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Date:      Fri, 8 Mar 2002 02:43:09 -0800
From:      "Jesse Geddis" <sgeine@yahoo.com>
To:        "Toomas Aas" <toomas.aas@raad.tartu.ee>, <freebsd-questions@freebsd.org>
Subject:   RE: CPU type
Message-ID:  <NGBBKILMGLGEDIHMGJANGEPLCAAA.sgeine@yahoo.com>
In-Reply-To: <200203080905.g2895nv12613@lv.raad.tartu.ee>

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arse, well that explains then why it didn't work =) oh well, it
suffice as a name server which is all I had it doing anyway. I wish I
could remember how old this thing is. the BIOS date is 1992 or
1994ish. my main reason for wanting to force it into I586 was wanting
it to work in 32bit mode. if I remember correctly 486's were only 16
bit. according to AMD's website this thing is supposed to work in 8,
16, and 32 bit. I remember 486DX4's I had one back in the day but I
didn't remember those working at 32bit. I had never been to AMD's
website before because I've never bought an AMD (this laptop was a
gift when I was much younger) mainly because it wasn't until the last
year or so that AMD churned out multiprocessor capable equipment. I
found this white paper though. which is what I'm referencing.
http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_doc
s/19751.pdf

unfortunately, I'm not a chip guy, I'm a router engineer so roughly
80% of this document is nonsense to me. if I have my kernel configured
as I486 will I still have 32 bit support in the OS? I guess the
question is more or less moot since it won't boot any other way =)

Thanks for the response =)

-----Original Message-----
From: Toomas Aas [mailto:toomas.aas@raad.tartu.ee]
Sent: Friday, March 08, 2002 1:05 AM
To: Jesse Geddis; freebsd-questions@freebsd.org
Subject: Re: CPU type


Hi Jesse!

On  7 Mar 02 at 20:10 you wrote:

> I have an old canon innova notebook 360CD this is what dmesg reports
> about the CPU
>
> Timecounter "i8254"  frequency 1193182 Hz
> CPU: AMD Am5x86 Write-Back (486-class CPU)
>   Origin = "AuthenticAMD"  Id = 0x4f4  Stepping = 4
>   Features=0x1<FPU>
>
> the processor is an 5x86 AMD P75 working at 133mhz with a 486 BIOS
> from Phoenix. the P75 is what the bios reports during boot time.

AMD 5x86 *is* a 486 class CPU. You can think of it as 486dx4. Your CPU
works at 133 MHz (33 MHz FSB x 4). The "P75" is a marketing blurb
which
wants to tell you that this CPU is approximately as fast as Pentium
75.
--
Toomas Aas | toomas.aas@raad.tartu.ee |
http://www.raad.tartu.ee/~toomas/
* If you don't think women are explosive, drop one.


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