Two Alan's, one is right, the other... There were APs and MPs, Attached Processors, Multi Processors. Ages ago, I explained both in a course and the difference was that the second processor in an AP config couldn't perform I/O; on an MP, both could perform I/O, but each only to the channels it had.
2009/12/14 Alan Altmark <alan_altm...@us.ibm.com> > On Monday, 12/14/2009 at 01:24 EST, Alan Ackerman > <alan.acker...@earthlink.net> wrote: > > I'm sorry, Sir Alan, but there really were "AP" (Attached Processor) > mode > > ls in which the base > > processor could do I/O and the attached processor could not. the IBM > 3033 > > AP was one such > > model. See > http://www-03.ibm.com/ibm/history/exhibits/3033/3033_TR03.html > > , for example. > > To quote from the same article: "The 3033 host processor incorporates up > to 16 data communication channels, which are used by both processors to > reach the system's peripheral devices -- printers and displays, for > example. Control of these channels may be switched from the host to the > attached processor." > > Sir Alan, this seems to contradict you and support my statement, but I > will grant you that it is IBM-speak and may not mean precisely what it > says. :-) > > > No doubt this was before you were born. > > I wish. Then my joints wouldn't ache so much... ;-) > > Alan Altmark > z/VM Development > IBM Endicott > -- Kris Buelens, IBM Belgium, VM customer support
