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40-0400-428036-00101111-121291-UNICHIP-F
Posted: Thu Aug 22, 2002 12:23 pm
by Mick
within this foruml I'd like to request if you could help me in the identification of a motherboard manufacturer.
I tried the amibid tool. But this did not deliver any info.
On the surface of the chip the following code is visible:
AMIBIOS
American Megatrends
486DX ISA Bios (c) 1992
AA 0916676
during the boot sequence on the screen appears:
American Megatrends Inc.
40-0400-428036-00101111-121291-UNICHIP-F
Kindly let me know, if you can help with any further information.
Posted: Thu Aug 22, 2002 1:10 pm
by ajzchips
These people might help you:
http://www.unichip.com.tw
They seem to be the manufacturers of your chipset.
Posted: Fri Aug 23, 2002 8:57 pm
by edwin
Gemlight/DTK board, one model with this chip, the GMB-486UNP:
http://th99.piloti.dyndns.org/m/E-H/33912.htm
Gemlight/DTK board is not the right one
Posted: Wed Aug 28, 2002 2:42 pm
by Mick
Hi Edwin,
sorry that I'm answering late. I must apologize for that...
Unfortunately the figure of the motherboard you posted is not the right one.
Enclosed please find a sketch of the motherboard
regards Mick
edit by edwin: the image in ASCII has been removed. I got it by email, I'll try and put it online somewhere.
Posted: Wed Aug 28, 2002 7:45 pm
by edwin
Check here:
http://webhqnl.fateback.com/
I think I have got a match with the same chip and largely the same layout.
http://th99.piloti.dyndns.org/m/U-Z/30989.htm
486 WB-U1 board is not the right one
Posted: Wed Aug 28, 2002 9:19 pm
by Mick
Hi Edwin,
this 486 WB-U1 board fits better, but I think it is not the right one, because on my first sketch there are two electronic components that I didn' t find on your figure 30989-1.png.
I didn't pay attention to the position of the jumpers. But I found a stamping on the back side:
YANG AN YA-1
94 V-0 E 114 139
9237
handwritten (white paint) turned upside down to the stamping
143012
Enclose please find an update to my first sketch related to the 2 electronic parts I did not find on your figure.
Best regards,
Mick
[img]MB_486DX2_2.png[/img]
Posted: Wed Aug 28, 2002 9:31 pm
by edwin
You will have to put that picture somewhere on the internet if you want the rest of the world to see it. We cannot access your harddisk...
Posted: Wed Aug 28, 2002 9:57 pm
by Mick
Hi Edwin,
I sent this via e-mail to you ...
Regards
Mick
edit by edwin: putting online means upload the picture to a webpage somewhere and put a link to it. Pasting it here will not work. Note: I just saw my reply-to address is wrong, that should be
edwin@wimsbios.net NOT
elhvb@wimsbios.net
Posted: Thu Aug 29, 2002 7:24 am
by edwin
The Samsung 83C206 is a multi I/O chip, they are often left out of the sketches. If it had been there in the 486 WB-U1 sketch would your board fit? Is that rectangular shape in the sketch in the right place if I tell you it's a metal thingy (crystal oscillator)?