Additional Pictures 


This TI-1798 Desktop Calculator was manufactured in September 1990 by 
Inventec Corporation in Taiwan (Date code I-0990 mth 09 yr 1990).

The TI-1798 manufactured in Taiwan is powered by 4 solar cells and misses the backup battery .

Close-up view of the Toshiba T9731BU single-chip calculator circuit.

 Close-up view of the PCB-Mark of a TI-1798.

horizontal rule

If you have additions to the above article please email:

Joerg Woerner, March 21, 2020. No reprints without written permission.