Wouldn't a regular IPL sequence qualify as a self-modifying channel program?
Typically: Read more CCWs from the IPL device then TIC to those CCWs
(IBM Mainframe Discussion List) wrote:
In a message dated 3/8/2007 9:42:12 P.M. Central Standard Time,
[EMAIL PROTECTED] writes:
In my book, that's not *really* a self-modifying channel program. (It's
just
using the same data area in more than one CCW. I know of at least one ISV
product in use today that writes from a buffer and later in that same
channel
program, uses the same buffer for input.)
I agree. To me, a self-modifying channel program is one that alters any
part of any of its CCWs, any control fields that they references (e.g., locate
record's 16 parameter bytes), or any indirect address list used by any of its
CCWs.
--
Chris Langford,
Cestrian Software:
Consulting services for: VM, VSE, MVS, z/VM, z/OS, OS/2, P/3x0 etc.
z/FM - A toolbox for VM & MVS at http://zfm.cestrian.com
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