8086 (was Re: more talking to the press.)

From: Sean 'Captain Napalm' Conner <spc_at_conman.org>
Date: Sat Nov 15 19:40:12 2003

It was thus said that the Great Fred N. van Kempen once stated:
>
> On Sat, 15 Nov 2003, Fred Cisin wrote:
>
> > Wasn't presence/absence of that bug one of the tests for presence of the
> > NEC V30 v intel 8086?
> Yes, we had this in Minix to test for V30/X86. Cant member what
> the V20/X88 was, probably a missing opcode.

  I don't think there were any opcode difference between the 8086 and 8088,
but there was a prefetch queue length difference that was easily testable
with some self-modifying code.

  -spc (Was able to slap a V20 in my PCjr to get about a 10% increase in
        speed ... )
Received on Sat Nov 15 2003 - 19:40:12 GMT