> -----Original Message----- > From: IBM Mainframe Discussion List > [mailto:[EMAIL PROTECTED] On Behalf Of Rick Fochtman > Sent: Thursday, June 26, 2008 3:25 PM > To: [email protected] > Subject: Re: Op codes removed from z/10 > > -------------------------------<snip>-------------------------- > > > MVS use of the SVC assist was removed in MVS/ESA SP3.1.0 > > MVS use of the lock assists was removed in OS/390 2.10. > > > > > ------------------------------<unsnip>----------------------------- > At the risk of a "Stupid Question", why ??
I was curious about that too. It could be as simple as "the current systems are so fast that maintaining the microcode and the microcode space is no longer cost effective." From what I gather, things which can be done using "normal" instructions are put into the microcode only when the speed up makes it worth while. -- John McKown Senior Systems Programmer HealthMarkets Keeping the Promise of Affordable Coverage Administrative Services Group Information Technology The information contained in this e-mail message may be privileged and/or confidential. It is for intended addressee(s) only. If you are not the intended recipient, you are hereby notified that any disclosure, reproduction, distribution or other use of this communication is strictly prohibited and could, in certain circumstances, be a criminal offense. If you have received this e-mail in error, please notify the sender by reply and delete this message without copying or disclosing it. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
