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September 2004, Week 2

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Subject:
Re: 979 vs. 989
From:
"Paul, Guy (San/Storage Delivery)" <[log in to unmask]>
Reply To:
Paul, Guy (San/Storage Delivery)
Date:
Wed, 8 Sep 2004 10:16:57 -0700
Content-Type:
text/plain
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I sent this to Craig off-list but thought I'd post it for all to see:

The only difference I see in a 979 and 989 is the Mhz and the cache
sizes. 979 runs at 180Mhz
989 at 200 and 989/x50 at 240Mhz.

979 has 1k data and 1k instruction cache while 989 and 989/x50 has 2k
data & 2k instruction. 

Bus speeds seem to be the same: 32mb/sec HP-PB into 100mb/sec HP-HSC
into 768mb/sec Processor Memory Bus

      CPU
i-cache D-cache          Memory
       |                   |
------------------------------------------------
       Processor Memory Bus 768mb/sec
-------------------------------------------------
                           |
                      Bus Converter
                           |
----------------------------------------------------
        HP-High Speed System Connect (HSC) 100mb/sec
----------------------------------------------------
            |                                |
         Bus Converter                     Bus Converter
           MFIO                               |
             |                                |
------------------------            -------------------------
  HP-PB 32mb/sec                           HP-PB 32mb/sec
------------------------            -------------------------
  |   |    |     |                     |   |    |     |
 Card card card card                 card card  card card

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