Brad H vintagecomputer at
Mon Oct 23 01:45:42 CDT 2017

I'm going to put it on my list of projects to create a CPU card for my Microtutor that uses the 1802 instead I think.  I can get some blue PCB stock.  As far as I understand the 1802 is fully backward compatible.
Maybe the 1801s will show up on day.  I've found all kinds of chips I was told were impossible to locate.

Sent from my Samsung device

-------- Original message --------
From: Steven Feinsmith <steven.feinsmith at> 
Date: 2017-10-20  7:32 PM  (GMT-08:00) 
To: Brad H <vintagecomputer at>, "General Discussion: On-Topic and Off-Topic Posts" <cctalk at> 
Subject: Re: CDP1801 

RCA 1801 disappeared from face of Earth forever... You would be better off to purchase at: to use 1802. The 1802 was very successful microprocessor that replaced 1801 because it required to have a pair of chips to work together. I believe I saw 1801 was more than 30 years ago.

Good luck!

On Wed, Oct 18, 2017 at 9:45 PM, Brad H via cctalk <cctalk at> wrote:
Hi there,

I just purchased an RCA Microtutor minus the rather important CPU card.  I

can recreate the card but I expect locating the 1801 chips will be

difficult.  I am just posting this in various forums in case anyone has any

leads on where I might find either the complete card or the required chips

to make a replacement.  I'm wondering what, if any devices were built with

the 1801 that I might be able to scrounge from.

Thanks again,


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