DATA in OS/VS1 and SVS provided fragmentation relief even though there was only a single address space. Your program could do a getmain for a large array and never tie up page frames beyond the part that it actually used. Think sparse arrays.
-- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Assembler List <ASSEMBLER-LIST@LISTSERV.UGA.EDU> on behalf of Steve Smith <sasd...@gmail.com> Sent: Friday, November 8, 2019 3:34 PM To: ASSEMBLER-LIST@LISTSERV.UGA.EDU Subject: Re: Prefixing (was Questionable Instructions in Obtaining EAX documentation) I've seen nothing but technical posts (exc. the last), that have been perfectly civil. I can't imagine what awoke your curiosity. As for memory fragmentation relief, that's a secondary effect of virtual memory providing more address space(s). While that is important, I like Don's two fundamental raison d'etres for virtual memory (or DAT). sas On Fri, Nov 8, 2019 at 2:57 PM Keven <k...@k3n.us> wrote: > > > > > Just curious; are we being made party to some sort of feud and/or > ongoing disgruntlement between subscribers DG and SM? If so please cease > forthwith and desist any further public airing of your grievances on this > forum. > KH > > > > > > > > > > > On Fri, Nov 8, 2019 at 11:38 AM -0600, "Dan Greiner" <dan_grei...@att.net> > wrote: > > > > > > > > > > > Apologies, Seymour. I really knew better, but some muscle memory > machine-check must have occurred. > -- sas
