In
<CAPD5F5oS=2wrluhxwtpjbcjbx8v0m9-nymvcfyjpbzket9u...@mail.gmail.com>,
on 02/16/2012
at 11:45 AM, John Gilmore <johnwgilmore0...@gmail.com> said:
>The original System/360 scheme was simple and in its way elegant.
>01F---decodable unambiguously into (multiplexor) channel 0, control
>unit 1, and that control unit's device F or 15
Actually it was ambiguos, lacking knowledge of the particular
controller. The address was cuu, where uu specified the controller and
the device, but there could be multiple controlles with the same 4
high bits and there could be controllers with more than 16 devices.
--
Shmuel (Seymour J.) Metz, SysProg and JOAT
ISO position; see <http://patriot.net/~shmuel/resume/brief.html>
We don't care. We don't have to care, we're Congress.
(S877: The Shut up and Eat Your spam act of 2003)
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