Steve, You are probably correct, but as said before... the 24's & 31's will not have access to the shared storage, and depending on the % mix of your 31/24/64 bit programs it might defeat the purpose of the exercise to share the storage above the line if you need it below too?
Herbie -----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Steve Samson Sent: 06 November 2007 16:09 To: [email protected] Subject: Re: CSA 'above the bar' It's the peril of upward compatibility. If no one took a 24-bit or 31-bit program and bound it in AMODE 64, there would be no problem. Who's willing to take that bet? Steve R.S. wrote: >> >> Correct. For an amode24 program, the entire universe ends at address >> x'00FFFFFF'; the "next step" wraps back to x'00000000'. So for an >> amode24 program, there is nothing "above the line" or "above the bar" >> because for it, there is neither a "line" nor a "bar". > > That's also my understanding. > So, again, why 24-bit programs could be a reason for 2-4G hole ? > > ---------------------------------------------------------------------- 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 Elavon Financial Services Limited Registered in Ireland: Number 418442 Registered Office: Block E, 1st Floor, Cherrywood Business Park, Loughlinstown, Co. Dublin, Ireland Directors: Robert Abele (USA), John Collins, Terrance Dolan (USA), Pamela Joseph (USA), Declan Lynch, John McNally, Malcolm Towlson Elavon Financial Services Limited, trading as Elavon, is regulated by the Financial Regulator ---------------------------------------------------------------------- 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
