Homeland-8109 by Toshiba

Date of introduction:  1977 Display technology:  Fluorescent
New price:   Display size:  8
Size:  5.3" x 3.1" x 0.8"
 135 x 79 x 20 mm3
Weight:  3.8 ounces, 108 grams Serial No:  128711
Batteries:  2*AA Date of manufacture:  year 1979
AC-Adapter:  BH-310 (100V) Origin of manufacture:  Japan
Precision:  8 Integrated circuits:  TMS1045
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

Homeland8109_Label.jpg (15710 Byte)Tokyo Shibaura Electric Co., Ltd., better known as Toshiba - the official name since 1978 - introduced early in their history the Homeland brand. 

The Homeland 8109 replaced soon the 8105 with more or less identical functionality but even lower manufacturing costs. Its sibling Homeland 8009 traded the 4-key memory for the Pi function.

Homeland8109_PCB.jpg (43738 Byte)Dismantling the Homeland 8109 reveals with the TMS1045 the successor of the TMS1071 found in the Homeland 8105. Main reason is the simplifies schematics of the calculator, just compare the two printed circuit boards (PCBs) of the calculators.

Texas Instruments used the same chip pair in the TI-2550 II and TMS 2550 III.


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Joerg Woerner, February 29, 2004. No reprints without written permission.