> -----Original Message----- > From: IBM Mainframe Assembler List [mailto:ASSEMBLER- > [email protected]] On Behalf Of Tony Harminc > Sent: Tuesday, August 31, 2010 12:05 PM > To: [email protected] > Subject: Re: Number of added instructions? > > On 31 August 2010 11:23, John P. Baker <[email protected]> wrote: > > > The original IBM 360 had 142 (documented) instructions, of which 11 were > privileged. > > > > All of the original non-privileged instructions remain available. > > > > Of the privileged instructions, 5 remain available. The 6 that have > been > > dropped consist of 4 comprising the S/360 I/O feature and of 2 > comprising > > the S/360 Direct Control feature. > > I think a few more than 6 of the old privops have gone. SSK/ISK and > RRB come to mind, and there are more than 4 I/O instructions that have > disappeared, even if you count pairs like HIO/HDV and SIO/SIOF as just > one each.
And don't forget the Vector Facility instructions that have also disappeared or been replaced by newer instructions. Peter -- This message and any attachments are intended only for the use of the addressee and may contain information that is privileged and confidential. If the reader of the message is not the intended recipient or an authorized representative of the intended recipient, you are hereby notified that any dissemination of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail and delete the message and any attachments from your system.
