New subject: HP IC numbers was:Re: Britain is Great (Back from the Island)

14 Sep 1999

Those 1820-xxxx numbers remind me of lots of HP boards I've looked at over
the years.

Dick

-----Original Message-----
From: Christian Fandt &lt;cfandt(a)netsync.net&gt;
To: Discussion re-collecting of classic computers
&lt;classiccmp(a)u.washington.edu&gt;
Date: Monday, September 13, 1999 7:05 PM
Subject: HP IC numbers was:Re: Britain is Great (Back from the Island)

...
 Upon the date 07:12 PM 9/13/99 +0100, Tony Duell said
something like:

   All but 3
parts have a numbering like 1820-0xxx, wher xxx is 
Almost all HP logic chips are 1820-xxxx :-). And these ones are not in my
list of equivalents, which means they might well be custom (I would
suspect a lot of them are, since there's nowhere near enough parts to
make a calculator using MSI TTL here). 
 -- snip --

Tony and others:

I can't recall for sure but has someone posted anywhere a cross ref list
between HP house numbers and industry equivalent numbers? I thought there
was some discussion here a long time ago about this but I'm subscribed to
several other lists which could have had the same type of discussion.

Thanks for any pointers folks!

Regards,  Chris
-- --
Christian Fandt,         Electronic/Electrical Historian
Jamestown, NY  USA      cfandt(a)netsync.net
        Member of Antique Wireless Association
        URL: http://www.antiquewireless.org/ 