Subject: Re: Prentium MMX for NetBSD-current
To: None <current-users@NetBSD.ORG>
From: D'Arcy J.M. Cain <>
List: current-users
Date: 01/17/1997 06:38:29
Thus spake Michael L. VanLoon --
> Yeah -- that's what I meant by "theoretically, anyway".  But that's
> just a minor quibble.  And it doesn't keep you from running NetBSD on
> a MMX chip if you don't specifically use the MMX features.

So is the command to turn MMX mode on a protected one?  If so then you
can't use it from a user program anyway and will always need OS support
for it.  If not then a user can turn it on and mess up an OS that
doesn't know that there is another piece of state to save.  Sounds
to me like you either use an MMX aware OS or you don't use the MMX
chip at all.  Or am I missing something?

D'Arcy J.M. Cain                           |  Democracy is three wolves
darcy@{|}                  |  and a sheep voting on         
+1 416 943 5281     (DoD#0082)    (eNTP)   |  what's for dinner.
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