[A89] Re: 68K Guide
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[A89] Re: 68K Guide
I was really wondering about if the Pentium I and Pentium II had any
instruction changes throughout.
----- Original Message -----
From: <jorma.oksanen@aina.fi>
To: <assembly-89@lists.ticalc.org>
Sent: Thursday, June 12, 2003 3:44 AM
Subject: [A89] Re: 68K Guide
> On 12 Jun 2003 at 2:37, Nick Peaden wrote:
>
> > Hmm... I wonder if the assembly code is the same across the late
processor
> > classes?
>
> 80x86 series is backwards compatible just like 680x0, newer processors
have
> new commands but all the rest are still there. There are some exceptions
> like 68010 and later made 'MOVE SR,' supervisor instruction and 6040 and
> 68060 dropped transcedental functions from floating point core. Intel
> made some changes too, but I'd guess that latest processors run 99% of
> 8086 code. IIRC 8086 ran 8080 code, so even the newest processors are
> hindered because od 30-year old design.
>
>
> Jorma
>
>
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