On Wed, 18 Jul 2012 12:12:13 -0400 Thomas David Rivers <[email protected]> wrote:
:>I'm debugging a program (no source), and trying to :>figure out what BDAM does when the READ macro :>is invoked without a BLKREF relative-block-address :>specified. :>This is an RBA-type BDAM, and I'm seeing a READ :>where the BLKREF in the DECB is simply X'0'. :>I thought the BLKREF field would point to a location :>that contained the relative-block-address value. :>So - what does BDAM do with such a thing - does it :>read the "next" block (where next would be the one :>after the current one.) Or??? :>It doesn't seem to fail/ABEND in anyway... seems to :>merrily read _something_ - just not sure what. :>I've looked thru various IBM books, but can't seem to :>find a definition of what happens when the READ :>doesn't specify a BLKREF parm. The BDAM READ :>documentation doesn't seem to say its optional, :>but I can slap together an example and leave it off... :>I suppose my question boils down to: :> What does BDAM READ do if the BLKREF macro :> parameter is omitted? What is the second parameter of the read? -- Binyamin Dissen <[email protected]> http://www.dissensoftware.com Director, Dissen Software, Bar & Grill - Israel Should you use the mailblocks package and expect a response from me, you should preauthorize the dissensoftware.com domain. I very rarely bother responding to challenge/response systems, especially those from irresponsible companies. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
