Calculators

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 further additions and changes are from www.facele.eu

with permission of the author     www.datamath.org

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Most collectors of early electronic calculators will sooner or later ask themselves: „How old is this piece of history in my hands“? The answer is quiet easy, in conjunction with the pictured albums here in the Datamath Calculator Museum you get a rough estimate of the timeframe each calculator was built. Some models had a very short lifetime, e.g. the rare SR-16 was manufactured between October 1974 and early 1975. Other calculators stayed longer, the famous TI-68 was introduced 1991 and was available in some countries till the year 2000. If you inspect the calculators manufactured by Texas Instruments carefully you will notice small numbers stamped with ink on the body shell, embossed in the plastic mold or printed on the license plate. These numbers look typically like 314, 2676 ATA or I1090. If you study this article carefully you’ll learn that the first calculator is a Datamath Version 2 manufactured April, 1973, the second calculator was produced in the Abilene, TX facility and the third is a modern, Taiwanese LCD calculator. Interested in getting more information?

• Search the numbers

Starting with the introduction of both the Datamath and the early Desktop calculators Texas Instruments used visible ink to stamp the manufacturing date on the back of the calculator housing using a 3-digit code. Unfortunately in most cases the ink got lost over the time on the polished surfaces of the early calculators. Later models like the TI-2550 or Exactra line used a structured surface and the ink is more durable. Some calculators like the SR-50 got the date code printed on hidden places like the internal plastic frame below the battery pack. If you can read only parts of the numbers you should open the calculator and search the manufacturing date on the integrated circuits to limit the possible date range. Calculators introduced in the year 1976 or later use another coding with 4-digits embossed into the mold of the rear case shell. This method was durable, in some cases the readability is limited due to bad adjusted temperature or pressure of the tooling. With the TI-1750, the first Texas Instruments calculator produced in Japan another coding scheme using 3-digits was introduced. These early LCD-calculators with their metal housing got small adhesive license plates carrying the model designation, serial number, date and origin of manufacturing. Later far East products use a novel 4-digit coding for the date of manufacturing.

• Decipher the code

You should be able to decipher 5 different coding schemes of the manufacturing date to cover all calculators and related products manufactured by Texas Instruments. In addition you get in most cases the information of the place of manufacturing.

3-digit date code

Early calculators introduced between the years 1972 and 1975 make use of a three digit code to define the week and year of manufacturing.

Example:  314 reads as 31^th week of the year 1974

You notice immediately that this code was not Y2K compliant and there was a need for another coding scheme.

The origin of the calculator is usually Dallas, TX if not otherwise noted. Only the TI-2500 / TI-3500 was reported to be produced in Italy, UK and Spain and the SR-10 / SR-11 in Brazil and Spain.

3-digit "Early Far East" date code

Calculators produced in Far East and Souteast Asia during the late 70s and early 80s use a three digit code to define the month and last digit of the year of manufacturing

Example:  104 reads as October 1984

The manufacturer of the calculator is coded with one letter and the origin written in plain words. A table is given with the 4-digit "far East" code.

4-digit date code

Calculators introduced later than 1975 and not produced in Asia use a four digit code to define the week and year of manufacturing.

Example:  2676 reads as 26^th week of the year 1976

The origin of the calculator is coded with three letters and / or written in plain words.

4-digit "Far East" date code

Calculators produced in Far East and Southeast Asia use a four digit code to define the month and year of manufacturing.

Example:  1090 reads as October 1990

The manufacturer of the calculator is coded with one letter and the origin written in plain words.

6-digit "European" date code

Calculators produced in Italy use sometimes a six digit code giving the day of production.

Example:  RCI240595 reads as May 24, 1995

3-digit "European" date code

Both the Financial Investment Analyst and Fixed Income Securities calculators manufactured between 1988 and 1991 in Italy use a three digit code to define the week and year of manufacturing.

Example:  439 reads as 43^th week 1989

The years 1990 and 1991 are encoded with the digit 0 resp. 1.

