[Info-vax] IT shops call on HP and Oracle to kiss and make up

[glen herrmannsfeldt]

MG <marcogbNO at spamxs4all.nl> wrote:
> On 8-10-2011 19:34, Paul Sture wrote:
>> I am not so sure about that.  IBM were doing mainframe 
>> OS virtualization decades ago.

> Isn't that mostly on similar mainframe?  (E.g. legacy OS/360, OS/370,
> OS/380, OS/MVS and so forth for OS/400, iSeries, i5, System i and
> the rest, with the 'pars').  At least, I haven't heard of IBM offering
> these platforms on, say, IBM "x" (x86/-64) or whatever systems.  

There was the IBM XT/370 and AT/370, hardware (two board set that takes
two slots in an XT or AT) and special version of VM called VM/PC.
(Software runs both on the 370 and 8088/80286 and communicates
through the ISA bus.)   Disks are emulated with MS-DOS files.

Then later, the P/370 and P/390, again hardware/software sets,
though they don't require special OS versions, at least for the
OS that they were designed to run.  Again, disks emulated as files,
though on an OS/2 system.  

And then there is FLEX, as I understand it software emulation of
ESA/390, and special license terms to run it.  

-- glen