Paul said:
> You're quibbling over semantics. A program that
> uses 32-bit data registers and 32-bit address
> registers and 32-bit code pointers and 32-bit
> data pointers is a 32-bit load module.
There is just so much wrong with that statement. Address registers are
only 31bit, not 32bit. The first bit is ignored on real IBM hardware.
Same for data registers, code pointers and data pointers. And there is
not such thing as a "32-bit load module" on *REAL* IBM hardware. (If you
want to talk 64-bit, that is another animal.)
No matter how many time you say it, it does not make it true. 32bit does
not exist on any IBM mainframe.
You keep saying it is semantics. It's as much semantics as saying Red is
Blue.
Tony Thigpen
Paul Edwards wrote on 05/09/2018 08:26 PM:
On Wed, 9 May 2018 19:17:37 -0500, Joe Monk <[email protected]> wrote:
There is no such thing as a 32-bit load module on any of the platforms you
have mentioned.
You're quibbling over semantics. A program that
uses 32-bit data registers and 32-bit address
registers and 32-bit code pointers and 32-bit
data pointers is a 32-bit load module.
IBM 370 machines running MVS 3.8J (OS/VS2 3.8) are incapable of running
32-bit code due to their use of the high bit for passing parameter lists,
which is the entire reason for the existence of the 2GB-4GB bar.
That is not correct. You can run in AMODE 64
so long as you step down to AMODE 24/31
(wherever you were loaded) prior to executing
whatever code requires the parameter list
convention. You also need to obtain the memory
for the parameters from 31-bit storage. AM64
means that 32-bit modules no longer need to
be constrained by the 2GiB bar, which is the
entire reason for this thread.
BFN. Paul.
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to [email protected] with the message: INFO IBM-MAIN
----------------------------------------------------------------------
For IBM-MAIN subscribe / signoff / archive access instructions,
send email to [email protected] with the message: INFO IBM-MAIN