3¼-character "Radio Shack" date code

Calculators manufactured for Radio Shack in the Seventies, Eighties, and Nineties usually sport a 3-character or 4-character date code.

Example:  1A5 reads as 1^st month 1985 or 1995. The character A is just serving as a separator between month and year.

4-digit "Integrated Circuit" date code

Most Integrated Circuits (ICs) manufactured by Texas Instruments or Toshiba use a four digit code to define the week and year of manufacturing.

Example:  7424 reads as 24^th week of the year 1974

The origin of the IC is written in plain words. Early Texas Instruments ICs manufactured by Texas Instruments using a metal–oxide–semiconductor (MOS) process, use a TMS designation and we learned from the TMS1000 and TMS7000 documentation the TI Standard Symbolization: TMX, TMP, and TMS are representative of the evolutionary stages of product development from engineering prototypes through fully qualified production devices:

Devices with on-chip ROM (Read-only Memory) usually include a Cxxxx or CDxxxx reference and might have two different © information:

3-character "Japan Integrated Circuit" date code

Most integrated circuits (IC‘s) manufactured by Hitachi and some other Japanese companies use a three digit/letter/digit code to define the year, month and week of manufacturing.

Example:  3B4 reads as 4^th week within February of the year 1973

The origin of the IC is written in plain words.

4-character "Sharp Integrated Circuit" date code

Most integrated circuits (IC‘s) manufactured by Sharp in the 1980s use a four character code to define the year, month and week of manufacturing.

