campbell@redsox.UUCP (Larry Campbell) (03/28/89)
In article <18250@gatech.edu> ken@gatech.UUCP (Ken Seefried iii) writes: }In article <9989@ihlpb.ATT.COM> gregg@ihlpb.ATT.COM (Wonderly) writes: }>From article <18227@gatech.edu>, by ken@gatech.edu (Ken Seefried iii): }>> In article <2863@daisy.UUCP> david@daisy.UUCP (David Schachter) writes: } }[me wondering out loud about what the 80286 was designed for] } }>Multics comes to mind... 64K segments, 4 access levels, transfer }>gates... } }I thought about that, but it is my understanding (which surely could }be wrong) that multics is based on dynamicly allocated, variable size }segments of potentially large size. Certainly, the 80286 doesn't fit }this criteria with its fixed size, 64K segments. Also, doesn't }Multics use more than 4 rings of protection? Multics segments were limited in size to 256K 36-bit words. In the 1960s, that seemed like a lot. These days it seems pretty puny. Of course, it's still a heck of a lot bigger than 64K bytes. -- Larry Campbell The Boston Software Works, Inc. campbell@bsw.com 120 Fulton Street wjh12!redsox!campbell Boston, MA 02146