if you hadn't already known this about the PDP-8

From: Bob Shannon <bshannon_at_tiac.net>
Date: Thu Dec 13 18:53:18 2001

The HP211x processors use the same subroutine scheme, all the way
up to the later 2113's and 2117's.

Richard.Sandwell_at_roebry.co.uk wrote:

> I think the IBM S/360 was 'stack challenged' too, iirc
>
> //Rich
>
> Hi,
>
> I found this really interesting: The PDP-8 has no concept of a
> stack. It does have sub-routines though. Instead of pushing the
> instruction pointer onto a stack, it's being written at the
> location to which the call is directed (first address of the
> subroutine). Then a return is simply an indirect jump to that
> first address of the subroutine.
>
> This is hillarious! Wasn't the notion of a stack arond already
> before 1965?
>
> fun stuff, isn't it?
Received on Thu Dec 13 2001 - 18:53:18 GMT