DATAMATH CALCULATOR MUSEUM
Unisonic XL-1105 (Version 2)
|Date of introduction:||January 1986||Display technology:||LCD|
|New price:||Display size:||8|
|Size:|| 4.7" x 4.1" x
120 x 106 x 25 mm3
|Weight:||3.0 ounces, 86 grams||Serial No:|
|Batteries:||n.a.||Date of manufacture:||year 1986|
|AC-Adapter:||Origin of manufacture:||Taiwan|
|Program steps:||Courtesy of:||Joerg Woerner|
2nd Generation Unisonic XL-1105 calculator sold in 1986 look familiar to you?
Dismantling the featured XL-1105 manufactured in 1986 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 SD9U-11, most likely a reference to Type Small Desktop 9 Unisonic 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.
IIf you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, April 13, 2020. No reprints without written permission.