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DATAMATH CALCULATOR MUSEUM

Texas Instruments IC - Integrated Circuits

Texas Instruments invented the integrated circuit (IC) in the year 1958. The first calculators

with integrated circuits used T! (iode Transistor !ogic)" #T! (#esistor Transistor !ogic) orTT! (Transistor Transistor !ogic) elements. These IC$s are small %uilding %loc&s with ty'ical

logic gates or fli'*flo's in a 1 to 1+ 'in 'lastic housing. To get a wor&ing calculator youneed more than 5, of them. The Cal*Tech 'ro-ect demonstrated in 19+ a calculator using

only / !0I circuits (!arge 0cale Integration) with more than 1,,, transistors 'er circuit.rom that starting 'oint the calculator race created every year new integrated circuits with

higher com'lexity following the !aw of 2oore. 3or&ing at another su''lier of integratedcircuits" the well &nown com'any Intel" 2oore stated4 very three years the com'lexity of

integrated circuits will dou%le. The law is 'roofen" within /, years the com'lexity reachedmore than a million of transistors 'er integrated circuit.

In the meantime Texas Instruments sto''ed the 'roduction of integrated circuits forcalculators. 2ost modern TI 'roducts use chi's from Toshi%a. 6iew the calculator chi's

manufactured %y Toshi%a here.

It$s difficult to get information a%out the calculator circuits manufactured %y TexasInstruments. The following ta%le gives an overview of the &nown circuits" a %rief descri'tion

and the calculators using them.

TI - Integrated Circuits Quick-LinkFamily Year Description First Calculator

T2C1/, 19, irst TI chi' set 'roduced for Canon Inc. Canon 7oc&etronic

T2C1// 1910econd TI chi' set 'roduced for Canon

Inc.

Canon !11

T2C1+1 191 Third TI chi' set 'roduced for Canon Inc. Canon !1+/

T2C18 191 orth TI chi' set 'roduced for Canon Inc. Canon !1,,

T2C18 19 irst TI chi' set 'roduced for livetti livetti !ogos ,

T2C18+ 191irst TI chi' set 'roduced for 0umloc&*

Com'ucor'

Com'ucor' /:

T2C18+ 19 0econd TI chi' set 'roduced for livetti livetti 55

T2018, 191 irst commercial availa%le single chi' un&nown


http://datamath.org/Story/Datamath.htm#Texas%20Instruments%20Invented%20the%20Integrated%20Circuit

http://datamath.org/Story/Datamath.htm#The%20Cal-Tech%20Project

http://datamath.org/Toshiba_IC.htm

http://datamath.org/IC_List.htm#First%20TI%20chip%20set%20produced%20for%20Canon%20Inc.

http://datamath.org/Related/Canon/Pocketronic.htm

http://datamath.org/IC_List.htm#Second%20TI%20chip%20set%20produced%20for%20Canon%20Inc.


http://datamath.org/Related/Canon/L121.htm

http://datamath.org/IC_List.htm#Third%20TI%20chip%20set%20produced%20for%20Canon%20Inc.

http://datamath.org/IC_List.htm#Forth%20TI%20chip%20set%20produced%20for%20Canon%20Inc.

http://datamath.org/Related/Canon/L100A.htm

http://datamath.org/IC_List.htm#First%20TI%20chip%20set%20produced%20for%20Olivetti

http://datamath.org/IC_List.htm#First%20TI%20chip%20set%20produced%20for%20Sumlock-Compucorp


http://datamath.org/Related/Compucorp/324G.htm

http://datamath.org/IC_List.htm#Second%20TI%20chip%20set%20produced%20for%20Olivetti

http://datamath.org/IC_List.htm#First%20commercial%20available%20single%20chip%20calculator

http://datamath.org/index.htm


http://datamath.org/Story/Datamath.htm#Texas%20Instruments%20Invented%20the%20Integrated%20Circuit

http://datamath.org/Story/Datamath.htm#The%20Cal-Tech%20Project


http://datamath.org/IC_List.htm#First%20TI%20chip%20set%20produced%20for%20Canon%20Inc.

