DATAMATH CALCULATOR MUSEUM |
Texas Instruments TI-1795
Is
it a small desktop calculator or a large handheld? From the designation "TI-1795" it
is clearly categorized as a desktop product, from the size it could be a handheld like the TI-508.
Dismantling
this TI-1795 manufactured in September 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 TI-1795 calculator brought our attention to a small mark reading
SD9-13, most likely a reference to Type Small Desktop 9 and Revision 1.3
of the design (schematics and layout). We spotted this PCB-Mark already with the near identical offspring
Radio Shack EC-2006A and started compiling a list
of the PCB-Marks on calculators
manufactured by OEMs for Texas Instruments. Meet Kmart
Corporation's KMC 100B - the first
born SD9 calculator with Revision 10.
This TI-1795 introduced in 1984 started a line of everlasting calculators,
compare it with the TI-1795+ and the TI-1795SV.
Texas Instruments added in 1985 a small bump on key #5 of the TI-1795 and in 1988 the design of the TI-1795 was slightly changed before production was shifted to Thailand in 1991.
The TI-1775 put similar specifications in a foldable housing while the TI-1796 added a battery backup and sports a 10 digits display.
OEM Design SD9 (Small Desktop 9)
This TI-1795 is obviously based on an OEM design shared with other manufacturers, find an overview of the known brands/models here:
KMC 100B | KMC 7500C | ||
Privileg SOLAR 31 | Radio Shack EC-2006A | ||
Royal DT 80 (1984) | Royal DT 80 (1986) | ||
Texas Instruments TI-508 |
Texas Instruments TI-508 PLUS |
||
Texas Instruments TI-1795 |
Texas Instruments TI-1795+ |
||
Unisonic XL-1105 (1984) | Unisonic XL-1105 (1986) | ||
Unisonic XL-1110 (1984) | Dixons Solar Desk |
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, June 24, 2002. No reprints without written permission.