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Additional Pictures 

 

This Montgomery Ward electronic P800 calculator aka TXI-8642A was manufactured
in 1973 by Texas Instruments.

The internal construction of the boxy Montgomery Ward TXI-8642A looks very solid.

The Montgomery Ward TXI-8642A relies on
Texas Instruments technology for the keyboard,
display drivers and display.

The printed circuit board (PCB) of the Montgomery
Ward TXI-8642A makes use of a TMS0103 or 
TMS0109 single-chip calculator circuit.


If you have additions to the above article please email: joerg@datamath.org.

Joerg Woerner, January 28, 2006. No reprints without written permission.