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Neon_WA
Joined: 08 Nov 2008
Posts: 7146
Location: Margaret River, West Australia
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 Posted: Sun May 20, 2012 11:37 pm Post subject: some interesting VIA C3 pieces |
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Thought I would post a few of the other C3s I got in the lot containing the ES
most are production but there are a few other gems in there
As they came from a testing facility most dont have any top markings.. but very nice anyway 
First is a wafer sample from same production lot that the 600A ES on chipdb.com is from
http://www.chipdb.org/img-cyrix-via-iii-500a-mhz-c58-es-6135.htm
Second is an unfinished Ezra-T (C5M) processor
Third is a completely unmarked processor.. hopefully I will get some time soon to test and find out if Samuel or Samuel 2
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Marcin
Joined: 02 Jan 2005
Posts: 8519
Location: Poland
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| Posted: Mon May 21, 2012 1:35 am Post subject: |
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They have different gold points at corners too. I love VIA CPUs from that era. Congratulations.
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Neon_WA
Joined: 08 Nov 2008
Posts: 7146
Location: Margaret River, West Australia
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| Posted: Mon May 21, 2012 1:48 am Post subject: |
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| Marcin wrote: | | They have different gold points at corners too. I love VIA CPUs from that era. Congratulations. |
Thanks mate
I am constructing a database on C3s.. and thought about noting the pin 1 marker.. but decided to leave.
I may revisit as I have kept a list of where each processor has come from
Unlike pin 1 markers on other chips.. I have a feeling there is a pattern with C3s
Also doing the db.. it made me realise that there are quite a few that dont understand the differences between non A & A version C3s 
some thinking 100 & 133FSB is the difference 
Things I have learnt.. is when markings changed
via CYRIX III >> VIA cyrix III was week 01 2001
VIA cyrix III >> VIA C3 changed week 18 / 19 2001
and ring around VIA started week 42 2002 but wasn't consistent until week 07 2003
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Neon_WA
Joined: 08 Nov 2008
Posts: 7146
Location: Margaret River, West Australia
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| Posted: Sat May 26, 2012 3:51 am Post subject: |
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decided to test this interesting looking C3 ES
on boot-up kept saying it was 600MHz (120MHz x 5.0)
but no matter what I set the bus or multiplier to it ran at 66MHz x 9 (600MHz)
the interesting thing apart from unusual number of caps
is that 4 out of 5 CPUid programs listed the L2 cache on the Ezra-T as 16Mb 
http://www.cpu-world.com/cgi-bin/CPUID.pl?CPUID=19052
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gshv
Joined: 01 Feb 2003
Posts: 7898
Location: Fairfax, VA USA
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| Posted: Sun May 27, 2012 12:02 am Post subject: |
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| Neon_WA wrote: | the interesting thing apart from unusual number of caps
is that 4 out of 5 CPUid programs listed the L2 cache on the Ezra-T as 16Mb |
Interesting, I haven't seen "Cache is disabled" for any AMD and Intel processor. I'm going to fix the identification program (server part of the program). I think if the cache is disabled then the program shouldn't display the size and other information for the cache.
Gennadiy |
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Neon_WA
Joined: 08 Nov 2008
Posts: 7146
Location: Margaret River, West Australia
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| Posted: Sun May 27, 2012 12:10 am Post subject: |
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will play around with some non ES A versions once i find a replacement board for the 2 I fried
and see what comes up with them
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Neon_WA
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Location: Margaret River, West Australia
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