On Mon, 22 Feb 2010 13:19:37 -0500, Anne & Lynn Wheeler <l...@garlic.com> wrote:
>The following message is a courtesy copy of an article >that has been posted to bit.listserv.ibm-main,alt.folklore.computers as well. > > >gahe...@gmail.com (George Henke) writes: >> Yes, I believe it was some how connected to Preferred Machine Assist (PMA) >> where page 0 was actually owned by MVS not VM. > >preferred machine assist could be considered step on the way to LPARs >... since part of it involved the virtual machine pages being mapped to >fixed real storage. > >the earlier version of this (preferred V=R guest) had been done for >vm370 at the science center circa mid-70s on a "csc/vm" base. There was >then a joint study with AT&T ... -----------------SNIP---------------------------------------------- At Monsanto Europe in Brussels about 1976 I wrote some mods to VM/370 to defeat Shadow Page Tables for V=R machines so we could run MVS under VM/370 without a crippling overhead. I sent that code out into the world on some (Waterloo?) VM Mods tape, but my own copy got dumped in some move down the years. Wish I had it now, it would go really nicely on Herc. DC ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
