On 11/21/2016 04:17 PM, Charles Anthony wrote:
I was looking here:

http://bitsavers.informatik.uni-stuttgart.de/pdf/ibm/360/
fe/2020/Z33-1021-0_2020_Processing_Unit_FETOM_May68.pdf

(pdf) pages 45, 46 describe the ALU


I note that the cover page says: "(Machines with serial no. 50,000 and
above)."

Perhaps the ALU is only present on late model machines?

That would be a HUGE difference between different serial numbers, so I'd rather doubt it.

Jon

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