<< Previous Message Main Index Next Message >>
<< Previous Message in Thread This Month Next Message in Thread >>
Date   : Tue, 07 Jun 1983 1814-:00EDT
From   : Andrew Scott Beals <SJOBRG.ANDY%MIT-OZ@mit-mc>
Subject: Re: UNIX on the 68000

       From: goldfarb.ucf-cs@Rand-Relay

       Well, Andy, the page size on your beloved Vax is 1024.

I beg to differ. On pages 16 and 17 of the VAX Architecture Handbook, it
states:
       ``Virtual address space is diveded into @b(pages), where a page
         represents 512 bytes of contiguously addressed memory. The first
         page begins at byte 0 and continues to byte 511. The next page
         begins at byte 512 and continues to byte 1023, and so forth.''

.....on page 9 of the same book, it defines a byte as 8 bits. Sorry, Goldfarb.

You're probably confused because Bill Joy et al decided to use 1k file
system blocks (so of course, Berkeley unix swaps at this size, but the
VAX hardware itself thinks in 512byte pages.).

                                       VAX manuals in hand,
                                       -andy
<< Previous Message Main Index Next Message >>
<< Previous Message in Thread This Month Next Message in Thread >>