of the other files that are supposed to be for a 1280 and see what happens, what's the harm in yet another bogus EISA config file.

In other news, I picked up a second P90 to try that feature out and ... nothing. I plugged the CPU in, and there is no mention in the splash/config screen of a second CPU, nor in the BIOS. I can't find any options to enable a second processor. It doesn't even get warm. There are no jumpers or bios settings to enable a second CPU. I know the CPU works because I can put the new one in the primary CPU socket and the system boots.

I've never run a dual P5 system (P2 and up), there is nothing silly like the second CPU won't be enabled until the OS starts it, is there?
 
Anyone know what this style of CPU cooler is called? I'm trying to find a second as the sockets don't have hooks for a standard socket 7 cooler.

2025-09-07 10.23.53.jpg
 
Wildfire said:
Did you try "socket 5 cpu cooler" ?
Click to expand...
Yup. There is one that might work for $20 or so. I wasn't sure if there was a better term that would pull up a bunch.

And yes, I have 50mm heatsinks and thermal tape from a RS/6000 project so that is plan B. Someone else suggested 3d printing so I'll see if I can whip something up out of ABS that would work.
 
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