Intel 4001 without "C" preifx

[gshv]

Is it rare? -



I don't actively collect support chips, so I don't know how rare it is. When I bought it I thought that these are not rare. I looked at cpu-zone, theintelcollection, and a couple of other sites and couldn't find any without "C" prefix.

Gennadiy

[CPUShack]

just the grey striped package (C prefix or not) is very rare.

[Robev]

I would think it was extremely rare!

I just looked up George Phillips Guide to Vintage Intel Chips and he does not show any without the "C" prefix so I would say it would have a value of US$300 plus.

Cheers

[wepwawet]

And in like new condition:-)

That's a pretty nice find.

What I am just wondering is the strange combination of part number and program code number.
I've never seen one with a "-", btw, 0207 is pretty early (I guess they started with 0001 and just counted up). My lowest number is 0226 on a gold pinned P4001 with no date code.

Anythind on bottom?

[gshv]

[pphillips12]

1st one of those I've seen.

[mcpublic]

I assume many of you know that the Intel 4001 is a mask-programmable ROM for the 4004 microprocessor (MCS-4 family). The four digits after the dash indicate which custom-made metal mask was used to program the ROM. I do not know whether they were truly sequential, but I can confirm that they did start at -0001. Check out http://www.cpu-museum.com/Bilder/Busicom-Circuitboard_1.jpg You can see here the first four production P4001s ("P" prefix means plastic package), and a nice gray-traced C4004 in the middle. If you are interested in the schematics, die photograph, or mask artwork for the 4001, visit http://www.4004.com/mcs4-masks-schematics-sim.html

[wepwawet]

Hi Tim, great work!
Let me know when you start work on the 4040 (I can give you highres-dieshots:-)

Michael (the Kienzle-guy:-)

[Windmiller]

Great Info!