http://datamath.org/Related/Canon/Pocketronic.htm



http://datamath.org/Related/Canon/L121.htm

http://datamath.org/IC_List.htm#Third%20TI%20chip%20set%20produced%20for%20Canon%20Inc.

http://datamath.org/IC_List.htm#Forth%20TI%20chip%20set%20produced%20for%20Canon%20Inc.

http://datamath.org/Related/Canon/L100A.htm

http://datamath.org/IC_List.htm#First%20TI%20chip%20set%20produced%20for%20Olivetti



http://datamath.org/Related/Compucorp/324G.htm

http://datamath.org/IC_List.htm#Second%20TI%20chip%20set%20produced%20for%20Olivetti




calculator

T20,1,, 191 Com'lete single chi' calculator family ;owmar 9,1;

T20,1, 19 irst single chi' scientific calculator 0#*1,

T20,,, 19/ Chi' set for 1 digit calculators TI*,,,

T20,/,, 19/ Chi' set for 1 digit calculators TI*,,,

T20,,, 19/ Chi' set for 1 digit calculators 0#*

T2C,5,1 19 Chi' set for scientifical calculators 0#*5,

T20,+,, 19 0econd generation single chi' calculators TI*55,

T20,8,, 19/ 0econd generation single chi' calculators Canon !*8

T201,,, 19 Third generation single chi' calculators 0#*1+

T20,9, 195 Chi'*si<e o'timi<ed single chi' calculator TI*1,,

T2C,98, 19+ 0econd generation scientific calculator 0#*,

T2C15,, 19 Third generation scientific calculator TI*55

T7,/, 198irst generation C*20 single chi'

calculators

TI*5,

T7,/1, 198 0im'lified C*20 single chi' calculators TI*1,/,

T7,55 1981 nhanced C*20 calculator chi's TI*,

T7,5+ 1981 nhanced C*20 calculator chi's TI*55*II

T7,58 198+ nhanced C*20 calculator chi's TI*+,

T7,85 198 ailed C*20 single chi' calculators (TI*88)

T7,5/, 198 ailed C*20 single chi' calculators (TI*88)

First TI chip set produced for Canon Inc.

This set of / integrated circuits was streamlined to the 7oc&etronic with it$s thermal 'rinter.These chi's are manufactured in a =state of the art= 1,*micron 1*metal 720 'rocess and

using ual*Inline*Ceramic or 7lastic (IC>I7) cases with , 'ins.

Type Year Function Calculator Comments

T2C1/, 19, Canon 7oc&etronic

(2onroe 1,)

T2C1/1


http://datamath.org/IC_List.htm#TMS0102

http://datamath.org/Related/Bowmar/901B.htm

http://datamath.org/IC_List.htm#First%20commercial%20available%20single%20chip%20scientific%20calculator

http://datamath.org/Sci/WEDGE/sr-10-v1.htm

http://datamath.org/IC_List.htm#Chip%20set%20for%2012%20digit%20calculators

http://datamath.org/Desktop/ti-4000.htm



http://datamath.org/IC_List.htm#TMC0404

http://datamath.org/Desktop/sr-22.htm

http://datamath.org/IC_List.htm#Chip%20set%20for%20scientifical%20calculators

http://datamath.org/Sci/WEDGE/sr-50.htm

http://datamath.org/IC_List.htm#Second%20generation%20single%20chip%20calculators%20

http://datamath.org/BASIC/DATAMATH/ti-2550.htm


http://datamath.org/Related/Canon/LE-84.htm

http://datamath.org/IC_List.htm#Third%20generation%20single%20chip%20calculators


http://datamath.org/IC_List.htm#With%20the%20TI-1200

http://datamath.org/BASIC/TI-1200/TI-1200.htm

http://datamath.org/IC_List.htm#SR-40

http://datamath.org/Sci/MAJESTIC/sr-40.htm

http://datamath.org/IC_List.htm#In%201977%20the%20display%20size

http://datamath.org/Sci/MAJESTIC/TI-55.htm

http://datamath.org/IC_List.htm#First%20C-MOS


http://datamath.org/Sci/Slimline/TI-50.htm

http://datamath.org/IC_List.htm#Simple%20C-MOS

http://datamath.org/BASIC/LCD_Classic/TI-1030.htm

http://datamath.org/IC_List.htm#Enhanced%20C-MOS

http://datamath.org/Sci/Slanted/TI-40.htm

http://datamath.org/IC_List.htm#TP0456/CD4551

http://datamath.org/Sci/Slanted/TI-55-II.htm



http://datamath.org/IC_List.htm#Failed%20C-MOS


http://datamath.org/IC_List.htm#TP0530




http://datamath.org/Related/Bowmar/901B.htm

http://datamath.org/IC_List.htm#First%20commercial%20available%20single%20chip%20scientific%20calculator

