On 2018-08-06, at 23:35:58, Bernd Oppolzer wrote:

> BTW: the German mainframe Telefunken TR440 had some similar instructions
> which were not protected the same way like EX. There were at least three
> ways to stop the CPU from a non-privileged program ... I recall them being
> called "Schecher-Stop type n" (n = 1,2,3), because Schecher was the name
> of the famous programmer who exploited them :-)
>  
Someone once told me that on VM/370 if he typed "CP SLEEP" on the login
panel ...

Might have been a configuration error.

-- gil

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