Example:  538A reads as 1^st week within August of the year 1983

with permission of the author     www.datamath.org

• chips
• TMS1000
• game w/ chip TI

TYPE	YEAR	MARKED	TOY DESCRIPTION
TMS0970	1977	CP0904A	Milton Bradley Comp IV
TMS0970	1977	MP0905B	Parker Brothers Codename Sector
TMS1000	1980	MP0027	24 Melody USA
TMS1000	1978	MP3310	24 Melody Italy
TMS1000	1983	MP3318	24 Melody France
TMS1000	1983	MP3228	24 Melody Germany
TMS1000	1978	MP0057	APH Student Speech+ (same ROM contents as TSI Speech+?)
TMS1000	1979	MP0154	Fonas 2 Player Baseball
TMS1000	1979	MP0158	Entex Soccer (6003)
TMS1000	1979	MP0163	A-One LSI Match Number/LJN Electronic Concentration
TMS1000	1980	MP0166	A-One Arrange Ball/LJN Computer Impulse/Tandy Zingo (model 60-2123)
TMS1000	1979	MP0168	Conic Multisport/Tandy Sports Arena (model 60-2158)
TMS1000	1979	MP0170	Conic Football
TMS1000	1980	MP0220	Tomy Teacher
TMS1000	1980	MP0230	Entex Blast It (6015)
TMS1000	1982	MP0271	Radio Shack Monkey See
TMS1000	1979	MP0907	Conic Basketball (101-006)
TMS1000	1979	MP0908	Conic Electronic I.Q.
TMS1000	1979	MP0910	Conic Basketball (101-003)
TMS1000	1979	MP0914	Entex Baseball 1
TMS1000	1979	MP0915	Bandai System Control Car: Cheetah/The Incredible Brain Buggy
TMS1000	1979	MP0919	Tiger Copy Cat (model 7-520)
TMS1000	1979	MP0920	Entex Space Battle (6004)
TMS1000	1979	MP0923	Entex Baseball 2 (6002)
TMS1100	1979	MP1022	Texas Instruments unknown thermostat
TMS1100	1980	MP1030	APF Mathemagician
TMS1100	198?	MP1072	unknown device
TMS1470	1979	MP1133	Kosmos Astro
TMS1100	1980	MP1180	Tomy Power House Pinball
TMS1100	1979	MP1181	Conic Football 2
TMS1100	1980	MP1183	E.R.S. Superbowl XV Football/Tandy Championship Football (model 60-2151)
TMS1100	1979	MP1185	Fonas 3-in-1: Football Basketball Soccer
TMS1100	1980	MP1193	Tandy Championship Football (model 60-2150)
TMS1100	1980	MP1204	Entex Baseball 3 (6007)
TMS1100	1980	MP1209	U.S. Games Space Cruiser/Strategy Football
TMS1100	1980	MP1211/COPL44	Entex Space Invader (6012)
TMS1100	1980		Tomy Atomic Pinball
TMS1100	1980	MP1215	Tiger Playmaker
TMS1100	1980	MP1218	Entex Basketball 2 (6010)
TMS1100	1980	MP1219	U.S. Games Super Sports-4
TMS1100	1980	MP1221	Entex Raise The Devil (6011)
TMS1100	1983	MP1231	Tandy 3-in-1 Sports Arena (model 60-2178)
TMS1100	1982	MP1296	Entex Black Knight Pinball (6081)
TMS1100	1981	MP1311	Bandai TC7: Air Traffic Control
TMS1100	1983	MP1312	Gakken FX-Micom R-165/Radio Shack Science Fair Microcomputer Trainer
TMS1100	1985	MP1359	Capsela CRC2000
TMS1170	1980	MP1525	Coleco Head to Head: Electronic Baseball
TMS1370	1982	MP1604	Gakken Invader 2000/Tandy Cosmic Fire Away 3000
TMS1700	1981	MP1801	Tiger Ditto/Tandy Pocket Repeat (model 60-2152)
TMS1370	1979	MP2105	Gakken / Entex Poker (6005)
TMS1370	1980	MP2110	Gakken Invader/Tandy Fire Away
TMS1370	1981	MP2139	Gakken Galaxy Invader 1000/Tandy Cosmic 1000 Fire Away
TMS1040	1979	MP2726	Tomy Break Up
TMS1070	1980	MP2788	Bandai Flight Time (? note: VFD-capable)
TMS1730	1989	MP3005	Tiger Copy Cat (model 7-522)
TMS1000	1978	MP3200	Parker Brothers Electronic Master Mind
TMS1000	1977	MP3201	Milton Bradley Electronic Battleship (1977 model 4750A)
TMS1000	1979	MP3206	Concept 2000 Mr MUS-I-CAL
TMS1000	1977	MP3208	Milton Bradley Electronic Battleship (1977 model 4750B)
TMS1000	1978	MP3226	Miltom Bradley Simon (REV.A)
TMS1000	1979	MP3232	Fonas 2 Player Baseball (no "MP" on chip label)
TMS1000	1979	MP3260	Electroplay Quickfire
TMS1000	1979	MP3300	Milton Bradley Simon (Rev F)
TMS1000	1979	MP3301A	Milton Bradley Big Trak
TMS1000	1979	MP3320A	Coleco Head to Head: Electronic Basketball
TMS1000	1979	MP3321A	Coleco Head to Head: Electronic Hockey
TMS1200	1979	MP3352	Tiger Sub Wars (model 7-490)
