[rescue] AS/400 question

Dave McGuire mcguire at neurotica.com
Thu Jun 5 16:42:45 CDT 2003

   Ahh, found that AS/400 PPC processor info in "Exploring IBM AS/400 
computers" by Hoskins and Dimmick (Maximum Press, 1998).  The RISC 
AS/400 processors are called "PowerPC AS":

   "PowerPC AS microprocessors have several unique features not found in 
the base PowerPC architecture (decimal support, move assist, vectored 
supervisory calls, tagged operations, etc).  These extensions help 
RISC-based AS/400 systems maintain and enhance commercial transaction 
performance.  Commercial computing workloads have different 
characteristics than engineering/scientific computing workloads (a 
traditional strength of RISC)."

   The PowerPC AS microprocessor family consists of:

   A10 - single-chip 77MHz superscalar, 231 MIPS, 4KB instruction cache, 
8KB data cache, optional 1MB L2 cache.

   A30 - seven-chip (!) 154MHz superscalar, 616 MIPS, 8KB instruction 
cache, 256KB data cache, 2- and 4-way SMP capable.

   A35 - single-chip 125MHz superscalar, 375 MIPS, 64KB instruction 
cache, 64KB data cache, 1MB or 4MB L2 cache.

   These sound like pretty beefy processors to me.


Dave McGuire             "I've grown hair again, just
St. Petersburg, FL           for the occasion."       -Doc Shipley

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