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Reference Guides: Calculator CPUs/ICs
Information on the main processing ICs you will find in calculators
(just started developing this section, as I'm amazed there is no info on the web - lots more to come, March 2010)

 
ID
HD38401
HD384111A
M58344P
M58347P
M58893P
MDP1220C
T3241
uPD1801C