In <[EMAIL PROTECTED]>, on 02/14/2006
   at 06:56 PM, David Speake <[EMAIL PROTECTED]> said:

>This stimulates. Why should they not be able to run
>UNIX/LINEX/AS400/Alpha-VMS or even Windows on Z chips without Z/OS or
>VM. 

 1. AIX/370 and IX/370 ran on older S/370 processorsl it wouldn't
    take much to get them up on zSeries if the source code were
    still around and somebody cared.

 2. Linux *does* run on zSeries without Z/OS and VM, unless you count
    PR/SM as being VM.

 3. There is no support of the instruction sets used by OS/400,
    windoze and VMS.

 4. OS/400, windoze and VMS don't support the S/360 I/O architecture.

Given the resources, you could certainly write some combination of
"microcode" and S/390 code to simulate AS/400 ML, DEC Alpha, DEC VAX
or Intel instruction sets and to simulate the foreign I/O
architectures. It's not clear that it would be worth the effort.

>I saw some S/370 micro code listings about 30 years ago, but...

AFAIK the zSeries puts a lot more hardware at the disposal of the
"microcode" and "millicode" than was the case on, e.g., the 3168.
 
-- 
     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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