HCLSAL is indeed provided and maintained with source code (ASSEMBLE), on MAINT's 194 disk. It obtains the LOADPARM from a call to HCPGLPRM (HCPGLP), for which source code is not readily available.
It is possible that if one spent the time (on my To Do list) to download the Restricted Source Code (as documented in the z/VM installation materials), some form of HCPGLP source code may be available, perhaps in PL/X or another restricted language. So it depends more on the reason you need to know from where you can get the LOADPARM. If you can call HCPGLP the way that HCPSAL does, you're good to go. Mike Walter Hewitt Associates The opinions expressed herein are mine alone, not my employer's. Jeff Gribbin <jeff.grib...@gmail.com> Sent by: "The IBM z/VM Operating System" <IBMVM@LISTSERV.UARK.EDU> 09/28/2010 08:48 AM Please respond to "The IBM z/VM Operating System" <IBMVM@LISTSERV.UARK.EDU> To IBMVM@LISTSERV.UARK.EDU cc Subject How is LOADPARM obtained? Academic question that does not appear to be answered in Principles of Operation - can anyone help? Principles of Operation doesn't seem to mention how a program (operating system), 'reads' the loadparm - and CP Commands and Utilities (IPL command) isn't very helpful either ... <snip> The load parameter may be retrieved by the guest operating system during its IPL sequence. <snip> Of course, by asking if anyone knows, I realise that I've leaving myself open to fully justified, 'RTFC' (Read The Code) comments (is SAPL source-maintained?) but ... does anyone know? (A pointer to the relevant documentation would be ideal, but I'll settle for any reasonable explanation.) With thanks (again) in anticipation. Jeff The information contained in this e-mail and any accompanying documents may contain information that is confidential or otherwise protected from disclosure. If you are not the intended recipient of this message, or if this message has been addressed to you in error, please immediately alert the sender by reply e-mail and then delete this message, including any attachments. Any dissemination, distribution or other use of the contents of this message by anyone other than the intended recipient is strictly prohibited. All messages sent to and from this e-mail address may be monitored as permitted by applicable law and regulations to ensure compliance with our internal policies and to protect our business. E-mails are not secure and cannot be guaranteed to be error free as they can be intercepted, amended, lost or destroyed, or contain viruses. You are deemed to have accepted these risks if you communicate with us by e-mail.