http://datamath.org/Sci/WEDGE/sr-10-v1.htm

http://datamath.org/IC_List.htm#Chip%20set%20for%2012%20digit%20calculators




http://datamath.org/IC_List.htm#TMC0404

http://datamath.org/Desktop/sr-22.htm

http://datamath.org/IC_List.htm#Chip%20set%20for%20scientifical%20calculators


http://datamath.org/IC_List.htm#Second%20generation%20single%20chip%20calculators%20

http://datamath.org/BASIC/DATAMATH/ti-2550.htm


http://datamath.org/Related/Canon/LE-84.htm

http://datamath.org/IC_List.htm#Third%20generation%20single%20chip%20calculators


http://datamath.org/IC_List.htm#With%20the%20TI-1200

http://datamath.org/BASIC/TI-1200/TI-1200.htm

http://datamath.org/IC_List.htm#SR-40

http://datamath.org/Sci/MAJESTIC/sr-40.htm

http://datamath.org/IC_List.htm#In%201977%20the%20display%20size

http://datamath.org/Sci/MAJESTIC/TI-55.htm



http://datamath.org/Sci/Slimline/TI-50.htm

http://datamath.org/IC_List.htm#Simple%20C-MOS

http://datamath.org/BASIC/LCD_Classic/TI-1030.htm

http://datamath.org/IC_List.htm#Enhanced%20C-MOS



http://datamath.org/Sci/Slanted/TI-55-II.htm



http://datamath.org/IC_List.htm#Failed%20C-MOS


http://datamath.org/IC_List.htm#TP0530




T2C1/

econd TI chip set produced for Canon Inc.

The second chi' set su''orted dis'lays instead the thermal 'rinter of the 7oc&etronic. Twodifferent ata Chi's are &nown" the rithmetic Chi' was later re'laced.

These chi's are manufactured in a =state of the art= 1,*micron 1*metal 720 'rocess andusing ual*Inline*Ceramic or 7lastic (IC>I7) cases with , 'ins and 8 'ins.


T2C1//191

ata Chi'Canon !11 (2onroe+,)

T2C1// 191 ata Chi' Canon !1,

T2C1/191

ata Chi'Canon !1+, (2onroe

+1,)

T2C1/ 191 ata Chi' Canon !1,,

T2C15/ 191 Timing Chi'

T2C15 191 ntry Chi'

T2C155 191 rithmetic Chi'

T2C18, 191 rithmetic Chi' #e'laced the T2C155

Third TI chip set produced for Canon Inc.

This chi' set consists of + integrated circuit" one of them was later re'laced.

These chi's are manufactured in a =state of the art= 1,*micron 1*metal 720 'rocess andusing ual*Inline*7lastic (I7) cases with , 'ins.


T2C1+1 191 Canon !1+/ (2onroe+5,)

T2C1+/ 191 Canon !1+/" !1+7

T2C1+ 191 Canon !1+/



T2C1+5 191 Canon !1+/" !1+7

T2C1+5 191 Canon !1+7

T2C1+ 191 Canon !1+/

T2C1+8 191 Canon !1+/

T2C19/ 191 Canon !1+/ #e'laced the T2C1+8

T2C181 191 Canon !1+7

T2C181+ 191 Canon !1+7

Forth TI chip set produced for Canon Inc.

Com'ared with the 'revious chi' sets the trend goes toward single chi' solutions. ;oth

chi's contain together 51?1/*%it read*only 'rogram memory" a 19?1+*%it random*accessmemory and su''ort calculators with u'to 1 digits dis'lay width.

