Those 1820-xxxx numbers remind me of lots of HP boards I've looked at over
the years.
Dick
-----Original Message-----
From: Christian Fandt <cfandt_at_netsync.net>
To: Discussion re-collecting of classic computers
<classiccmp_at_u.washington.edu>
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_at_netsync.net
> Member of Antique Wireless Association
> URL: http://www.antiquewireless.org/
Received on Tue Sep 14 1999 - 09:21:34 BST