DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Unisonic XL-1110
| Date of introduction: | 1984 | Display technology: | LCD |
| New price: | Display size: | 8 | |
| Size: | 4.7" x 4.1" x
1.0" 120 x 106 x 25 mm3 |
||
| Weight: | 3.0 ounces, 86 grams | Serial No: | |
| Batteries: | n.a. | Date of manufacture: | year 1984 |
| AC-Adapter: | Origin of manufacture: | Taiwan | |
| Precision: | 8 | Integrated circuits: | Sharp |
| Memories: | 1 | ||
| Program steps: | Courtesy of: | Joerg Woerner |
Does this
Unisonic XL-1110 calculator sold in 1984 look familiar to you?
Dismantling
the featured XL-1110 manufactured in 1984 by
Cal-Comp Electronics, an
OEM (Original Equipment Manufacturer) in Taiwan, reveals a clean design
centered around an unknown Sharp single-chip calculator circuit soldered on a
double-sided printed circuit board (PCB) and powered by solar cells.
Inspecting the PCB of this
XL-1105 calculator brought our attention to a small mark reading
SD9-11, most likely a reference to Type
Small Desktop 9
and Revision
1.1
of the design (schematics and layout). We spotted a very similar PCB-Mark
reading SD9T-10 already with the near identical offspring
TI-508 and started compiling a list
of the PCB-Marks on calculators
manufactured by OEMs for Texas Instruments.
The XL-1110 was soon replaced with a the XL-1105
using an identical PCB, we could not spot the differences so far.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, August 2, 2023. No reprints without written permission.