VOGONS


First post, by Ladyhauk

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OK, I have what I consider an awesome find and I am trying to identify the components (mainly motherboard). I think the mother board is an American Megatrends 386 board (maybe an Elegant). I have two controller boards and a VGA board. It is a 25MHZ processor. It also has 2 hard drives. One is a 152MB core international drive and then a 20mb drive. Base memory is 640KB and Ext memory is 11648KB.

I took it apart and cleaned every component and put it back together. It works but is giving me a CMOS error. From what I can tell, the CMOS battery may be in the Dallas chip. Can anyone confirm this? I have some pictures listed below and I would appreciate any help.

http://sardog.org/i386/motherboard_main.jpg
http://sardog.org/i386/controller%20card2.jpg
http://sardog.org/i386/Unit%20turned%20on.jpg

Reply 1 of 11, by Murugan

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Did they use Dallas RTC in 386?
I have 3 systems and all 3 rely on external battery. No CMOS onboard.

Edit: ah yeah there it is, I see it now; Never seen one on a 386. Probably it's dead yes. Socketed or soldered?

My retro collection: too much...

Reply 2 of 11, by Anonymous Coward

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Now that is a big honking 386. 386s that rely on DIP RAM instead of SIMMs are quite early and rare. I think the board you have there might actually be from Intel...a later revision of one of the first 386 boards ever made. It's also possible that it's a DTK or an Arche.

"Will the highways on the internets become more few?" -Gee Dubya
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium

Reply 5 of 11, by root42

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THe board looks very similar to this one:

https://stason.org/TULARC/pc/motherboards/E/E … 0-EV-1830B.html

The CPU and NPU are slightly different. But I would say they all are derived from the same original design. There are some more like this on stason.org. You might want to check there. So maybe they are all clones of an original Intel design, as mentioned before.

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Reply 9 of 11, by Anonymous Coward

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Interesting...it's Northgate. Northgate was pretty expensive stuff. Looks like you even have the Northgate Omnikey keyboard that came with it. I think that alone might be worth at least $100. Why does the case LED say 20MHz if it has a 25MHz CPU? Maybe it was a reject?
According to the ICs on your board, it's likely from 1989 or 1990.

"Will the highways on the internets become more few?" -Gee Dubya
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium

Reply 11 of 11, by Anonymous Coward

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Worked for IBM and had a Northgate? Traitor. I bet if management knew they would've canned him.

"Will the highways on the internets become more few?" -Gee Dubya
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium