DATAMATH CALCULATOR MUSEUM
Texas Instruments TI-81 ViewScreen™ (1993)
|Date of introduction:||October 1993||Display technology:||LCD dot matrix|
|New price:||($120.00 in 2001)||Display size:||8 * 16 characters|
|Size:|| 6.8" x 3.1" x 0.85"
172 x 80 x 32 mm3
|Weight:||7.7 ounces, 218 grams||Serial No:|
|Batteries:||4*AAA||Date of manufacture:||year 1993|
|AC-Adapter:||Origin of manufacture:||Taiwan (I)|
|Precision:||13||Integrated circuits:|| CPU: Toshiba T6A43
Display: 2*T6A39, T6A40
|Program steps:||2,400 Bytes||Courtesy of:||Joerg Woerner|
Texas Instruments changed in 1993, together with the introduction of the TI-82, the design of the TI-81 slightly. Please notice the position of the TI-logo, it moved from the upper right position to the upper left of the screen.
The TI-81 ViewScreen is the teacher version of the standard TI-81. It connects with a special port permanently to a ViewScreen panel via a flat-ribbon cable. Placing the panel on the overhead projector enlarges the image of the handheld screen so that each student can follow along. From a technical point of view the TI-81 VSC is almost identical with the students TI-81. The main difference you notice is a two piece bottom shell of the calculator housing to accommodate the ViewScreen electronics.
Dismantling the TI-81 VSC reveals a small printed circuit board (PCB) with one driver chip connected in a piggy back manner to the display board of the calculator. The main electronics of the TI-81 VSC is identical with the students model TI-81. Don't miss the similar TI-85 ViewScreen connected to the first generation TI-85 VSC.
Texas Instruments revised the concept of the ViewScreen in 1994 and even 15 years later were four ViewScreen panels available:
|• Panel 1:
TI-73 VSC, TI-73 Explorer VSC,
TI-82 VSC, TI-83 VSC,
TI-83 Plus VSC, TI-83 Plus Silver Edition VSC, TI-84 Plus VSC,
TI-84 Plus Silver Edition VSC
• Panel 2: TI-89 VSC, TI-89 Titanium VSC, TI-92, TI-92 Plus, Voyage 200
• Panel 3: TI-85 VSC (2nd design), TI-86 VSC
• Panel 4: TI-Nspire, TI-Nspire CAS, TI-Nspire Touchpad, TI-Nspire CAS Touchpad
As an alternative the TI-Presenter video adapter connects to a
TV or other projection device with a video input port.
You can check the ROM version of your TI-81
VSC using the following key sequence and reading the number on your screen:
[2nd] [TEST] [ALPHA] [S]
Information provided by ticalc.org
and Xavier Andréani.
The TI-81 is permitted (as of September 27, 2007) for use on SAT, ACT, PSAT and AP exams.
If you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, June 7, 2020. No reprints without written permission.