2361 Core Storage
Purpose: Large capacity direct access core storage for a S/360 mdl 50,
65, or 75 (not a 2065 mdl MP)
Purchase MMMC
Model 1 1,048,576 bytes $188,200 $449
Model 2 2,097,152 bytes $314,050 $689
Jim Elliott <[EMAIL PROTECTED]> wrote:
I believe the 370/155 and 370/165 had core memory, and later in
their lives DAT was available as an RPQ or a field upgrade on
those processors. I think the 370/168 and certainly the 370/158
came with DAT and solid state memory on the base model.
OK, here is a little correct history of the models.
S/370 155 and S/370 165 did not have DAT capability and therefore
were not virtual storage (VS) capable systems. The S/370 135 and
S/370 145 did have DAT but this was NOT in the original
announcement.
When VS was announced on August 2, 1972 the 135 and 145 got VS
support via a microcode EC. There was a very expensive option to
upgrade the 155 to a 155-II and the 165 to a 165-II which
basically added DAT. Very few customers took up this option as
the more attractive ($) option were the S/370 158 and S/370 168
which had DAT and VS built-in.
And as a side note, the expansion memory frames on some of the S/370
machines did have their own machine number, but I can't remember those
numbers (except 3360 for the 155).
http://ibm.com/ibm/history/exhibits/mainframe/mainframe_intro.html
Mod MT Announce Memory
155 3155 1970-06-30 core
165 3165 1970-06-30 core
145 3145 1970-09-23 silicon
135 3135 1971-03-08 silicon
155-II 3155 1972-08-02 core
158 3158 1972-08-02 silicon
165-II 3165 1972-08-02 core
168 3168 1972-08-02 silicon
138 3138 1976-06-30 silicon
148 3148 1976-06-30 silicon
http://ibm.com/ibm/history/exhibits/mainframe/mainframe_FS370B.html
Jim
--
Jim Bohnsack
Cornell University
(607) 255-1760
[EMAIL PROTECTED]
