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About Mad-Mike

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About Mad-Mike
I'm a once "collector" of Vintage IBM Compatible hardware now gone retro-gamer/retro-computing enthusiast in what little free time I have available. The 486 era is my favorite and I tend to prefer stuff in the same style as the Compaq Deskpro 8086/286/386.
Sparks, NV
For the purpose of this site, 8088-80486 Era DOS/Wintel machines.
I.T. Guy & Musician


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January 15th, 2021 11:33 PM
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February 25th, 2005
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Recent Entries

NEC Versa PC-4xx Model List

by Mad-Mike on January 13th, 2021 at 09:40 AM
Basically a quick list to identify what model Versa you have by the PC-4xx model number on the bottom...and other information for an upcoming video that might prove useful.

400 - Intel 486 DX-20 SLC, 4MB RAM base, 20MB MAx, WD SVGA video, Dumb Battery, no trackball
410 - Intel 486 DX-25 SLC, 4MB RAM Base, 20MB Max, WD SVGA video, Dumb Battery, no Trackball
4?0 - Intel 486 DX-33 SLC, 4MB RAM Base, 20MB MAX, WD SVGA video, Dumb Battery, no Trackball
440 - Intel

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Laptop Plastic Repair - Superglue/Baking Soda Experiment

by Mad-Mike on January 11th, 2021 at 10:58 AM
Did about 5 hours of footage on Saturday of this little excusrion - I will post later once I've had time to edit.

Basically, repaired most of the damaged plastic on my NEC Versa P/75 case using baking soda and Superglue. I have heard of this for a long time and have been VERY skeptical about it, kind of funny since I have used this before in guitar repair to repair nut slots that are too low. It just seems that this solution seemed to "Mr. Ed" for me to believe.

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40EC is charging again, 2021 Plans

by Mad-Mike on January 4th, 2021 at 12:49 PM
Fixed the NEC Versa 40EC power supply board, turns out I melted a wire between the secondary pack negative terminal on it's way to the circuitry. I replaced it with a thinner wire. The machine now charges and runs like normal. Just needs a new battery, and I located the company that made the battery for my P/75 & M/75 - they make a version for the Ultralite/E/V models as well, so I'll spend on that sometime down the road this year.

That said, I think 2021 is going to be a bit

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Vintage Laptop Experiments - My ideas forvintage laptop structure issues.......

by Mad-Mike on December 18th, 2020 at 01:35 PM
So the P/75's trackball started getting erratic last night and I troubleshot the issues to relate to the laptops's loose plastic bits interfering with the operation of the VersaTrak. So I took out the loose bits, threw some tape on the inside, and viola....the computer is happy as a bug again.

But this has me thinking, a lot of the problems with 90's laptops that I've had have been 2 types of issues - power, and structural issues. Something I've been interested in with regards to

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More Versa Shennanigans......Cool Idea to rehouse the M/75

by Mad-Mike on December 10th, 2020 at 10:12 AM
So, while the M/75's case is crumbling like Feta Cheese to the point I can't use it anymore (that's why I said it "died") - at least not in it's current state.....I got a crazy idea......old computers don't come to the Creeping Network to die, thjey come to the Creeping Network to be reborn as something better than they could have been in their time.

The #1 problem with all these vintage laptop computers is the darn cases. I've owned about 10 of them, and they would make

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