On 9/1/2020 6:36 PM, Jesse 1 Robinson wrote:
As for a vanishing instruction, I once wrote some code using the Move Inverse (MVCIN) instruction, which greatly simplified scanning data for a terminating character. Apparently MVCIN was introduced on the 4341 (?) but not carried forward to subsequent models. So S0C1. A rude shock for a clever programmer looking for ingenious solutions.
MVCIN is a standard part of z/Architecture. We use it *heavily* for setting control block eyecatchers e.g.:
MVCIN CBlockEyeCatch,=C' ESSEJ'+5 Set eyecatcher to 'JESSE ' -- Phoenix Software International Edward E. Jaffe 831 Parkview Drive North El Segundo, CA 90245 https://www.phoenixsoftware.com/ -------------------------------------------------------------------------------- This e-mail message, including any attachments, appended messages and the information contained therein, is for the sole use of the intended recipient(s). If you are not an intended recipient or have otherwise received this email message in error, any use, dissemination, distribution, review, storage or copying of this e-mail message and the information contained therein is strictly prohibited. If you are not an intended recipient, please contact the sender by reply e-mail and destroy all copies of this email message and do not otherwise utilize or retain this email message or any or all of the information contained therein. Although this email message and any attachments or appended messages are believed to be free of any virus or other defect that might affect any computer system into which it is received and opened, it is the responsibility of the recipient to ensure that it is virus free and no responsibility is accepted by the sender for any loss or damage arising in any way from its opening or use. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
