[rescue] [OT] S: IBM /370 or /390 card

[Mike Meredith]

On Wed, 13 Sep 2023 07:42:59 +0000, Andrew Back via rescue wrote:
> It was interesting to learn that hardware virtualisation support 
> (logical partitioning) is implemented in microcode, and seemingly
> this is based on IBM VM, the software product which started out under
> that name on System/370 (and before that as CP/CMS and CP-40 on
> System/360).

Somewhere there's a history of VM (IBM SHARE?) that's quite
fascinating. It seems that the corporate types were eager to kill it
off (presumably because they wanted to sell more mainframes); it may
well have been the 370 developers that saved it - VM allowed them to
'disguise' a 360 as a 370. And they had one each.

-- 
Mike Meredith (http://zonky.org/)
  “Those who can make you believe absurdities, can make you commit
atrocities.” ― Voltaire