I'm pretty sure that is correct. -- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 עַם יִשְׂרָאֵל חַי נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר
________________________________________ From: IBM Mainframe Assembler List <ASSEMBLER-LIST@LISTSERV.UGA.EDU> on behalf of Mike Kerford-Byrnes <m...@hill-leys.com> Sent: Wednesday, December 11, 2024 8:33 PM To: ASSEMBLER-LIST@LISTSERV.UGA.EDU Subject: BXLE/BXH External Message: Use Caution I may be mistaken, but I do recall that IEFSD095 - the code that produced the Block letters for printout separator pages - used the same register for the operands in a BXLE??BXH to generate the block letters from a bit map coded inline. I also recall a rumour from someone who had found the source code that there were at least 2 pages of comments explaining the instruction operation. But it was a looooong time ago, and I may have "misremembered". Perhaps someone with access to the OS/360 source (Hercules project?) may be able to confirm/deny/modify. All corrections welcome, if only to repair crusty brain cells! Mike Kerford-Byrnes
