Jeffrey D. Smith wrote:
I am wondering what is the oldest machine that supports the PLO (Perform Locked Operation) instruction, and whether there are any older machines that are still running supported versions of MVS (aka OS/390, z/OS)?
PLO is part of the original Architectural Level Set -- guaranteed to be present on G2 and higher machines with all hardware maintenance applied. OS/390 V2R10 was the first operating system to require the ALS. That operating system is no longer in service. -- ----------------------------------------------------------------- | Edward E. Jaffe | | | Mgr, Research & Development | [EMAIL PROTECTED] | | Phoenix Software International | Tel: (310) 338-0400 x318 | | 5200 W Century Blvd, Suite 800 | Fax: (310) 338-0801 | | Los Angeles, CA 90045 | http://www.phoenixsoftware.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
