Is it a 486 DX2-66 Engineering Sample?

bccwchan · Joined: 20 Sep 2004 Posts: 2585 Location: Hong Kong

I bought a unusual 486DX2-66 on ebay? Would someone tell me whether it's ES or not?

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=6745365238&fromMakeTrack=true

Thanks.

CPUShack · Posted: Mon Mar 07, 2005 12:36 am Post subject:

If its made in USA then most likely it is an ES.

gshv · Joined: 01 Feb 2003 Posts: 7898 Location: Fairfax, VA USA

Good find! Can you post markings from the back of the chip?

Gennadiy

popo · Joined: 18 Feb 2004 Posts: 520 Location: Formosa

How about this?

Is it 80486 or cache controller?

CPUShack · Posted: Tue Mar 08, 2005 1:49 am Post subject:

or an in circuit emulator for something

fRaSsL · Joined: 31 Mar 2003 Posts: 1570

P24 is the code for i486DX I think?

Elar · Joined: 16 Jul 2003 Posts: 746 Location: Tallinn, Estonia

P24C was code name for 486DX4 3,3V clock tripled CPU.

gshv · Joined: 01 Feb 2003 Posts: 7898 Location: Fairfax, VA USA

This looks like engineering sample of A80486DX4-75 to me.

Gennadiy

CPUShack · Posted: Tue Mar 08, 2005 12:05 pm Post subject:

for got about the P24C Smile

I agree.

bccwchan · Joined: 20 Sep 2004 Posts: 2585 Location: Hong Kong

Sorry to late reply. The back of the CPU reads:

C2171574-C
USA
EE 21

I have a question. If it's ES, why doesn't its stepping # start with Q but SY? Is it have special meaning?

Billy

CPUShack · Posted: Tue Mar 08, 2005 7:52 pm Post subject:

Intel does not ALWAYS follow its standards.

popo · Joined: 18 Feb 2004 Posts: 520 Location: Formosa

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