Spectre & Meltdown

jim stephens jwsmail at jwsss.com
Thu Jan 4 14:44:21 CST 2018

On 1/4/2018 12:34 PM, Ed Sharpe via cctalk wrote:
> what about  xenon processors??
> ed#
> In a message dated 1/4/2018 1:18:14 PM US Mountain Standard Time, cctalk at classiccmp.org writes:
There is no difference between them and any other intel x86 or x64 
processor as far as the flaw involved.

Though they are not mentioning it, I suspect one can target P3 and P4 
equally well with the exploit.  It has been around that long.
> ----- Original Message -----
> From: "Warner Losh via cctalk" <cctalk at classiccmp.org>
> To: "Murray McCullough" <c.murray.mccullough at gmail.com>; "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
> Sent: Thursday, January 04, 2018 1:05 PM
> Subject: Re: Spectre & Meltdown
>> On Thu, Jan 4, 2018 at 11:00 AM, Murray McCullough via cctalk <
>> cctalk at classiccmp.org> wrote:
>>> This may be off-topic but these latest uprocessor exploits has raised
>>> a question: Are the 'old/classic' uprocessors using x86 technology in
>>> the same boat? The very earliest ones, i.e., 1970s and early 80's.
>>> probably not. How many are actually in use and/or on the Net?
>> I've seen it reported, but haven't verified, that this bug extends about 20
>> years back in the past to the Pentium Pro/Pentium II class of machines. If
>> I read that correctly, there's only two generations of Pentium not
>> affected, the P54C and P55C, the former of F00F fame... 386 and 486 CPUs
>> apparently aren't affected since they didn't have speculative execution.
>> The 8088/8086/80186/80286 presumably are also immune... If you extend
>> things further back, CP/M on Z80/8080 is also fine, but I don't think those
>> are properly x86 :)
>> Warner
> --------
> Finally, an excuse to use all those old 486 boxes...
> m

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