There are quite a few "secret" instructions, meaning what they do and how they do it is not published in any generally available document. But if you have a real need to know, and can make a strong business case for how beneficial it will be to IBM to sell you the doc for that one instruction, they will gladly do so at an astonishingly high price after you and your lawyers sign non-disclosure agreements. The trick is to know in advance that the instruction exists and something about what it does. Think of the USA's Freedom of Information Act.
Bill Fairchild ----- Original Message ----- From: "John Chase" <[email protected]> To: [email protected] Sent: Wednesday, July 16, 2014 12:38:48 PM Subject: "Secret" Machine Instruction? Hi, List, While browsing around looking for something else, I noticed in an IBM-supplied load module the following sequence at the entry point: 90EC D00C 188D E3D0 021C 0017 WTH is 'E3D0' ?? It seems to be missing from the "List of Instructions by Op Code" in the 10th edition of z/Architecture Principles of Operation, published September 2012. TIA, -jc- ********************************************************************** Information contained in this e-mail message and in any attachments thereto is confidential. If you are not the intended recipient, please destroy this message, delete any copies held on your systems, notify the sender immediately, and refrain from using or disclosing all or any part of its content to any other person. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
