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DATAMATH CALCULATOR MUSEUM |
TI-92 Expansion Port
The
TI-92 introduced early in 1996 featured a small
Expansion Port on the backside of its housing. With the complete address- and
data-bus of the M68000 compatible CPU available, upgrades of both the Operating
System and user memory capacity were made easy.
TI-92 E module

The
TI-92 E module was introduced early in 1996 and added the choice of 5 user languages (English, French, German, Italian
and Spanish) and an additional 128k User memory. The printed circuit board (PCB)
of the module contains only two integrated circuits:
| ROM: IEC98959-96081 | |
| RAM: 128k*8 TC551001B |

The
TI-92 II module was introduced early in 1996 and added the choice of 5 user languages (English, French, German, Italian
and Spanish) and an additional 128k User memory. The printed circuit board (PCB)
of the module contains only two main integrated circuits:
| Flash-ROM: 2M*8 LH28F016S | |
| RAM: 128k*8 TC551001B |

The
TI-92 Plus module was announced November 7, 1997 but available mid-1998 for
about $75. It boosted the TI-92 with the
enhanced Flash-technology into an user-upgradable calculator. Compared with the
pre-programmed Operating Systems of both the TI-92 and TI-92 II the Flash-memory
of the TI-92 Plus module could be re-programmed by the user with a simple
download cable connected to a personal computer. The printed circuit board (PCB)
of the module contains two main integrated circuits:
| Flash-ROM: 2M*8 LH28F016S | |
| RAM: 128k*8 TC551001B |
It took another year before the real TI-92
Plus calculator was introduced.
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If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, June 8, 2003. No reprints without written permission.