On Oct 28, 2007, at 9:02 AM, (IBM Mainframe Discussion List) wrote:
In a message dated 10/24/2007 12:52:33 PM Central Standard Time,
[EMAIL PROTECTED] writes:
I am curious If I > can induce a Machine check without actually
messing with
the pysical machine...
Yes. Any of the 6 interrupt classes can be induced as follows: your
authorized program (must be authorized) simply does a LPSW that
points to the new PSW
location for the interrupt you wish to induce. The wisdom and
repercussions
of doing this I leave to others.
If you wish the induced interrupt to cause a particular action,
then you must
first disable interrupts and store data in the POO-defined storages
areas
that that particular interrupt is involved with so that the
interrupt processing
routine will act as you wish. E.g., when a machine-check interrupt
occurs,
data is stored in the machine-check logout area that describes the
exact nature
and location of the failure. When an I/O interrupt occurs, two
full words are
stored in predefined areas in PSA that are related to the device
from which
the interrupt came.
Be sure to do all this dangerous learning on a test system running
under VM
or on a P/390 where you have complete hands-on control and where no
other work
will be impacted, as you will also have the opportunity to do many
reIPLs.
Bill Fairchild
Franklin, TN
Snip---------
Bill:
Which brings up an interesting point. Does a P390 have a machine
check light on it? :)
Ed
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