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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: segfault with large-ish array with GNAT
Date: Fri, 19 Mar 2010 18:02:42 +0000
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Date: 2010-03-19T18:02:42+00:00
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tmoran@acm.org writes:

> IIRC, the Burroughs 6500 had what they called a "cactus stack" where
> branching would occur for new threads.  And there was a Texas Instruments
> microprocessor that had no real stack, but rather a set of registers
> that could be saved to RAM on a subroutine call.
> These preceded DOS.

The PDP-8 worked like that; the JMS instruction stored the return
address in the first word of the subroutine, execution started at the
next word.
   
   JMS FOO    / CALL SUBROUTINE FOO
   

   FOO, +0    / STORED RETURN ADDRESS
   ...
   JMP I FOO  / RETURN

(we only had capitals)

--S