Duh! I don't write much assembler these days.
Charles -----Original Message----- From: IBM Mainframe Assembler List [mailto:ASSEMBLER-LIST@LISTSERV.UGA.EDU] On Behalf Of Bernd Oppolzer Sent: Thursday, May 20, 2021 3:44 PM To: ASSEMBLER-LIST@LISTSERV.UGA.EDU Subject: Re: Macro to set a bit string O changes the register, not the storage operand, so if you want to do it this way, you would have to do O, followed by ST. (same goes for N, X). similar to A, S, interesting problems with M and D
