DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Texas Instruments TI-81
| Date of introduction: | 1993 | Display technology: | LCD dot matrix |
| New price: | $110 | Display size: | 8 * 16 characters |
| Size: | 6.8" x 3.1" x 0.85" | ||
| Weight: | 5.6 ounces | Serial No: | 14020100 |
| Batteries: | 4*AAA + CR1620 | Date of manufacture: | mth 02 year 1994 |
| AC-Adapter: | Origin of manufacture: | Taiwan | |
| Precision: | 13 | Integrated circuits: | CPU: Toshiba T84C00 ASIC: Toshiba TC14C010 ROM: LH5359©93 RAM: SRM2264 Display: T6A04 |
| Memories: | 0-27 | ||
| Program steps: | 2400 Bytes | Courtesy of: | Joerg Woerner |
Compared
with the original TI-81 the later production changed the
internal construction. Instead the three Quad-Flat-Pack chips of the first run
this one uses only one small circuit directly attached to the flexible printed
circuit board (PCB).
Even
the main printed circuit board was changed and looks identical to the PCB found
in the TI-82. Instead the Toshiba T6A43 - an application
specific Z80 controller - it accomodates now with the T84C00 a standard Z80 CPU
with an additional ASIC TC14C010.
Texas
Instruments changed in 1995 the design of the TI-81, TI-82 and
TI-85 slightly,
please notice the position of the TI-logo and the color of the type designator.
ROM-Versions:
1.1
2.0
You can check the ROM version of your TI-81 using the following key sequence and reading the number on your screen:
