Current field releases of z/OS do not turn on the clock-comparator sign control bit. z/OS 3.2 will be the first release that can turn it on (but only on test systems).
Jim Mulder -----Original Message----- From: IBM Mainframe Assembler List <ASSEMBLER-LIST@LISTSERV.UGA.EDU> On Behalf Of Jonathan Scott Sent: Saturday, April 12, 2025 1:13 PM To: ASSEMBLER-LIST@LISTSERV.UGA.EDU Subject: Re: Store-Clock-Fast Facility "When the multiple-epoch facility is installed in the configuration and the clock-comparator sign control is one, comparison follows the rules of signed binary arithmetic." Jonathan Scott
