Thanks, John. That was my recollection -- that this feature was originally for PL/I.
As luck would have it I am working with (not developing using -- don't ask) OS PL/I V2R3. I have the user documentation but not the PLMs (I'm familiar with the acronym). Any further pointers will be appreciated. Charles -----Original Message----- From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of john gilmore Sent: Tuesday, February 23, 2010 10:02 AM To: IBM-MAIN@bama.ua.edu Subject: Re: Best practice for 24-bit storage in assembler called from C/C++ You will need several DXDs and a single CXD. This machinery was devised originally for PL/I, but its use outside PL/I is fully supported by both the HLASM and the Linker. That said, the best documentation for it is in the old PL/I Optimizing Compiler manuals. (The PL/I Optimizing Compiler was not OCO; the current, Enterprise compiler is.) If you can get your hands on either an old Program Logic Manual, usually referred by its obvious acronym, as a PLM, or only a little less satisfactory, an old Execution Logic Manual, usually referred to for consistency as just an EL, for this compiler you will find lucid explanations of their implementation and use in either or both. The absence of this facility from C--Dennis Ritchie did not understand what controlled storage was for--is the reason for all the ugliness of multiple copies of writable static in C. John Gilmore Ashland, MA 01721-1817 USA _________________________________________________________________ Your E-mail and More On-the-Go. Get Windows Live Hotmail Free. http://clk.atdmt.com/GBL/go/201469229/direct/01/ ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
