386 motherboard 486 socket

This is rather specific and the probability of a good answer is low.
I have recently been given a motherboard out of an old 386 with a 486 upgrade socket on it unfortunately if I insert a 486 processor it fails to recognise the chip or initialise at all.
I guess a jumper setting needs changing to make it work.
The board is labelled m359p80 and has an opti 82c495sx chipset the original 386 processor was an AMD 386-40.  The board was made in thailand I guess in about 1993 according to the bios th only other clue to its origins is a label with tam/40-p8 marked on it.
If anyone can come up with a description of what settings the jumpers should be on then I'll be pretty amazed/grateful.
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Your best bet is to go to www.sysopt.com\mboard.html.

You'll find there a listing of all known mother board manufacturers and detailed methods of identifying your board.
In a shop I've worked, we sold these M/Bs. I can get the manual/jumper settings for you.
If you don't find it on the site proposed by cymbolic, let me know and I'll get back.
mklAuthor Commented:
I've already checked the sysopt page and had difficulty locating an online manual for this motherboard.
I'd be most grateful if anyone (Henrie?) could forward a copy of the manual/relevant jumper settings.
I've got no copy here at home, I'll get it for you and I'll be back tomorrow with the settings.


Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
We're having no luck this week :(

I've got a CAM/33/50 Motherboard (OPTI 495sx), which has the possibility for 386/486 processors, but it has VLB.
I also got a lot of manuals, the one closest to yours is the TAM/40-U0, but I doubt if this is the right one for your M/B, because it has no 486 socket.

The vendor using the boards was Autocomputer Co., in Taiwan. Brand: Auva.
You can check this at boot time and look for the bottom string. When it says something like:
The 1105 stands for Autocomputer Co.

Some addresses:

16851 Knott Ave.                        
La Mirada
CA 90638    
phone  :  714-562-6999
FAX     :  714-562-6990  
Present:  Chris Yang                    
Contact:  Sherry Lin                    
Year Started 1986

Distributor , Manufacturer , Pc System , Mother Boards , Add-On Cards , AUVA Taiwan

No.18,Pei Yuan Rd.,Chung Li Ind.  
phone:  886- 3-452-8200     CEO    :  Annie Tsao          
             886- 3-452-8220
fax:       886- 3-452-9155     Contact:  Arthur Luk          

One of the top 10 Taiwan PC manufacturers.Recogni-
zed for the high quality of its "AUVAMEDIA" multi-
media PCs,AUVA brand mainboards,PCs,notebooks,etc.

Maybe you can contact one of them.

I also searched every possible link in many engines, but found no manual or jumpersettings.
I will continue searching for you, a lot of friends bought these machines, most likely someone has the right manual.
When I find it I'll let you know.

It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.