NEC 2901?

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gshv



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

PostPosted: Mon Nov 01, 2004 1:16 pm    Post subject: NEC 2901? Reply with quote

Things are slow right now, so I wanted to post something new and interesting. Below is what I think is a 2901 bit slice processor, though I'm not 100% sure:



Genna
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jrmunro



Joined: 01 Feb 2003
Posts: 3149
Location: Vancouver, Canada

PostPosted: Mon Nov 01, 2004 9:34 pm    Post subject: Reply with quote

Genna

Very nice find if it is a bit slice processor.

John
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jrmunro



Joined: 01 Feb 2003
Posts: 3149
Location: Vancouver, Canada

PostPosted: Mon Nov 01, 2004 9:53 pm    Post subject: Reply with quote

I found this site that mentions this chip. Scroll down to 137172-001 near the bottom of the parts list.

http://www.google.ca/search?q=cache:owXHZgEzhrsJ:www.jmargolin.com/schem/atariavl.doc++%22NEC+B2901AD%22&hl=en

INACTIVE_-IC,Microprocessor,4-bit,Bipolar NEC B2901AD
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gshv



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

PostPosted: Mon Nov 01, 2004 11:46 pm    Post subject: Reply with quote

Thanks, John! I didn't check this link - I don't like opening unknown Word documents, and didn't pay attention to "View as HTML" link. It seems to me almost everybody manufactured 2901 - I counted 10 different companies. I still need to find 2901 made by Fairchild, Raytheon and Cypress.

Genna
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jrmunro



Joined: 01 Feb 2003
Posts: 3149
Location: Vancouver, Canada

PostPosted: Tue Nov 02, 2004 12:17 am    Post subject: Reply with quote

I only have 4 manufacturers

Amd
Motorola
NSC
Cypress ( not in the greatest condition ) Got it out of something from the
Scrap Yard.




John
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