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Jeck
Joined: 24 Jan 2017
Posts: 34
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 Posted: Thu Jul 25, 2019 12:57 pm Post subject: ExpertBoard EXP4349 386/486 combined VLB Motherboard |
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ExpertBoard EXP4349 386/486 combined VLB Motherboard + Intel 486SX-33 + RAM
Sold!
Last edited by Jeck on Wed Feb 26, 2020 7:50 am; edited 2 times in total |
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debs3759
Joined: 18 Jan 2006
Posts: 9477
Location: Northampton, Divided Kingdom
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| Posted: Thu Jul 25, 2019 2:14 pm Post subject: |
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Nice board. If it hasn't sold by the time I can afford to make a cheeky offer, I'll let you know what it would be worth to me 
How many jumpers does it have for bus speed adjustment?
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H3nrik V!
Joined: 15 Apr 2014
Posts: 1246
Location: Denmark
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Jeck
Joined: 24 Jan 2017
Posts: 34
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| Posted: Fri Jul 26, 2019 4:00 am Post subject: |
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| debs3759 wrote: |
How many jumpers does it have for bus speed adjustment? |
Hard to answer) You can choose the processor speed and voltage.
There were several revisions. I have the same board(EXP4349) without a soldered 386 processor slot and a coprocessor slot.
In the specification on the site stason.org the diagram shows the soldered 386 processor, without a co-processor slot, but the board settings are suitable. |
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feipoa
Joined: 08 Mar 2011
Posts: 553
Location: Canada
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| Posted: Tue Aug 06, 2019 5:02 pm Post subject: |
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I have one of these. There's probably a Vogons post on it somewhere. I had the hardest time getting it to run reliably with any CPU, and I'm used to setting up these old boards. I spent several hours on it and it eventually stopped turning on. Sitting in a box now. Hope your luck is better than mine.
I think it supports the oddbadd 3.6 V TI SXL2-66 in PGA-132 format if you install the VRM. |
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Jeck
Joined: 24 Jan 2017
Posts: 34
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| Posted: Sun Nov 17, 2019 1:26 am Post subject: |
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I have one more motherboard ExpertBoard EXP4349, but without soldered connectors 80386 and 387DX.
If anyone has interest let me know. |
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feipoa
Joined: 08 Mar 2011
Posts: 553
Location: Canada
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| Posted: Sun Nov 17, 2019 8:52 am Post subject: |
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How much did the EXP4349 go for? Those are a lot more interesting because they can run 386 and 486 chips. What made the EXP4349 unique was that it has jumper support for a PGA-168 SXL2 at 3.6 V. And still had a 386 NPU socket to run the math-coprocessor. Also the ability to use PGA-132 386 chips. Can you attach a photo of your other EXP4349?
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The only thing I hate more than straightening CPU pins is having CPU's with bent pins in my collection. |
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Jeck
Joined: 24 Jan 2017
Posts: 34
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| Posted: Sun Nov 17, 2019 11:09 am Post subject: |
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In working order, I checked it. For the price I have not thought yet.
This is how it looks:
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feipoa
Joined: 08 Mar 2011
Posts: 553
Location: Canada
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| Posted: Sun Nov 17, 2019 6:31 pm Post subject: |
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Thanks for the photo. It will be quite the effort to convert this to the original EXP4349 - needs CPU and NPU sockets and numerous bridges removed and replaced with jumper headers. Also needs an LT1587 VRM for non 5V chips.
I can offer $35 USD for the motherboard.
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The only thing I hate more than straightening CPU pins is having CPU's with bent pins in my collection. |
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