Bill, I haven't been fortunate enough to go to Share..I wish
Scott ford www.identityforge.com from my IPAD 'Infinite wisdom through infinite means' > On Dec 10, 2013, at 11:32 AM, DASDBILL2 <[email protected]> wrote: > > After learning of the existence of XDAP in one of Dr. Rannie's SHARE > presentations, I tried it out when I got home from SHARE. I found that XDAP > is much, much easier to use than all the various pieces which must be > interconnected correctly in order to use EXCP. XDAP is a macro which expands > into code that builds a channel program and an IOB, then does an EXCP > followed immediately by a WAIT. If you don't need to overlap any other > processing in between the EXCP and the WAIT. then you can use XDAP, but you > will still need an OPENed DCB and a DD statement. Its main drawback, in my > opinion, is that only a small subset of all possible CCW commands are > supported. But one can easily modify the macro's expansion and add code to > build a much more sophisticated CCW chain. It's not quick and dirty, but it > is quick and simple. > > Bill Fairchild > > ----- Original Message ----- > > From: "David L. Craig" <[email protected]> > To: [email protected] > Sent: Monday, December 9, 2013 8:35:25 PM > Subject: Re: "hexadecimal"? > >> On 13Dec09:1528-0500, Gerhard Postpischil wrote: >> >> On 12/9/2013 2:56 PM, Skip Robinson wrote: >> >> 2) That's a shame. Every programmer can benefit from familiarity >> with the hardware - write a test program using EXCP to read a >> multi-volume tape, or use XDAP to read a multi-volume DASD data set >> with unknown block sizes. > I remember Dr. Rannie talking about teaching Intro To Channel > Programming using XDAP, not EXCP, so the students wouldn't have > to worry about IOBs. He was challenged to come up with any > other reason for using XDAP over EXCP. > > Of course, "real" MVS programmers use STARTIO (unless they cannot > get their code into an APF library, of course). ;-) > -- > <not cent from sell> > May the LORD God bless you exceedingly abundantly! > > Dave_Craig______________________________________________ > "So the universe is not quite as you thought it was. > You'd better rearrange your beliefs, then. > Because you certainly can't rearrange the universe." > __--from_Nightfall_by_Asimov/Silverberg_________________ > > ---------------------------------------------------------------------- > 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 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
