IBM System/360 architecture: Difference between revisions

Revision as of 04:03, 20 May 2023

Revision as of 08:38, 14 December 2023

Line 982:

* The '''Load unit'''<sup class=reference>[[#PoOps|PoOps]]</sup>{{rp|pages=124–125}} controls provide the rightmost 11<ref group=NB>There is an inconsistency, in that ''Interruptions from More than Seven Channels''<sup class=reference>[[#PoOps|PoOps]]</sup>{{rp|page=121.4}} allows for more channels.</ref> bits of the device from which to perform an IPL.

* The '''Load Key'''<sup class=reference>[[#PoOps|PoOps]]</sup>{{rp|page=125}} starts the [[#Initial Program Load|IPL]] sequence.

* The '''Prefix Select Key Switch'''<sup class=reference>[[#PoOps|PoOps]]</sup>{{rp|page=125}} selects whether [[#Initial Program Load|IPL]] will useduse the primary prefix or the alternative prefix.

* The '''System-Reset Key'''<sup class=reference>[[#PoOps|PoOps]]</sup>{{rp|page=125}} initiates a [[#System Reset|System Reset]].

* The '''Stop Key'''<sup class=reference>[[#PoOps|PoOps]]</sup>{{rp|page=125}} puts the CPU in a stopped state; channel programs continue running and interruption conditions remain pending.