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skold



Joined: 30 Nov 2003
Posts: 960
Location: Canada
PostPosted: Sat Apr 02, 2005 7:46 pm    Post subject: cyrix Reply with quote
im scanning all my cpus, and ive got enough cyrix ones now to warrant giving them their own section on my site..

is the ibm blue lightning dx2 a cyrix design? im going to be including the ibm 6x86 ones with the cyrix's...
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gshv



Joined: 01 Feb 2003
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Location: Fairfax, VA USA
PostPosted: Sun Apr 03, 2005 12:38 pm    Post subject: Reply with quote
I think it is.

Gennadiy
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CPUShack



Joined: 16 Jun 2003
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PostPosted: Sun Apr 03, 2005 8:11 pm    Post subject: Reply with quote
They are IBMs own design.

IBM had no liscensing with Cyrix at that point.

Cyrix chip were made mostly by TI.
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skold



Joined: 30 Nov 2003
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PostPosted: Sun Apr 03, 2005 8:30 pm    Post subject: Reply with quote
ah cool.

the ibm 6x86 ones are cyrix though.. right
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CPUShack



Joined: 16 Jun 2003
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PostPosted: Sun Apr 03, 2005 8:38 pm    Post subject: Reply with quote
yah. 686 to MII are IBM (as well as media GX)

Nat Semi also made MediaGX (aka Geode) and MII
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skold



Joined: 30 Nov 2003
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PostPosted: Sun Apr 03, 2005 8:54 pm    Post subject: Reply with quote
you mean 'are cyrix' right Smile
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gshv



Joined: 01 Feb 2003
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PostPosted: Sun Apr 03, 2005 9:50 pm    Post subject: Reply with quote
CPUShack wrote:
They are IBMs own design.

IBM had no liscensing with Cyrix at that point.

Cyrix chip were made mostly by TI.


Leave and learn... Thanks John!

Gennadiy
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CPUShack



Joined: 16 Jun 2003
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PostPosted: Wed Apr 06, 2005 1:18 pm    Post subject: Reply with quote
Looking back I think some of the IBM chips did use Cyrix technology.

but the original IBM 486 didnt. (they had a DX33 of their own)

I need to research the transistion point a bit more.

I'll probably end up doing another 'whats on the back of your IBM 486' real soon
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skold



Joined: 30 Nov 2003
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PostPosted: Wed Apr 06, 2005 10:45 pm    Post subject: Reply with quote
for chips like this:

http://www.cpudb.com/cyrix.x?c=486slc

is it correct to refer to the package as tsop? (as opposed to cpga, ppga, opga, etc)

also if anyone can verify or provide any information for that chip that'd be great Wink
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CPUShack



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PostPosted: Thu Apr 07, 2005 1:29 am    Post subject: Reply with quote
that would be a TQFP Thin Quad Flat Pack
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skold



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PostPosted: Thu Apr 07, 2005 2:29 am    Post subject: Reply with quote
ah, tsop is only pins along two sides?
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Minuteman



Joined: 21 May 2003
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PostPosted: Thu Apr 07, 2005 5:39 am    Post subject: Reply with quote
Look at this: http://www.cpu-collection.de/?tn=0&l0=package (ok, it doesn't answer to your question but it may help others)
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morkork



Joined: 25 Feb 2003
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PostPosted: Thu Apr 07, 2005 1:26 pm    Post subject: Reply with quote
The Cyrix Cx486SLC/e is CQFP (Ceramic Quad Flat Package), not TQFP (Thin Quad Flat Package). TQFP is only like 1-2mm thick, like this AMD Am188.
Minuteman wrote:
Look at this: http://www.cpu-collection.de/?tn=0&l0=package (ok, it doesn't answer to your question but it may help others)

Yes, I'll have to enhance this... it covers the most usual processor packages, but there are quite more.
Here is a little overview which also shows SSOP (Shrink Small Outline Package, leads on longer chip sides)/TSOP (Thin Small Outline Package, leads on shorter chip sides): http://www.delec.com/guide/memory/#TSOP
SSOP is typically used for RAM chips on modules and graphic cards, TSOP is commonly used for Flash-chips in USB sticks. I think there also are some embedded versions of the 80186/188 which use SSOP.

For Intel chip packaging please refer to http://www.intel.com/design/packtech/packbook.htm or to the package types overview chapter: http://www.intel.com/design/packtech/ch_02.pdf

BTW, here is a nice article about the evolution of chip packaging from the 1970s to the 90s: http://nina.ecse.rpi.edu/shur/advanced/examples/Electronic%20Packaging.pdf
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CPUShack



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PostPosted: Fri Apr 15, 2005 5:14 pm    Post subject: Reply with quote
By the way, the Blue Lightning is based on a Cyrix design (thus the copyright Cyrix)

However, it is NOT actually a Cyrix chip.
The dies are remarkably different (even between the Blue Lightning and IBM produced Cyrix chips)

In addition the Cyrix core does not support the MSR (machine Specific Register) where as the IBM DOES.

More to follow..
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skold



Joined: 30 Nov 2003
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PostPosted: Sat Apr 16, 2005 4:23 am    Post subject: Reply with quote
maybe, but for my purposes, it has a cyrix logo on it, so ill put it up there

i suppose its similar to grouping the fujitsu 8088's in with the intels, but ill keep those seperate

maybe if i get enough IBM chips ill give IBM their own section. those powerpc ones might just do it Very Happy
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