TMS1000	1981	M32001	Coleco Quiz Wiz Challenger (note: MP3398 MP3399 M3200x?)
TMS1000	1990	M32018	unknown device (have decap/dump)
TMS1000	1983	M32045B	Chrysler Electronic Voice Alert (11-function) -> eva.cpp
TMS1100	1978	MP3403	Marx Electronic Bowling
TMS1100	1978	MP3404	Merlin Parker Brothers
TMS1100	1985		Capsela CRC2000
TMS1100	1979	MP3405	Coleco Amaze-A-Tron
TMS1100	1979	MP3407	General Electric The Great Awakening (model 7-4880)
TMS1100	1978	MP3415	Coleco Electronic Quarterback
TMS1100	1979	MP3435	Coleco Zodiac
TMS1100	1979	MP3438A	Kenner Star Wars Electronic Battle Command
TMS1100	1979	MP3450A	Microvision cartridge: Block Buster
TMS1100	1979	MP3454	Microvision cartridge: Star Trek Phaser Strike
TMS1100	1980	MP3455	Microvision cartridge: Pinball
TMS1100	1979	MP3457	Microvision cartridge: Mindbuster
TMS1100	1979	MP3460	Coleco Head to Head: Electronic Football
TMS1100	1979	MP3474	Microvision cartridge: Vegas Slots
TMS1100	1979	MP3475	Microvision cartridge: Bowling
TMS1100	1979	MP3476	Milton Bradley Super Simon
TMS1100	1980	MP3479	Microvision cartridge: Baseball
TMS1100	1979	MP3481	Microvision cartridge: Connect Four
TMS1100	1980	MP3489	Kenner Live Action Football
TMS1100	1979	MP3491	Mattel Thoroughbred Horse Race Analyzer
TMS1100	1980	MP3493	Milton Bradley OMNI Entertainment System (1/2)
TMS1100	1980	MP3494	Milton Bradley OMNI Entertainment System (2/2)
TMS1100	1980	MP3496	Microvision cartridge: Sea Duel
TMS1100	1981	M34009	Microvision cartridge: Alien Raiders (note: MP3498 MP3499 M3400x..)
TMS1100	1980	@M34012	Mattel Dungeons & Dragons - Computer Labyrinth Game
TMS1100	1981	M34014	Coleco Bowlatronic
TMS1100	1981	M34017	Microvision cartridge: Cosmic Hunter
TMS1100	1981	M34018	Coleco Head to Head: Electronic Boxing
TMS1100	1982	M34038	Parker Brothers Lost Treasure
TMS1100	1982	M34047	Microvision cartridge: Super Blockbuster
TMS1100	1983	M34078A	Milton Bradley Electronic Arcade Mania
TMS1100	1985	M34137	Technasonic Weight Talker
TMS1000	1983	MP4486A	Vulcan XL 25
TMS0970	1979	MP6061	Texas Instruments Electronic Digital Thermostat (from patent the one in MAME didn't have a label)
TMS0980	1979	MP6100A	Ideal Electronic Detective
TMS0980	1979	MP6101B	Parker Brothers Stop Thief
?	1982	MP6354	Tsukuda The Dracula (? note: 40-pin VFD-capable)
?	1983	MP6361	Defender Strikes (? note: VFD-capable)
TMS1400	1980	MP7302	Tiger Deluxe Football with Instant Replay
TMS1400	1982	MP7304	Tiger 7 in 1 Sports Stadium (model 7-555)
TMS1400	1980	MP7313	Parker Brothers Bank Shot
TMS1400	1980	MP7314	Parker Brothers Split Second
TMS1400	1985	MP7324	Tiger K28/Coleco Talking Teacher -> tispeak.cpp
TMS1400	1981	MP7332	Milton Bradley Dark Tower
TMS1400	1981	MP7334	Coleco Total Control 4
TMS1400	1982	MP7351	Parker Brothers Master Merlin
TMS1670	1980	MP7551	Entex Color Football 4 (6009)
TMS1670	1980	MPF553	Gakken/Entex Jackpot: Gin Rummy & Black Jack (6008) (note: assume F to be a misprint)
TMS1670	1981	MP7573	Entex Select-A-Game cartridge: Football 4 -> sag.cpp
TMS2370	1983	M30026	Yaesu FT-757 Display Unit part
TMS2670	1983	M95041	Tsukuda Game Pachinko (have decap missing MCU emulation)
TMS1000	1976	TMS1007	TSI Speech+ (S14002-A)
TMS1100	1981	CD7282SL	Tandy-12 (serial is similar to TI Speak & Spell series)
TMS3615NS	1981		Octave Multiple Tone Synthesizer 2 footage ( Italy )
TMS3617NS	1983		Octave Multiple Tone Synthesizer 6 footage ( Italy )
TMS3834NL	1976		Display clock with multiplexer nixie (Nuova Elettronica N° 45/46) with VFD ( N° 50/51)
TMS3874NL	1980		Display clock with multiplexer led (Nuova Elettronica N° 74)

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with permission of the author     www.datamath.org