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Right. Do you know if there is a version of iOS to run on bare metal servers?

Cheers,
Vlad.


-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxxxxxxxx] On Behalf Of Jim Oberholtzer
Sent: Thursday, May 28, 2020 11:15 AM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: Re: OS/400 on mambo emulator

Basically yes. I don’t think iOS would run under PowerVM. You would need
a POWER compiled version.

On Wed, May 27, 2020 at 4:43 PM Vlad Korge <vladkorge@xxxxxxxxxx> wrote:

Ok, so, basically, your point is that the public emulator is using
OPAL while you need PowerVM to boot iOS, am I understanding it right?


Cheers,
Vlad.

-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxxxxxxxx] On
Behalf Of Yvan Janssens
Sent: Wednesday, May 27, 2020 8:27 PM
To: Midrange Systems Technical Discussion
<midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: RE: OS/400 on mambo emulator

The problem is not just the checks in the boot process; it is also the
boot process itself. Pretty much all POWER-based operating systems
(the BSDs, Linux, AIX, but also e.g. Mac OS 9 and Mac OS X) use Open
Firmware to bootstrap their kernels, which IBM i doesn't use.

You can easily observe this yourself; if you have a recent POWER
systems machine you can change between AIX/Linux and IBM i in ASMI (or
the HMC) to IPL an LPAR, and you won't be able to IPL AIX/Linux on a
partition set to IBM i. You also won't get to the OF prompt when
IPL'ing in IBM i mode (which you do in AIX/Linux mode), and also don't
see any OF-related messages.
Instead, you see the early bootstrap SRCs until control is passed on
to IBM i, after which it goes silent.

If you compare modern IBM i with the older versions of OS/400, you'll
find that the boot process is fairly similar. If I'm not mistaken
there used to be a few RedBooks around for Advanced Diagnostics that
describe it in greater detail.

TL;DR, you won't even IPL an I_BASE media on all public emulators; the
firmware images available simply don't know what to do with IBM i
media. If I'd have to make an educated guess, the internal IBM
emulator would have a different firmware image and a bunch of IFDEFs
to exclude modules that emulate IBM i-specific hardware from public
builds - it's how I would do it.

This all happens before the checks Jim here mentions.


-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of
midrangel@xxxxxxxxxxxxxxxxx
Sent: 26 May 2020 17:04
To: 'Midrange Systems Technical Discussion'
<midrange-l@xxxxxxxxxxxxxxxxxx

Subject: RE: OS/400 on mambo emulator

The short answer is no. There are checks for hardware in the boot
process that would not allow it to load.

IBM can does emulate IBM i internally in various ways but that's only
for development and internal testing.

I highly doubt IBM will replicate the ability to emulate IBM i the way
it did with DOS and VM on the mainframes (yes there was a DOS for
mainframes) since many of those customers bought Intel boxes to run it
on. Turned out to be a huge problem in the end for those customers
and IBM. (they were also kinda funny looking to see huge bus/tag
cables to support printers/tape units to this larger than average
floor standing PC, a double wide if you
will)



--
Jim Oberholtzer
Agile Technology Architects

-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of
Vlad Korge
Sent: Tuesday, May 26, 2020 5:01 AM
To: 'Midrange Systems Technical Discussion'
<midrange-l@xxxxxxxxxxxxxxxxxx

Subject: RE: OS/400 on mambo emulator

Just to add some background to the question...
IBM has released a public version of mambo power emulator for x86 3
years
ago:

https://developer.ibm.com/linuxonpower/2017/04/06/new-open-source-tool
-power
-functional-simulator-installer/
<https://developer.ibm.com/linuxonpower/2017/04/06/new-open-source-too
l-power-functional-simulator-installer/>
However, the package is bundled with the Linux image.
So, I wonder if it would be possible to run the i5/OS images on it somehow?
I.e. do something similar to what z-guys are doing with Hercules.

Cheers,
Vlad.

-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxxxxxxxx] On
Behalf Of Vlad Korge
Sent: Monday, May 25, 2020 6:58 PM
To: Midrange Systems Technical Discussion
<midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: OS/400 on mambo emulator

Hi,
Has anyone tried running os/400 on mambo? Is it even technically possible?

Cheers,
Vlad.


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