There are also fields which contain 24-bit addresses of these things, like RBLINKB, with no room to expand to 31 bits without moving the field. Moving the field would break all programs that use it, (including AMODE(31) and AMODE(64) programs).
Jim Mulder z/OS Diagnosis, Design, Development, Test IBM Corp. Poughkeepsie NY From: "Tom Marchant" <[email protected]> To: [email protected] Date: 04/29/2020 04:00 PM Subject: Re: S0F9 and SOFD ABENDs and SVC dumps - oh my! Sent by: "IBM Mainframe Discussion List" <[email protected]> On Wed, 29 Apr 2020 08:45:30 +0100, Martin Packer wrote: >As much to the point, why does this need to be 24-bit LSQA? Compatibility. TCBs and RBs are still below the line because moving them above the line will likely break existing AMODE(24) programs. -- Tom Marchant ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
