Subject: Re: AMD 586 dx4 133 support
To: Jason Thorpe <>
From: Michael L. VanLoon -- <>
List: port-i386
Date: 09/10/1996 19:20:49
>On Tue, 10 Sep 1996 16:33:59 -0500 
> "Phil Knaack" <> wrote:

> > 	I am about to purchase an AMD 5x86 dx4 133 chip on a pretty generic
> > motherboard. 
> > 	Will NetBSD work on it, and if so, will it use the chip-specific
> > enchancements? I don't know what they are, but I assume there are some.

>A friend runs NetBSD on an AMD 5x86 ... it's important to note that it 
>seems to behave like a 486, just much faster.  (i.e. it appears as a 
>486-class CPU).

It *IS* a 486.  It just has a 16KB write-back cache (normal 486s are
8KB write-through) and can be run 4x clock, where "normal" 486s are

>I'm not really certain what, if any, chip specific enhancements there are.

There they are, in all their glory. :-)

I ran one for a few months.  It worked fine.  Be aware that it's a
3.3-volt part, and if you're plugging it into an old motherboard, you
may need a 5v-3v converter.

  Michael L. VanLoon                 
        --<  Free your mind and your machine -- NetBSD free un*x  >--
    NetBSD working ports: 386+PC, Mac 68k, Amiga, Atari 68k, HP300, Sun3,
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