I would guess, but it just a guess, that it would work with versions of
OS/400 as long as IBM is supporting PowerPC ISA, which will probably be at
least another decade since even the POWER5 is essentially the same ISA.
Since the RISC boxes were introduced the only things that I have heard of
going unsupported, is that with V5R1 there was a minimum amount of RAM
needed that eliminated some of the older model 150's, and I guess there is
limited support for some of the older bus architectures and add-in cards.
If your 820 is PCI-based, you should not have any problems there.

I do not think you will be able to get any guarantees out of anyone, but if
S-Star's are not still supported 3 OS/400 releases from now then that will
mean there is a heck of a lot of change coming our way.

I suspect the Northstars will even still work in that timeframe.

Correct me if I am wrong, but don't the new 810's still only have an S-Star
in them?  You do not get a POWER4 until the 825's.


      To      "'midrange-l@xxxxxxxxxxxx'"
      Subject&nbsp;&nbsp;     SStar/POWER4 OS/400 obsolescence
"Urbanek, Marty" <Marty_Urbanek@xxxxxxxxxxxx>
Sent by: midrange-l-bounces@xxxxxxxxxxxx
03/12/2004 07:26 PM
<HR><font size=-1>Please respond to
Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx></font><HR>
      <font size=-1></font>

We have a model 820 with SStar processors in it.

We need to get a new box, but can't wait for the next series, so we will
probably get one with POWER4.

I need to have a machine for testing with the "next release" of OS/400, but
keep the primary workload on the "current release" (for example, at present
time, V5R3 and V5R2 respectively).

Due to the increased horsepower, my primary workload will move to the new
POWER4 box. I would like to continue using the older SStar box for testing
the "next release". My concern is how many more OS/400 releases will be
supported on the 820 SStar? I'd like to get another couple of
out of it (like maybe V5R3 + 2) but I wonder if that is being too

Anybody know the answer or know where I can find that information?
(educated guesses based on experience definitely welcome)

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