DATAMATH CALCULATOR MUSEUM
Texas Instruments TI-73 ViewScreen™ (Engineering Sample)
|Date of introduction:||1998||Display technology:||LCD dot matrix|
|New price:||$150.00 (SRP 2008)||Display size:||8 * 16 characters|
|Size:|| 7.2" x 3.2" x
182 x 81 x 24 mm3
|Weight:||6.6 ounces, 186 grams||Serial No:|
|Batteries:||4*AAA + CR1620 (35mA)||Date of manufacture:||mth 01 year 1998|
|AC-Adapter:||Origin of manufacture:||Taiwan (I)|
|Precision:||14||Integrated circuits:|| CPU: Zilog Z84C0008
ASIC: TI REF 9815455
Display: Toshiba T6A04
Display: Toshiba T6A04
|Program steps:||25k Bytes, 218k Bytes Flash ROM||Courtesy of:||Xavier Andréani|
TI-73 ViewScreen Calculator (VSC) Prototype carries on the backside a label
"Engineering Sample" but is otherwise identical with the
Four ViewScreen panels were available in 2008:
|• 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.
a technical point of view the TI-73 VSC is almost identical with the students
TI-73. The main difference you notice is a bulgier bottom shell of the
calculator housing to accommodate the ViewScreen electronics and connector.
Dismantling the TI-73 VSC reveals a small printed circuit board (PCB) with two driver chips connected with a flexible cable to the display PCB of the calculator.
Disassembling this TI-73 VSC Engineering Sample manufactured in January 1998 by Inventec Corporation in Taiwan reveals the original design of the TI-73 using 5 main Integrated Circuits:
|• Zilog Z84C00 microprocessor
• TI REF 9815455 ASIC
• 512k Bytes Flash ROM
• 32k Bytes RAM
• Toshiba T6A04: Single-chip 64*120 pixel display driver
Please notice the additional 5-pin Integrated Circuit mounted with double-tape on the ASIC package and connected with various "blue wires" tot the circuity.
1.60 (December 16, 2001)
You can check the ROM version of your TI-73
VSC using the following key sequence and reading the number on your screen:
[2nd] [MEM] 
Information provided by ticalc.org
and Xavier Andréani.
The TI-73 VSC is permitted (as of May 30, 2013) for use on SAT,
and AP exams but
is not recommended for the AP exam.
If you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, May 31, 2013. No reprints without written permission.