In <u2na3a2b85f1004261647jf9afa40cp79205a256f610...@mail.gmail.com>, on
04/26/2010
at 07:47 PM, Tony Harminc <t...@harminc.net> said:
>Where did the 2301 fit in?
The 2301 and 2303 were drums.
>but support was dropped in MVS.
The drums were not nearly as effective as a fixed-head disk on a block
multiplexor channel. However, I believe that Stanford refitted drum
support to MVS for use by Orvyl.
>The 2880 wasn't announced for all S/360 models,
Only the high end, e.g., 360/85.
>Control Register 0 ...
>but perhaps they added them on the /85 and /195?
No, assuming that by "/195' you mean the 360/195 and not the 370/195,
which was essentially the same box. I believe that the bit mapping in
360/67 control registers was different from the S/370 control registers.
The 370/195 had control registers, and I might consider that to be a
S/360, but I don't know of any S/360 other than the 360/67 and 370/195
that had them.
--
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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