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lither
Joined: 04 Dec 2005
Posts: 1362
Location: Taiwan
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 Posted: Wed Aug 13, 2008 11:10 pm Post subject: UMC U5SF super 33 |
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Hi
here is a UMC 486 with a new prefix : U5SF
regards
Lee |
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CPUShack
Joined: 16 Jun 2003
Posts: 34259
Location: State of Jefferson, USA
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lither
Joined: 04 Dec 2005
Posts: 1362
Location: Taiwan
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| Posted: Wed Aug 13, 2008 11:36 pm Post subject: |
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| CPUShack wrote: | interesting markings
wonder why parts of words are missing
like 'sal' and 'reser' |
it also miss
"patents pending''
and it is the earliest plastic UMC 486 i have ever seen |
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debs3759
Joined: 18 Jan 2006
Posts: 9477
Location: Northampton, Divided Kingdom
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| Posted: Thu Aug 14, 2008 3:53 am Post subject: |
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Nice find! That's only the second time I have seen that part number (and I have no record of where I saw the first one - I only know I have it listed on my site!). I believe 33MHz is the only speed to have the U5SF marking.
_________________
My graphics card database can be found at http://www.gpuzoo.com.
I can resist anything except temptation.
Debs |
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picur10
Joined: 22 May 2006
Posts: 1229
Location: Budapest, Hungary
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| Posted: Thu Aug 14, 2008 4:36 am Post subject: |
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| Are you sure it's not a fake just a strange cpu? |
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debs3759
Joined: 18 Jan 2006
Posts: 9477
Location: Northampton, Divided Kingdom
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| Posted: Thu Aug 14, 2008 4:59 am Post subject: |
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http://datasheets.chipdb.org/UMC/U5S.txt shows that this is a valid part number for a UMC 486SX-33 in PQFP. I have not seen any original UMC documentation for the 486, so cannot confirm (and can only test one if I ever get one on an adaptor).
_________________
My graphics card database can be found at http://www.gpuzoo.com.
I can resist anything except temptation.
Debs |
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lither
Joined: 04 Dec 2005
Posts: 1362
Location: Taiwan
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| Posted: Thu Aug 14, 2008 6:09 am Post subject: |
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| picur10 wrote: | | Are you sure it's not a fake just a strange cpu? |
i dont know
i just set up a 486 system to test it .
it boots as U486SX-S.
it returns
"U5S 0423"
under Deb's cpu-id program |
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debs3759
Joined: 18 Jan 2006
Posts: 9477
Location: Northampton, Divided Kingdom
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| Posted: Thu Aug 14, 2008 11:43 am Post subject: |
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Those results make sense (at least, to me they do!).
U5S and U486SX are two different naming conventions for the same processor group (and same set of CPUID). F is the package, so will not show on a test.
I guess I really should get my act together, and start upgrading the software, to give a more user friendly interface, among other things 
_________________
My graphics card database can be found at http://www.gpuzoo.com.
I can resist anything except temptation.
Debs |
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lither
Joined: 04 Dec 2005
Posts: 1362
Location: Taiwan
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| Posted: Thu Aug 14, 2008 8:05 pm Post subject: |
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| debs3759 wrote: |
I guess I really should get my act together, and start upgrading the software, to give a more user friendly interface, among other things |
your program is great. a small suggestion, if you would revise it someday,add a copyright line like "(C) Debs" |
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cedrik
Joined: 16 Oct 2011
Posts: 2008
Location: Rom�nia
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