Additional Pictures 


 This early TI-57 II manufactured in
Taiwan hides the Slave microcomputer
and makes use of a rigid PCB.

The TP0456 microcomputer based Master/Slave architecture found in the
 TI-57 II calculator. The CD4572 forms the Master, the smaller CD4555 the Slave.

The TI-53 calculator makes use of the original TP0323 microcomputer 
introduced already in 1978.

If you have additions to the above article please email:

Joerg Woerner, June 13, 2003. No reprints without written permission.