RetroTech Chris Profile picture
Apr 16, 2024 19 tweets 13 min read Read on X
I've started to dive into the #VCFEast haul! First up is this nice Pentium Pro Compaq Deskpro 6000. It has 64MB of memory, a CD-ROM, Iomega Jaz Drive, PCI SCSI controller, and a 20GB IDE HDD. Let's explore a bit and talk about setup!

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So, first of all, I bought two Deskpros in anticipation of making one "good" one. I was hoping to swap the faceplates since this one had some broken tabs. No such luck, they are different sizes! I was at least able to swap the power button over!

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For the curious, here are those broken tabs.


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Also, "someone" has been in here before! I found a "non Torx" screw. Definitely not from the factory that way. These little grey nubby Torx screws are more common, there are black ones too! And...oh, the Deskpro engineers were smart: they give you spares! Just unscrew and use.

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Originally, this system had a different optical in it. But the drive had a broken belt, so I swapped in a drive from the "power of CD-ROM power" that you might have seen a few weeks back on here!


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Let's look at the stickers and writing on this thing! I think this was a government PC. Was it really in use (or at least inventoried) until 2015 and decommissioned in 2023? It could be! There was no HDD, I added one, so we may never know.


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Yay! Pentium Pro. And the original Compaq identifier tag with specs too!
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Here's my attempt at keeping the faceplate on. Some tape on the bottom, pulled "tight," and a little bit of tape on the inside. It'll do for now.
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Looking inside, we can see that these are pretty modular. You can pull out the expansion card riser as a complete unit!


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With the expansion card riser out, we can get a good look at the mobo. Look at that huge heatsink for the Pentium Pro! Image
Drive bays are also a bit modular. What's interesting is that you use a "guide screw" to align the drive, then you add more screws to tighten it down! You can see me pointing to the "guide screw hole" here with my screwdriver. And there is a "guide screw" installed on the FDD.


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For the curious, here is the HDD I added. It's a 20GB Maxtor. Image
Here's a look at the back of the case, as well as one of the "sliders" you use to take the case off! There is one on each side.
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When I added the Maxtor drive, the BIOS picked up the change! Image
That said, I did have an issue. The BIOS version installed didn't support BIOS HDDs over 8GB. So I used the Internet Archive to figure out which ROMPaq I needed and pulled the file from the Compaq FTP site archive that I have! From there I made a disk using an LTE 5300.


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Flashing the BIOS was a cinch. Now we are up to date!


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From there, I also installed a Diagnostics Partition on the hard drive. This allows the setup program to be on the hard drive as well for ease of configuration.

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And finally, I ran MemTest, and it passed! And with that, we are all set. I am going to leave this machine as a "blank canvas" for @robivy64 who is going to have some fun with it. Thanks for following along! Image
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More from @RetroTechChris

Aug 16
I bought some memory to upgrade the Pacman PC. SURELY this will go off without a hitch.. surely it will. Okay, let's talk about it, in a 🧵 here! Image
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So, as you saw from the intro picture, we're now showing 1.5 GB of memory in this lovely system. The system booted up into Hannah Montana Linux 😂. That's fine.. we can ask it how much memory it sees. Looking good! Image
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Oh, here's the memory installed. Let's kick off MemTest86+ Image
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Read 5 tweets
Aug 10
I had some "larger" hard drives laying around, and wanted to put one in the new Kehtron computer. But to do that, I had to work around the 528MB limit of this computer's BIOS. Let's use XTIDE to do that...surely this adventure will go off without a hitch... right? Time for a 🧵 Image
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So, first of all, what is this 528MB limit all about? Well, older BIOSes were limited to 1024 cylinders. Around the 486 era, as drives got bigger, BIOSes started to support Logical Block Addressing mode. However, this particular BIOS does not. Image
There are some workarounds! You could use a program like Ontrack Disk Manager which solves the problem in software. You could also upgrade your BIOS to a later version, or even acquire an aftermarket BIOS like MR BIOS (someone put together a nice archive of past versions!) Image
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Read 21 tweets
Aug 9
Got a few things in the mail today! No need to really test the CPU fans or batteries, but let's test the video card! Time for a 🧵 Image
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So, this video card is a Tseng Labs ET4000AX. Here it is next to my other ET4000AX card. Some differences for sure! Image
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I figured I would test this card in the Kehtron 486DX/50 card... and... uh oh! What is the deal here? Seller tested card, and my other Tseng Labs ET4000AX card works in this PC. How odd! Must be a bad card, right? Image
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Read 6 tweets
Aug 4
Okay, let's get some software installed on this "new" 486DX/50 PC of mine. As per usual, nothing was flawless here, so let's go over what went well and where I hit some snags! Time for a 🧵 Image
To get the installers on the box, I decided to use MS LAN Manager and the network. I made a special LAN Manager boot disk with drivers for the Intel EtherExpress 16TP that you see in the bottom of the last picture here. Image
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I've been very curious about how this machine would stack up, so I copied over SpeedSys to benchmark the system. And as we can see, it fell right in line with where it should be! Image
Read 12 tweets
Aug 3
My friend Bill gave me a bunch of case lock keys! Back in the days of the AT standard for cases, keylocks were pretty common on PC clones, and IBM systems as well. Let's see how many locks we can open today. Time for a silly 🧵 Image
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First, the Gateway 2000 you saw in the intro post. First key I tried worked 😂 Image
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Next, let's look at the PS/2 Model 30 286. Not today, not happening, this uses a "more regular looking" key. Image
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Read 9 tweets
Aug 3
I already have too many PCs, but I had to have this cute little guy... and there is also a good nostalgic reason for having it! This 386 (now 486) PC needed a lot of work to get it running, let's talk about it in a 🧵 here! Image
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First, in case you missed it, here's the nostalgic reason. Kehtron is a part of my childhood. And this PC was available locally. The weather was also PERFECT yesterday for making an hour drive to get it and rocking out to some 80s tunes on the way 😂 Image
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Okay, first order of business, I put this on the table and it was rocking back and forth. I soon discovered why! I didn't have a matching foot so I used a little bit of Goof Off to remove the adhesive. And PSA, like with most chemicals, always work in a ventilated area. Image
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Read 19 tweets

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