=================================================== -----Original Message----- From: "Chase, John" <[EMAIL PROTECTED]> Sent: 7/17/2006 6:34 AM To: "IBM-MAIN@BAMA.UA.EDU" <IBM-MAIN@BAMA.UA.EDU> Subject: Re: z/OS level for SETFRR for AMODE(64)?
> -----Original Message----- > From: IBM Mainframe Discussion List On Behalf Of Binyamin Dissen > > On Sun, 16 Jul 2006 00:37:50 -0400 Jim Mulder wrote: > > [ snip ] > > :> ESTAEX has supported AMODE(64) since OS/390 2.10, and is > so documented. > > My mistake. I even have code that issues the ESTAEX in 64 bit. > > Interesting thing about the expansion is that it uses ALET > field to store the > 64 bit address. Looks like 64 bit dataspaces ain't a'coming. Why would you need one? =================================================== The point is a pointer field that can contain *either* a 64-bit main storage address *or* a 31-bit pointer/ALET, but not both. Ideally, the address portion should be 64-bits and the ALET portion should be 32-bits. What if the ALET is a reference to another address space 64-bit region? Then you need both. Also, having both 64-bit address and a 32-bit ALET lets the programmer write seamless AR mode code in AMODE(64). Jeffrey D. Smith Farsight Systems Corporation 24 BURLINGTON DR LONGMONT, CO 80501 303-774-9381 direct 303-709-8153 cell 303-484-6170 fax ---------------------------------------------------------------------- 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
