mike.a.sch...@gmail.com (Mike Schwab) wrote: >Well, XA+ machines only supported 4K pages / 1M segments and not 2K
>pages / 64K segments. Then DAS and Access register additions. The >43xx series only supported a single virtual address space, like >DOS/VSE. 3090s were the only processors to support Vector >instructions, and op codes were re-used in z series. What does this mean, "a single virtual address space"? VM ran fine on it, with many virtual address spaces. Are you perhaps thinking of V=R/V=F? I disremember whether 43xx supported those. ...phsiii P.S. "zSeries" (RIP) ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
