Parwez Hamid wrote:
>IBM itself doesn't distribute LINUX.

IBM doesn't distribute Linux yet. If IBM's pending acquisition of Red Hat
completes, that'll change.

>Hitachi’s operating system, VOS

Hitachi's operating system is now called VOS3/XS in its latest iteration,
introduced in 2018. VOS3/XS runs on the new Hitachi AP10000 model machines,
also introduced in 2018. IBM is Hitachi's system technology partner, but
VOS3 does not run on today's IBM Z machines. VOS3 runs on Hitachi's
machines. The latest Hitachi AP10000 is a "cousin" to the IBM z14 ZR1.

Historically, for a couple IBM Z model cycles and with a little adaptation,
VOS3 did run quite well on IBM Z machines. It was VOS3/LS back then, if I'm
correct about vintages. Hitachi built the IBM z800 model for the global
market (including Japan) using IBM processors, and Hitachi also built a
variant of that model for Japan to run VOS3/LS, the VOS3 update introduced
in 2002 that incorporated a very little bit of 64-bit-ness. I think there
was enough VOS3/LS compatibility in the IBM z800, z890, and z9BC (those
three models as I recall) so that it'd run well on the IBM machines, with a
bit of adjustment.

Bernd Oppolzer wrote:
>MUSIC/SP, but I don't know

MUSIC/SP would have some problems starting up on an IBM z14 machine, but I
suspect it'd still run under z/VM with SET MACH ESA. It'd have to be
MUSIC/SP 6.1 or higher, and you would need permission from its copyright
holders.

--------------------------------------------------------------------------------------------------------
Timothy Sipples
IT Architect Executive, Industry Solutions, IBM Z & LinuxONE
E-Mail: [email protected]

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