First computer with real-time clock?

From: Vintage Computer Festival <>
Date: Mon Aug 2 19:38:55 2004

On Mon, 2 Aug 2004, Paul Koning wrote:

> Vintage> The overall discussion is very useful, but in my particular
> Vintage> case, it needs to pertain specifically to the IBM 650,
> Vintage> because the assertion at hand is that a document used to
> Vintage> discredit a certain scientist's claim to a certain
> Vintage> achievement has a date stamp on it that is claimed was
> Vintage> produce by the IBM 650 using its internal clock feature.
> Vintage> The 650 does not have such a feature inherently, so now I'm
> Vintage> trying to determine if there was ever an adjunct product
> Vintage> that IBM produced to give the 650 the ability to tell time.
> It sure doesn't look like that from the docs on Al Kossow's website.
> It seems that the 650 doesn't have interrupts, which would make a
> simple periodic tick type system pretty problematic.


> If the exercise is to attach the credibility of the document, it looks
> to me like you have enough data to do that. You can clearly say
> "there isn't any such thing as an 'internal clock feature' on the
> 650". That puts the ball in the other party's court, to try to
> demonstrate that there did exist some obscure add-on of which not a
> word appears in the dozen or so IBM docs that are on-line.

Exactly. But I'm trying to be as thorough as possible in this research
since I may well end up acting as an expert witness in the upcoming trial.

> And even then, another question becomes whether the time stamp is real
> or a forgery, independent of what machine generated it.

Two separate forensic tests performed on the alleged document indicates
several problems with it. My client is pursuing all angles because he
wants a slam dunk. So I'm going to help him deliver it ;)


Sellam Ismail                                        Vintage Computer Festival
International Man of Intrigue and Danger      
[ Old computing resources for business || Buy/Sell/Trade Vintage Computers   ]
[ and academia at  || at  ]
Received on Mon Aug 02 2004 - 19:38:55 BST

This archive was generated by hypermail 2.3.0 : Fri Oct 10 2014 - 23:36:32 BST