- How old are the LG and STG instructions
with a view to finding out when they will
be outside any possible 20-year patent
IBM may think they have?
- ---In firstname.lastname@example.org, <kerravon86@...> wrote :
> Yes, that is my understanding. It is alsoI have found the first version of z/Arch,
> my guess that BSM with the low bit set
> was also part of the first cut of z. Is that
> guess correct?
which is what I will probably stick to
for decades for my own programming,
as part of "lowest common denominator".
12 January 2001
I believe those dates mean that on
2021-01-01 z/Arch 1.0 should be
out of patent. So less than 4 years
from now. It may be necessary to
strip greater than 1.0 functionality
from Hercules in order for it to be
Or do we need the date that the
physical hardware was shipped
to a commercial customer not
covered by a NDA?
BSM is documented here:
and so I can confirm that the clever
trick of using bit 63 for BSM (which
I rely on in the MVS/380 mods to
allow 64-bit programming), which
may be subject to patent, was
available in the first cut of z/Arch.
So as soon as z/Arch comes out
of patent, it has everything I need.