According to the Planning and Administration manual, if you're on an ESA machine, XA
and ESA are the same:
"For compatibility, VM/ESA continues to accept the designation XA to indicate 370-XA
architecture. However, whether the virtual machine is defined using the XA designation
or the ESA designation makes no difference when running VM/ESA. A virtual machine
defined as XA has the capabilities of an ESA virtual machine and is considered to be
an ESA virtual machine. Except for the CP QUERY SET command which will return machine
XA or machine ESA."
----
Robert P. Nix internet: [EMAIL PROTECTED]
Mayo Clinic phone: 507-284-0844
RO-CE-8-857 page: 507-270-1182
200 First St. SW
Rochester, MN 55905
---- "Codito, Ergo Sum"
"The three chief virtues of a programmer: Laziness, Impatience and Hubris."
-- Larry Wall, author of Perl
> -----Original Message-----
> From: Daniel Jarboe [SMTP:[EMAIL PROTECTED]
> Sent: Thursday, October 02, 2003 7:34 AM
> To: [EMAIL PROTECTED]
> Subject: Mach in user direct
>
> We are running linux images with 31 bit addressing under z/VM. The
> machine arch for our linux images has been defined by our VM sysprog as
> XA. Is there any disadvantage/advantage of this vs. ESA or some other
> architecture as far as the linux images are concerned? My initial
> thought was that the compiler/assembler may choose different
> instructions for increased effeciency depending on the architecture it's
> building for, but I don't know if there's any truth to that thought or
> if there'd even be any differences. Is there any reason to change the
> architecture, and if so, could the change have any adverse impact?
>
> Thanks,
> ~ Daniel
>
>
>
>
>
>
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