On 6 Dec 2006 at 8:07, Dave Jones wrote:

> 8000     <---- machine check extended logout length

Take a look at:
http://listserv.uark.edu/scripts/wa.exe?A2=ind0404&L=vmesa-l&T=0&P=9555

Here is an excerpt:

> I think it is time to update our documentation.  :-)  QUERY CPUID gives
> you the result of STIDP with the high-order byte set to 0xFF.  The -02
> level of the z/Architecture Principles of Operation defines the result,
> including the FORMAT bit you are seeing.  It changes how you interpret the
> CPUID portion.
> 
> The low-order nibble hasn't been the length of the machine check extended
> logout area in ... a long time.
> 
> Alan Altmark
> Sr. Software Engineer
> IBM z/VM Development
-- 
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