First Indirect Addressing?

From: Hans B Pufal <hansp_at_aconit.org>
Date: Thu Oct 3 11:31:00 2002

Jeffrey Sharp wrote:

> I was thinking of the first machine that supported indirect addressing in
> its instruction set, but we should also count machines where you could
> kludge indirect addressing by modifying the machine code before executing
> it.

But surely ANY computer (other than Harvard architecture machines which
seaprate code from data) can modify their own program. In that case I do
not hesitatte to nominate the Manchester Baby machine, first operational
program in June 1948. It did not have any hardwired indirect addressing
but it could certainly modify its own program.

   -- hbp


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Received on Thu Oct 03 2002 - 11:31:00 BST