Aucbvax.4888 fa.editor-p utzoo!decvax!ucbvax!editor-people Sun Nov 1 22:14:12 1981 Re: Small Address Space >From RMS@MIT-AI Sun Nov 1 22:03:07 1981 Operating systems that do paging have special equipment designed to make it both invisible and efficient. Hand-simulating paging is a real pain even though it is no fundamental problem. Most people agree with this; that is why they want machines with bigger address spaces rather than rushing to simulate the bigger address space in the user program. If you think that hand-simulated paging is as good as having it done invisibly by the system, you're welcome to write all your programs for 11-90's which support 32 megabytes (but can only access 64k at a time) and switch your page maps by hand. Remember that each switch will require a system call. If you already know that an editor can use a large address space, that's good. Most people are not aware of this. Many think that a PDP-11 address space would be perfectly sufficient for the editor PROGRAM. Perhaps people on EDITOR-PEOPLE are more aware of this than the programming public. ----------------------------------------------------------------- gopher://quux.org/ conversion by John Goerzen of http://communication.ucsd.edu/A-News/ This Usenet Oldnews Archive article may be copied and distributed freely, provided: 1. There is no money collected for the text(s) of the articles. 2. The following notice remains appended to each copy: The Usenet Oldnews Archive: Compilation Copyright (C) 1981, 1996 Bruce Jones, Henry Spencer, David Wiseman.