DATAMATH CALCULATOR MUSEUM
Texas Instruments TI-2800 Paperless Printer
|Date of introduction:||1987||Display technology:||LCD|
|New price:||$65.00 (SRP 1988)||Display size:||8 + 6 lines * 8|
|Size:|| 6.5" x 4.9" x 0.5
165 x 124 x 12 mm3
|Weight:||7.3 ounces, 202 grams||Serial No:|
|Batteries:||3*LR43||Date of manufacture:||mth 11 year 1988|
|AC-Adapter:||Origin of manufacture:||Taiwan (I)|
|Precision:||8||Integrated circuits:||Toshiba T7971, T7724, LC3518 (or TC5518)|
|Memories:||1 + 99 lines|
|Program steps:||Courtesy of:||Joerg Woerner|
(US: 3.8 MByte)
(DE, FR: 3.6 MByte)
Instruments introduced in 1988 a revolutionary concept: The TI-2800 Paperless Printer! The
calculator works like the known printing desktops e.g. the TI-5010.
All calculations are done on the main display. Instead the usual printout on a
paper the results are scrolled through a secondary display with 6 lines. A
maximum of 99 lines could be stored and scrolled up and down with the arrow keys.
Dismantling this foldable TI-2800 Paperless Printer manufactured in November 1988 by Inventec Corporation in Taiwan reveals an interesting design with two large printed circuit boards (PCBs) in a compact package.
Compared with a simple desktop calculator the internal construction of the Paperless Printer was much more difficult. In each of the two shells of the housing a large, double-sided PCB was integrated. The Main PCB is centered around a Toshiba T7724 microcontroller with an external 2k*8 Static RAM, while the Display PCB used a Toshiba T7971 chip to control the two individual LC Displays.
The TI-2800 Paperless Printer was soon replaced with the TI-5038. A big step in cost reduction was achieved with the TI-5028.
Texas Instruments launched in 1987 a very innovative product line with the TI-2400 Phone Bank, TI-2600 Personal Banker, TI-2700 Mini Data Bank, and TI-2800 Paperless Printer followed till 1990 with the TI-2100 Pocket Info, TI-2900 Info Bank, TI-3100 Pocket Dialer, TI-3200 Pro Dialer, and TI-3400 EUROPA.
Don't miss the TI-2300 introduced in 1988.
If you know the history of Texas Instruments it seems to commemorate the introduction of the TI-2500 Datamath a quarter century ago.
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© Joerg Woerner, May 9, 2002. No reprints without written permission.