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OrBit
Joined: 28 Feb 2005
Posts: 245
Location: P.R.C
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 Posted: Sun Nov 20, 2011 8:50 pm Post subject: What's the mean of 'WB'? |
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Hi Guys
I've got this one today ,but I dont know the mean of the 'WB', do you have any idea?
Thanks!
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Last edited by OrBit on Sun Nov 20, 2011 8:56 pm; edited 1 time in total |
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Neon_WA
Joined: 08 Nov 2008
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Location: Margaret River, West Australia
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| Posted: Sun Nov 20, 2011 8:53 pm Post subject: Re: What's the mean of 'WB'? |
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| OrBit wrote: | but I dont the mean of the 'WB', do you have any idea?
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Write Back instead of Write Through
EDIT >> but SK051 is NOT supposed to support Write Back 
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Neon_WA
Joined: 08 Nov 2008
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Location: Margaret River, West Australia
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| Posted: Sun Nov 20, 2011 9:02 pm Post subject: |
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what is the markings on the die cap?
because at the moment I'm guessing it is a DX4-75 remarked to a DX4-100
most likely a SK102 if it does support WB or they may have used a AMD
also by week 22 2000 Intel 486 were white print and dash in the part number was gone
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Chook
Joined: 29 Oct 2008
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Location: Australia
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| Posted: Sun Nov 20, 2011 10:16 pm Post subject: |
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The Intel 486s that supported write back had &EW engraved, whereas your has just &E.
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gshv
Joined: 01 Feb 2003
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Location: Fairfax, VA USA
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| Posted: Mon Nov 21, 2011 1:46 am Post subject: |
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Intel lists this part number in some Product Change Notifications, but I've never seen "WB" suffix before. If the processor is genuine then I agree with Stu that it probably means "Write Back".
Gennadiy |
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Neon_WA
Joined: 08 Nov 2008
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Location: Margaret River, West Australia
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| Posted: Mon Nov 21, 2011 1:55 am Post subject: |
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A80486DX4WB100 is the product ordering code for a 100MHz 3.3V embedded 486 with Write Back
it was not used for the chip markings
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hugo929
Joined: 27 Oct 2006
Posts: 6163
Location: China
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| Posted: Mon Nov 21, 2011 6:44 am Post subject: |
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this is likely a faked processor.
The corner is too large comparing with the normal one.
The normal ratio of x versus y is 21.6, but ratio of this one is 15.9.
see attached photos for illustration.
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