John can u pass James Antognini article ? John Krew <[EMAIL PROTECTED]> wrote:After reading up on cross-memory services (Extended Addressability Guide and the James Antognini article), I have the following questions:
1. Assuming I want to connect only selected address spaces to the service address space (via non-system LX): a. to execute the ATSET and ETCON macros in the user's address space (assuming the user runs in problem state) I will have to create an additional PC routine to check authorization and issue those macros on behalf of the user. b. that additional PC routine will have to be based on a system LX, otherwise I will enter a logical endless loop () c. in other words: I will need to reserve two LX's - one system, one non-system My question is: is this worth it? Is this the customary way of doing things? Or for economy's sake do people end up using a single system LX even for connection to selected address spaces (unless those selected address spaces are in supervisor mode)? 2. When I getmain a global area in common storage to save the cross-memory info (PC numbers, (dormant) system LX, etc.), in what key should I getmain it? What are the "safe" keys that people are accustomed to using? (I gather from earlier discussions on this list that key 8 is a no-no.) 3. The notion and purpose of an "EAX" (as opposed to a simple "AX") is not clearly elucidated in either of the above papers -- both more or less assume one already pretty much knows what it is and give it short shrift. Can anyone point me to a more precise presentation of the EAX, or, alternatively, briefly explain in this forum when and for what reason one would opt to reserve an EAX and specify it in the ETDEF macro? I am sure I will have some more questions but that's enough for now! Thanks, John Krew p.s. also cross-posted to Assembler Discussion List ---------------------------------------------------------------------- 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 __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ---------------------------------------------------------------------- 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
