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  1. Replies
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    Well, I tried the PSU with just the Miniscribe...

    Well, I tried the PSU with just the Miniscribe connected and nothing else, and it still behaves the same way.

    However, I tested the 12V rail and itís reading 11.7V, which is definitely too low....
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    Sounds like a cool machine you had! Here is...

    Sounds like a cool machine you had!


    Here is a pic of the machine in one piece running Windows 2.03 with 16 colors!


    66733


    I'm using my Samsung CGA monitor, which is really good. Has...
  3. I use 30-plus-year-old computers on a regular...

    I use 30-plus-year-old computers on a regular basis, so I definitely don’t care about having the latest and greatest!

    If computers were as interesting today as they were in, say, 1984, I would...
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    Thatís a tantalum capacitor, so it probably...

    Thatís a tantalum capacitor, so it probably failed and went dead-shorted. Really common on old tantalums, Iíve had plenty explode on me.
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    I actually haven’t tried having just the hard...

    I actually haven’t tried having just the hard drive connected and nothing else, but that’s definitely worth a try! Super curious to see what the voltage looks like when the power supply is first...
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    I have not, but I will be doing that soon. The...

    I have not, but I will be doing that soon. The drives take probably like 30+ seconds to spin-down with this PSU, which is INSANE. It should less than 10 seconds. The two drives I tested on here...
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    Thanks for the replies! Didn’t realize this was...

    Thanks for the replies! Didn’t realize this was such a common issue! I like the idea of drilling for a screw, perhaps I’ll try that.
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    IBM XT 130W PSU issue

    The original 130W PSU in my 1986 IBM XT has always an interesting "squeak" when it's turned off, which I'm guessing isn't normal, but it had never had any other issues until I tried to hook my...
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    '86 ibm xt

    I'm finally getting around to building up my 1986 IBM XT how I want it. I've had the machine since late 2013 and have never done a whole lot with it.

    Here is a pic of the inside:


    66576

    ...
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    Here's a pic of the Xebec MFM controller I...

    Here's a pic of the Xebec MFM controller I installed, along with one of it installed in the machine:


    6657566574
  11. Thatís likely a totally different designed drive...

    Thatís likely a totally different designed drive than the ST-251-style units (like the 296N), as itís listed as having 1023 cylinders, which means itís likely voice coil and not stepper actuated....
  12. Some interesting stuff here! This is right up my...

    Some interesting stuff here! This is right up my alley! :)

    I’ve got an old eBay pic of an ST-252 somewhere. Would you like me to try and find it?
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    This machine just gets more original all the...

    This machine just gets more original all the time, I now have an original IBM/Xebec MFM controller connected to the ST-412! Itís the controller that was in my later (1986) IBM XT, but since Iím...
  14. Was there really a 5MB version of the ST-212...

    Was there really a 5MB version of the ST-212 (ST-206)? A quick google search reveals nothing and I’ve never seen it mentioned anywhere before. Didn’t know about the ST-278 either!

    Glad to see...
  15. I’m almost 100% positive the COMPAQ Portable’s...

    I’m almost 100% positive the COMPAQ Portable’s internal CRT is NOT composite, considering it’s dual-mode and how good the color shading is. Also, the internal connector uses like 5 or 6 pins instead...
  16. Wow, that's awesome! Never knew about those. I'd...

    Wow, that's awesome! Never knew about those. I'd love to have one to experiment with. :)
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    Wow, 6 hours! That’s crazy.

    Wow, 6 hours! That’s crazy.
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    Yeah, I’m just completely guessing that could be...

    Yeah, I’m just completely guessing that could be what that’s for, but I really don’t know.




    Thanks! Yeah, tapes can be slow. That’s great you never had a hard drive failure! I have ordered an...
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    It was connected to one of the power connectors...

    It was connected to one of the power connectors on the motherboard. On Deskpros, there aren’t any molex connectors coming out of the power supply, instead there are four connectors on the motherboard...
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    :happy3: Love it!

    :happy3: Love it!
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    I have now added a tape drive to the Deskpro! The...

    I have now added a tape drive to the Deskpro! The one I chose is an Irwin 245, which can hold 20MB or 40MB depending on the type of tape used. I found a person selling a lot of two, and one already...
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    Wow, I’m shocked to hear all of that. These are...

    Wow, I’m shocked to hear all of that. These are usually pretty robust from what I can tell.

    Probably a silly question, but are you using the original Compaq monitor or an aftermarket CGA one? With...
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    The Seagate ST-412 in the XT started giving me...

    The Seagate ST-412 in the XT started giving me troubles (it was really slow and I could constantly hear it returning to track-0) and I’m happy to say a drop of oil in the stepper motor solved the...
  24. What did you use to remove the platters? On a...

    What did you use to remove the platters? On a dual-platter IDE drive, removing them is almost impossible, because if they rotate separately from one another, the low-level formatting gets a...
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    As promised, here are some internal pics of the...

    As promised, here are some internal pics of the Deskpro:


    6597665977


    As you can see, I now have a serial port card and MFM hard drive/controller installed!


    The MFM controller I...
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