linux-kernel - Re: Math-emu kills the kernel on Athlon64 X2

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Date:	Tue, 19 Sep 2006 14:28:08 +0200
From:	Krzysztof Halasa <khc@...waw.pl>
To:	sergio@...giomb.no-ip.org
Cc:	Jesper Juhl <jesper.juhl@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	billm@...bpc.org.au, billm@...urbia.net
Subject: Re: Math-emu kills the kernel on Athlon64 X2

Sergio Monteiro Basto <sergio@...giomb.no-ip.org> writes:
> I think, math emulation is for 486 and older. 486 DX2 was the first one
> who have math co processor, on earlier processor it should be disable .

Actually, 486 DX had built-in FPU as well. It was missing from 486SX
(486SX + optional 487 FPU = 486DX).

For 386(DX|SX) there were 387(DX|SX) (386SX used 16-bit bus).

Many 32-bit motherboards had a socket for Weitek (3167 for 386DX or 4167
for 486). I think I remember a board with 386DX and 287 socket as well.

486DX2 meant the external clock was half the internal.
-- 
Krzysztof Halasa
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