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Additional Pictures 

 

This TI Converter aka TI-1890 was manufactured in April 1983 in
Abilene, Texas (Date code ATA 1583).

This late TI Converter makes use of the CD4559A
single-chip calculator circuit.

The buggy CD4509 calculator chip found 
in an early TI Converter aka TI-1890.


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

Joerg Woerner, May 1, 2005. No reprints without written permission.