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Solved What is my MainBoard??

January 2, 2021 at 17:36:58
Specs: ?, AMD N80L286
I'm trying to restore an old Quantus XT Turbo found in my grandfathers attic, I think I want to sell it. But I need to plug all of the I/O buttons and LED's back into the board. All of the headers are labled very very vaguely. Ex: Header "SP" for Speaker has 6 pins, but the speaker only has 2 pins... Also, the turbo button and LED are both labled "TURBO TURBO LED" again with 6 pins. I have been looking all over the internet for some kind of manual or clue to suggest how they plug back in. Voltmeter shows some of the pins provide 5v so I know they are not dead. My board is using an old NiCd battery, 4 short 4 long slots, and an AMD N80L286 as well as 5 VSLI chips, one being a socket. A sticker on the board says "Magitronics 603" but I have not found anything relating to that. Another problem I'm having is I cant get any video to display from the PC. I have no idea if it is a problem with the OS? or the monitor itself? When booting, there are no beeps when the speaker is plugged into any header, so I am assuming there are no problems with the pc. It has a monochrome card I believe. Any help at all would be amazing, thanks.

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#1
January 2, 2021 at 18:06:30
✔ Best Answer
Few people here have insight to such an old machine....
Better to ask it here:

http://www.vcfed.org/forum/forum.php

It may be a day or two before your post shows (spam control).

Note also, that a machine that old likely won't fire-up without significant problems (and if it's been sitting for over a few years, "fired-up" may be a literal description)...

"Channeling the spirit of jboy..."

message edited by T-R-A


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#2
January 2, 2021 at 19:40:30
I doubt an 80's computer is worth much of any except to maybe a collector.

Have a look at this: https://www.recycledgoods.com/magit...
https://en.wikichip.org/wiki/amd/am286

message edited by riider


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#3
January 2, 2021 at 19:58:55
That Baby 286 is a VERY similar board, but after looking at some manuals, the IO pinout is very different, not even on the same part of the board. It is very close though, thank you.

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#4
January 2, 2021 at 20:40:44
"I doubt an 80's computer is worth much of any except to maybe a collector."

Likely the OP is looking at eBay prices. While there's some that go quite high, the key is keeping the machine as "all original" as possible. Of course, eBay pricing is way overblown:

https://www.ebay.com/b/IBM-Vintage-...

but there are some bidders willing to pay quite handsomely for a "working, unaltered" vintage machine...

"Channeling the spirit of jboy..."

message edited by T-R-A


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#5
January 2, 2021 at 23:33:34
You may be able to positively identify the board here:

https://th99.infania.net/

(It'll be one of the 286 motherboards) as well as figure out the jumper settings.


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