Backups [was Re: Is tape dead?]

[Pontus Pihlgren]

On Mon, Sep 21, 2015 at 09:15:13AM -0400, Noel Chiappa wrote:
>     > From: tony duell
> 
>     > In some cases it should be possible to write a machine code program
>     > that executes on 2 processors with wildly different instruciton sets.
> 
> I have this bit set that I was told (or something, the memory is _very_
> vague) that early versions of the KL-10 had this hack; the root block on the
> disk was the boot block both the PDP-10 and the PDP-11 front end machine, and
> the first instruction or two was very cleverly construced and sent the two
> machines different ways. Alas, I looked in the front-end PDP-11 code (in the
> KLDCP; directory) and saw no signs of this, so maybe it was an urban legend?
> 
> 	Noel


Perhaps you are thinking of the 1984 ioccc winner:

http://www.ioccc.org/1984/mullender.c
http://www.ioccc.org/1984/mullender.hint

/P