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Additional Pictures 

 

The TI-81 Engineering Sample with
ROM-Version 1.0 manufactured April 1990.

An early TI-81 w/o backup battery with
ROM-Version 1.1K manufactured September 1990.

An early TI-81 VSC w/o backup battery with
ROM-Version 1.1 manufactured in 1991.

A late TI-81 w/o backup battery with
ROM-Version 1.6K manufactured September 1991.

A later TI-81 with backup battery with
ROM-Version 1.8K manufactured November 1992.

 

 

A later TI-81 with backup battery with
ROM-Version 2.0V manufactured August 1994.

A late TI-81 with backup battery with
ROM-Version 2.0V manufactured April 1996.


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

Joerg Woerner, January 27, 2009. No reprints without written permission.