Do you have access to the SHARE.ORG website?
There are presentations for dump reading for various areas (LE, CICS,
Application) that would be a good start.
Then there are the REDBOOKS - ABC's of z/OS System programming.
Become familiar with using IPCS to read SVC Dumps.
This is a large area.
On Thu, 19 Aug 2010 05:32:15 -0700, Lloyd Fuller wrote:
And BOTH of the LA commands shown are bad coding practice
in these days of cross
memory: add the , to make R11 and R12 be base registers
and not index registers.
From experience that type of problem is difficult to debug
when a problem
Ensuring the base registers are 4096 apart is important when using based
USINGs for items within the referenced area. A 4095 increment requires
separate USINGs for each register, resulting in separate USING ranges. A
4096 increment allows a single USING statement and a contiguous USING range.
If
That is true if you KNOW that you are going to only be in AR-mode. In the cases
that I have seen in the past, the program was only conditionally in AR-mode. In
fact, part of the time it was executing on hardware that did not even have
address registers.
My point was: avoid problems downstream
On Wed, 18 Aug 2010 23:27:30 -0600, Paul Gilmartin wrote:
On Aug 18, 2010, at 17:30, John R. Ehrman (408-463-3543 T/543-) wrote:
I think the original posting was pointing out that you lose only
a single byte of addressability by adding 4095, and that you save
one instruction. The added byte
On Aug 19, 2010, at 07:25, David Bond wrote:
Ensuring the base registers are 4096 apart is important when using based
USINGs for items within the referenced area. A 4095 increment requires
separate USINGs for each register, resulting in separate USING ranges. A
4096 increment allows a single
On Thu, 19 Aug 2010 08:48:34 -0600, Paul Gilmartin wrote:
If for instance, a DCB crosses base registers and the DCB fields are to be
referenced via a based USING on the IHADCB DSECT, the difference between
the two matters. It works only if the single USING statement is employed.
I have run
On Aug 19, 2010, at 09:12, David Bond wrote:
Given:
USING DSA,R13,R12
or:
USING DSA,R13
USING DSA+4096,R12
with:
USING (IHADCB,IHADCB+DCBLNGQS),SYSPRINT
MVC DCBDDNAM,=CL8'SYSOUT'
...
DSA DSECT
...
SYSPRINT DCB ... (generated DCB starts
Gil,
(or should I use Paul?)
Is there any form of USING for multiple base registers and long
displacements,
Multiple is (per documentation) 4096 and then the next.
or is it merely unthinkable that any DSECT would
require multiple base registers with long displacements?
that would be a
