z/OS 1.4 - last system with so called bimodal accomodation - a right to
run in 31-bit mode on 64-bit machine.
z/OS 1.5 - last system able to run on 31-bit machine.
z14 - first machine which disabled ESA/390 mode for IPL. z/OS 1.13 was
the first which run on z14.
Of course this is a little bit off-topic, since the original question
was about VSE 6.3 :-)
To complement, z/VSE 6.2 supported up to 10 CPs, but used only up to 4
CPs. That means it will not run on 11+ CPs LPAR, but on i.e. 8-CP LPAR
it will run and use max. 4 CPs. Up to 32GB of memory, however you could
assign more to the LPAR. The rest will be unusable.
--
Radoslaw Skorupka
Lodz, Poland
W dniu 15.01.2023 o 01:36, Mike Schwab pisze:
OS/390 v2.10 had PTFs to add 64 bit mode.
z900 announcement z/OS 1.01 had 64 bit mode included.
Default 64 bit with 1.04.
About 1.10 64 bit required.
z14 Around 2.01 IPLed in 64 bit.
On Sat, Jan 14, 2023 at 5:07 PM Steve Thompson <ste...@wkyr.net> wrote:
I get the understanding that it and the current release of z/VSE
from IBM are effectively the same (kinda like OS/390 V2.10 and
z/OS 1.1 -- assuming my memory is correct on the last release of
OS/390):
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