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lither
Joined: 04 Dec 2005
Posts: 1362
Location: Taiwan
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 Posted: Tue Dec 30, 2008 1:14 am Post subject: U5 |
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Hi
Here is an U5 confidential i got this Xmas 
PS:the bottom is blank |
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CPUShack
Joined: 16 Jun 2003
Posts: 34259
Location: State of Jefferson, USA
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johnorun
Joined: 04 Apr 2008
Posts: 3364
Location: Chicago, IL- US
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| Posted: Tue Dec 30, 2008 2:02 am Post subject: |
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| CPUShack wrote: | | wow thats pretty cool, certainly a rarity |
Yeaa, Santa was good to you! |
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Windmiller
Joined: 24 Jun 2005
Posts: 1716
Location: Chapel Hill, NC
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| Posted: Tue Dec 30, 2008 8:06 am Post subject: |
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| Not for US Sale or Import....very cool Hugo!!! |
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debs3759
Joined: 18 Jan 2006
Posts: 9477
Location: Northampton, Divided Kingdom
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| Posted: Tue Dec 30, 2008 8:34 am Post subject: |
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Very cool chip! Datecode week 2 1994, with copyright 1994, it'll not be easy to get an earlier example
| Windmiller wrote: | | Not for US Sale or Import....very cool Hugo!!! |
That marking is quite common on UMC 486 chips. I don't recall the full story but I think they could not sell in the US because of copyright issues.
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thomsonicus
Joined: 11 Dec 2007
Posts: 226
Location: Poland
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| Posted: Tue Dec 30, 2008 11:10 am Post subject: |
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that's right debs. UMC copied too many intel ideas and as an outcome of a lawsuit UMC agreed not to sell their cpus in the states.
nice cpu man!
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Sten
Joined: 04 Feb 2006
Posts: 358
Location: Czech Republic
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chipcollector
Joined: 28 Sep 2004
Posts: 1681
Location: New England
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Borris70
Joined: 24 Apr 2003
Posts: 988
Location: Germany
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| Posted: Tue Dec 30, 2008 2:09 pm Post subject: |
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great find 
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Windmiller
Joined: 24 Jun 2005
Posts: 1716
Location: Chapel Hill, NC
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| Posted: Tue Dec 30, 2008 5:40 pm Post subject: |
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Nice Sten |
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lither
Joined: 04 Dec 2005
Posts: 1362
Location: Taiwan
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| Posted: Wed Dec 31, 2008 1:32 am Post subject: |
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| debs3759 wrote: | Very cool chip! Datecode week 2 1994, with copyright 1994, it'll not be easy to get an earlier example
... |
yes , this is the oldest U5 i have ever seen
the chip is also special in a few points
1.it is the only U5 (ceramic ) without "Green CPU" i have ever seen
i believe it is make before the concept of green cpu
2.it is the only U5 with a 1994 copyright
3.without speed mark
there is another U5 with similar features
http://www.chipdb.org/img-umc-u486dx2-u5-green-3240.htm
U5 486DX2 owned by vincio
it also has a special copyright " 1995"
and also without speed
i believe U5 486DX2 of vincio is a sample
actually, someone told me that UMC 486DX2 is only produced as sample
| chipcollector wrote: | awesome chip! is it for trade ?  |
sorry,i have only one |
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