W dniu 2019-02-02 o 01:42, Tony Harminc pisze:
On Fri, 1 Feb 2019 at 09:29, R.S. <r.skoru...@bremultibank.com.pl> wrote:
IMHO the topic is HMC for zPDT. Unfortunately zPDT does not have HMC in
any form, real or emulated.
It's not mainframe, it's only emulation.
No, zPDT *is* a mainframe. It implements a permitted subset of the
architecture documented in the Principles of Operation.
The HMC is not described in the Principles of Operation. It replaces
the knobs, lights, and switches that provided the operator interface
on older systems. Some of the *functions* performed by the HMC are
architected (and are implemented by zPDT without an HMC), but none of
how it works or what the interface looks like. Here is the only
description of anything like an HMC in the POO:
No, zPDT is not mainframe. It is emulator, like Hercules.
Of course there is no single official definition of mainframe - you can
say the emulator on PC is real machine, for me it's emulator, for some
sales people big PC server deserves to be named mainframe (despite it
can run Windows).
Of course there were older IBM mainframes in pre-HMC era or just were
non-IBM mainframes (ICL, GE...)
--
Radoslaw Skorupka
Lodz, Poland
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