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- Newsgroups: comp.sys.intel
- Path: sparky!uunet!mcsun!sunic!aun.uninett.no!ugle.unit.no!alkymi.unit.no!robert
- From: robert@alkymi.unit.no (Robert Schmidt)
- Subject: Re: 486 programming
- Message-ID: <1993Jan25.123508.28661@ugle.unit.no>
- Sender: news@ugle.unit.no (NetNews Administrator)
- Organization: Norwegian Institute of Technology
- References: <ssuchalr.727702732@reading> <1993Jan22.223208.26443@crd.ge.com>
- Date: Mon, 25 Jan 93 12:35:08 GMT
- Lines: 27
-
- In article <1993Jan22.223208.26443@crd.ge.com>, davidsen@ariel.crd.GE.COM (william E Davidsen) writes:
- > In article <ssuchalr.727702732@reading>, ssuchalr@csug3.cs.reading.ac.uk (S. J. Chalker) writes:
- >
- > | I am an assembly language programmer used to programming an 8086. I recently
- > | purchased a 486 computer and now wish to take full advantage of its powers.
- > | I am looking for a book on the subject of programming the 486. Or will a book
- > | on the 386 do, and if not, what is the difference from the assembly language
- > | programers view?
- >
- > The instructions are the same in user mode, although there are a few
- > status flags which are different, I believe. There are a few additional
- > quirks in the 486, but the big difference is timing, which makes one
- > instriction sequence faster on the 386, and another on the 486.
- >
- > I would look for a 486 manual to be sure.
- >
- > --
- > bill davidsen, GE Corp. R&D Center; Box 8; Schenectady NY 12345
- > Keyboard controller has been disabled, press F1 to continue.
-
- There are a couple of new 486 specific instructions, but nothing that
- can't be implemented with 2 or more 386 instructions. The intent is to
- make it possible to update semaphores in multi-programming systems on the 486
- in one uninterruptable instruction.
-
-
- robert
-