On 2016-Mar-19, at 11:40 AM, Paul Birkel wrote:
> -----Original Message-----
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Brent
> Hilpert
> Sent: Friday, March 18, 2016 5:41 AM
> To: General Discussion: On-Topic and Off-Topic Posts
> Subject: Re: Code listings for the I4004 or I4040
> .....
>
> I had a failed 4201 chip (clock gen), it would be nice to come across a
> replacement, but solved the problem with a substitute made from 3 CMOS
> chips.
>
> -----
>
> Brent: Could you share your CMOS circuit design for a 4201 substitute?
> THX!
Dwight's ebay solution may be preferable but otherwise:
http://www.cs.ubc.ca/~hilpert/tmp/timing4201.pdf
