"IBM Mainframe Assembler List" <ASSEMBLER-LIST@LISTSERV.UGA.EDU> wrote on 11/09/2023 12:54:36 PM: > > But in addition to up to 4K, you can actually > > do up to +/- 65K. > OK, so the "normal" relative jump is the signed, 16-bit variety > mentioned (15-bit relative target with left-most bit as the direction). > How is that +/- 65K? Wouldn't that be +/- 32K?
Ah! I see! A little reading revealed that the 16-bit relative target is not one-for-one but is the number of halfwords added or subtracted from the current address location. That would double the range from a literal +/-32K to an actual +/-64K range. Thanks! ;-) Sincerely, Dave Clark -- int.ext: 91078 direct: (937) 531-6378 home: (937) 751-3300 Winsupply Group Services 3110 Kettering Boulevard Dayton, Ohio 45439 USA (937) 294-5331 ********************************************************************************************* This email message and any attachments is for use only by the named addressee(s) and may contain confidential, privileged and/or proprietary information. If you have received this message in error, please immediately notify the sender and delete and destroy the message and all copies. All unauthorized direct or indirect use or disclosure of this message is strictly prohibited. No right to confidentiality or privilege is waived or lost by any error in transmission. *********************************************************************************************