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Additional Pictures 

 

This early Spell-Checkers RR-1  without date code was
manufactured by Inventec in Taiwan on or around April 1909.

 The printed circuit board (PCB) of the RR-1 Spell Checker RR-1 with a typcal micto-computer design centered
around a Z-80 compatitoble microprocessor, a huge OTP-ROM, a small RAM and an integrated display driver. 

The TMPZ84C00 microprocessor (CPU) manufactured end of 1988 by Toshiba.


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

Joerg Woerner, October 23, 2009.. No reprints without written permission.