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- Newsgroups: comp.arch
- Path: sparky!uunet!spool.mu.edu!uwm.edu!linac!convex!finger
- From: finger@convex.com (Jay Finger)
- Subject: Re: Any new instructions in a i486?
- Message-ID: <1992Dec15.155425.25217@convex.com>
- Sender: usenet@convex.com (news access account)
- Nntp-Posting-Host: mikey.convex.com
- Organization: CONVEX Computer Corporation, Richardson, Tx., USA
- References: <edm.724366309@wrs.com> <1992Dec15.014650.24209@grebyn.com> <1992Dec15.042513.23969@gandalf.ca>
- Date: Tue, 15 Dec 1992 15:54:25 GMT
- X-Disclaimer: This message was written by a user at CONVEX Computer
- Corp. The opinions expressed are those of the user and
- not necessarily those of CONVEX.
- Lines: 15
-
- In article <1992Dec15.042513.23969@gandalf.ca> dperks@gandalf.ca (Dave Perks) writes:
- >Is it also possible that since the Intel 486 supports supervisor-mode write
- >protection, it is is used to allow something like copy-on-write? If NeXT Step
- >was designed to use this then the kernel would require fairly major changes.
-
- Yep, NeXTstep (and maybe Mach in general, somebody correct me if I'm wrong)
- uses copy-on-write all over the place. The programmers' references
- mention copy-on-write in many places (at least the 2.x documentation does,
- but that's for a 680[34]0).
-
- --
- ===============================================================================
- Jay Finger - finger@convex.com | Convex Computer Corp
- CONVEX System Integration and Support | 3000 Waterview Parkway
- Product Specialist | Richardson, TX 75080
-