Help me identifing a motherboad with socket 7

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Help me identifing a motherboad with socket 7

Postby nokia2010 » Fri Aug 19, 2016 2:02 pm

Got me an computer with Socket 7 motherboard. Unfortenley, the manufacturer didn't put it's name on it. I hope I will be able to upload a picture soon, but untill then I will give a description. I will split it in 2 rows: right is where the procesor is, left where the sockets are.
Right: from bottom up:
1) "IQS" MVI05A507 EPROM memory;
2) 2ODIN" OEC12C887A;
3) W48C60-414G - 2nd row 5111 9634p;
4) W2457AK-15 2nd row 95471;
5) brown socket;
5) "Intel" PCIset SB82437VX L6341834 SU116 Intel (M)(C) '95 and on the right of it 4 rectangular shape chips with the samller side facing up/down;

II) Left side:
1) 4 I.S.A. socktes;
2) On the left of the 4 sockets, and "Ambios" 586 (C) 85-95 American Megatrends D552087 Bestkey 9616F-S-H EPROM memory;
3) Between 1 and 2nd sockets 1 chip and free place for 2 about 3/4 of the lenghts of the one (it's on the left side); b ) A slot of a chip about the same lenght as the big on from above and 5 chips (on the riht) about 3/4 in lenghts (between the 4th and the 5th a capactior); c) One sized one, capacitor, 2 another chips, space, one 3/4 of lenghts chip;
4) 3 x P.C.I. sockets;
5) In the left of the down P.C.I. soket a rectangular chip with small sides facing up/down "UMC" UM8669F 9631-AYA V20745;
6) On the left (and above the one from the left) on the 2nd socket 2 small rectngular chips. Brand not idenfitied;
7) 2 I.D.E. connectors (large side up/down) and one F.D.D. connector (small side up/down);
8 ) 4 SIMM slot;
9) Space for 4 DIMM slots.

Numbers: MT0000S2560000 250004750 MVO E150 9338
Refernce MVR4841

Manufactured: dec. 1996

I need to set the jumpers, because I replaced the original procesor ("Cyrix") with an "Intel" one.
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Re: Help me identifing a motherboad with socket 7

Postby Karlsweldt » Fri Aug 19, 2016 3:53 pm

Did the motherboard work normally with that Cyrix CPU? If so, put it back in and fire up without a keyboard.
If the BIOS is set for "halt on all errors", then the first screen should freeze and then check for a string of characters in the lower left corner. That is a positive ID of the motherboard, BIOS and date of issue.
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Re: Help me identifing a motherboad with socket 7

Postby nokia2010 » Fri Aug 19, 2016 4:21 pm

I don't know. The computer was a gift from somebody who sayed the processor was dead. I've put and P.C.I. video card and no image poped up. Ufourtenley, before I could put an I.S.A. one of the jumpers felt and I don't know what was the good position.
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Re: Help me identifing a motherboad with socket 7

Postby nokia2010 » Sat Aug 20, 2016 2:03 am

Image

Image

Image
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Re: Help me identifing a motherboad with socket 7

Postby Karlsweldt » Sat Aug 20, 2016 5:51 am

Don't see the regular coin-sized BIOS battery in those images. But by the CPU, there is an object with "Odin OEC 12C887A" on the top. That is similar to the Dallas Real-Time BIOS battery, and 1/2 the BIOS configuration. Hopefully, it is in a socket!
The BIOS battery retains settings in the CMOS memory, and also powers the real-time clock. If the real-time clock is not working, usually no life signs from a motherboard! Typical life of the battery in that setup is maybe 5 years max. Depends on how long it was powering circuits.
If in a socket, hopefully you can find the exact replacement and get some use from the system.
Look at the base of that item, may be a slightly smaller piece under it. If so, then the part can be easily removed. If not, then possibly some careful surgery can expose the battery in the top part, and an external battery of 3 volts can be connected.
Here is a possible fix, if the part is soldered to the motherboard.. http://www.mcamafia.de/mcapage0/dsrework.htm
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Re: Help me identifing a motherboad with socket 7

Postby evasive » Sat Jan 28, 2017 10:46 am

IT-MVI05A507 -> IT-MVI05A507
http://forums.windrivers.com/showthread ... 5-I430VX-H
An AMIBIOS ID String Was Detected:
51-1703-008005-00111111-071595-I430VX
-- ---- ------ ------
| | | |
| | | Chipset/BIOS Info
| | Manufacturer ID
| Version Information
Processor & BIOS ROM Information

The Manufacturer Code Detected (8005) Does Not Have A Database Entry.

The Following AMIBIOS Project Tag Was Found: _TG_0DH_17_TVXDEMO
AMIBIOS Tag Detected: 0DH_17_TVXDEMO - Gateway"

0DH_17_TVXDEMO -> MB520N
http://www.elhvb.com/mboards/vtech/stri ... 0bios.html
PcPartner VTech MB520N but the OEM code (008005) is different from PcPartner. I cannot find a reference for that OEM code yet. On top of that the layout is different too. So, next question is to remove the board from the case and see if the solder side has any info or there's a sticker on the side of the ISA slot, some makers put the info in there. There may be a part number under the "MT000256000"sticker as well.

From the coloring I would say it's a BCM board but I can't find an exact match yet.
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Re: Help me identifing a motherboad with socket 7

Postby evasive » Sat Jan 28, 2017 11:37 am

To make it boot you need 2 SIMMs of equal size in there, not just one. If you want to boot with just one memory stick that would need to be a DIMM.
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