On Thu, 20 Jul 2006 10:45:37 -0400, Bruce Black <[EMAIL PROTECTED]> 
wrote:

>>
>> There are quite a few reasons, rather than just one single one. The
>> biggie IMO is that z architecture is demonically complex to implement in
>> silicon.
>It has always amazed me that IBM is able to put out a new processor
>every year or two with little or no hardware logic errors.  I know from
>articles in the technical journals that they do extensive testing, but
>heck, in the software industry, we do extensive testing and we STILL
>have to put out a significant number of fixes.  Kudos to the hardware
>developers!
>
I agree completely.  With nearly 700 instructions defined in the POO, it's 
amazing that there are not more problems.

Tom Marchant

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