On Thu, 24 Sep 2009 16:11:34 -0400 "Robert A. Rosenberg" <[email protected]> wrote:
:>At 19:50 -0500 on 09/22/2009, Paul Gilmartin wrote about Re: Long :>parms ... again (was: Reading DD card information): :>>For a good example of how your primary mode programs :>> can pass parameters, consider the way the system uses :>> a register to pass information in the PARM field of an :>> EXEC statement to your program. :>> ... :>> When your program receives control from the system, register 1 :>> contains the address of a fullword on a fullword boundary in :>> your program's address space (see Figure 2-4). The high-order :>> bit (bit 0) of this word is set to 1. The system uses this :>> convention to indicate the last word in a variable-length :>> parameter list. Bits 1-31 of the fullword contain the address :>> of a two-byte length field on a halfword boundary. ... :>This provides a way to support PARMX while staying compatible with :>PARM (and programs that use it). If PARMX is not supplied in the JCL, :>act as now. If there is a PARMX pass a 2 FW list in R1 (with the :>second FW flagged as end-of-list). :>FW 1 points at a HW containing 0 (as currently occurs now in the :>absence of a PARM), while FW 2 points to a HW and the PARMX contents. :>If both PARM and PARMX are supplied, pass both. It would have to be FW4. FW2 points to the overriding DD list and FW3 points to the page number. -- 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: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