These chi's are manufactured in a =state of the art= 1,*micron 1*metal 720 'rocess andusing ual*Inline* 7lastic (I7) cases with , 'ins.


T2C18 191 ata Chi' Canon !1,," !*1,

T2C185 191 #2 Chi'

First TI chip set produced for umlock-Compucorp

This huge chi' set was develo'ed %y the engineers of Com'ucor' and 'roduced %y 2I.

!ater TI @ualified as a second source to 2I. The chi' set forms one of the first'rogramma%le calculators" the Com'ucor' /: 0cientist.


T2C18+ 191 TC!,8 * is'lay Com'ucor' /: #e'laced %y T2C188

T2C18++ 191 TC!,+ * ata 7rocessor %oard

T2C18+ 191 TC!,5 * ata 7rocessor %oard

T2C18+8 191 TC!,1 * 7rinter Com'ucor' /5 7rinter driver



T2C18+9 191 TC!, * Aey%oardAey%oard*scanningelectronic

T2C18, 191 TC!, * ata 7rocessor %oard

T2C181 191 TC!,/ * #2 Interface to #2 and #2

T2C18 191 TC!, * ata 7rocessor %oard

T2C188 191 TC!,8 * is'lay is'lay multi'lexer

First TI chip set produced for !li"etti

This rare chi' set was found in cto%er ,1, %y fellow collector 2iguel from rgentina in an

livetti !ogos , des&to' 'rinting calculator. The &ey%oard of the calculator s'orts unusualB?D B>D BED" B7D" B#D &eys and B0D and BTDmemories.

These chi's are manufactured in a =state of the art= 1,*micron 1*metal 720 'rocess andusing ual*Inline* 7lastic (I7) cases with 8 'ins (T2C189) and 1+ 'ins (T2C18"

T2C188).


T2C1819 not yet

discovered

livetti !ogos ,

T2C18819 not yet

discovered

T2C18919 not yet

discovered

econd TI chip set produced for !li"etti

This rare chi' set was found recently in an livetti 55 des&to' 'rinting calculator. The

&ey%oard of the calculator s'orts additional B,,DB,,,D &eys" unusual B?D B>D &eys and a

memory.These chi's are manufactured in a =state of the art= 1,*micron 1*metal 720 'rocess and

using ual*Inline* 7lastic (I7) cases with 8 'ins (T2C18+) and 1+ 'ins (T2C188"T2C18).


T2C18819 not yet

discoveredlivetti 55

T2C18+ 19 not yet



discovered

T2C1819 not yet

discovered

First commercial a"aila#le single chip calculator

The first commercial availa%le =calculator*on*a*chi'= was an 20 integrated circuit

announced %y TI in 0e'tem%er 1" 191. ind the original 'ress release here. The chi'containes /5,*%it read*only 'rogram memory" a 18*%it random*access memory and a

decimal arithmetic logic unit as well as control" timing" and out'ut decoders %ut no drivers for the dis'lay. This gives an overall com'lexity of roughly 5,,, transistors. The ty'ical

su''ly voltage ot this chi' is F. 6 at roughly 15 m 'ower consum'tion.These chi's are manufactured in a =state of the art= 1,*micron 1*metal 720 'rocess and

using ual*Inline* 7lastic (I7) cases with 8 'ins.It too& a%out a year till the first co'y of the original design a''eared. G0 %ased com'any

20TA introduced the 2A5,,7 ecem%er" 19.


T2018, 191 0ingle chi'" ;asic un&nown #enamed to T20,1,

T20185 19 0ingle chi'" ;asic Heath&it IC*,,8 #enamed to

T20,1,1 19 0ingle chi'" ;asicCanon 7almtronic !*

8/J"*" &eys" 8 digits

T20,1, 19 0ingle chi'" ;asic Colum%ia II BJD"B*D &eys" 8 digits

T20,1,/ 19 0ingle chi'" ;asic ;owmar 9,1; BJD"B*D &eys" 8 digits

T20,1,5 19 0ingle chi'" ;asic Canon !8,, BJD"B*D &eys" 8 digits

T20,1,+ 19 0ingle chi'" ;asic TI*/5,," Canon !1,,0BJD"B*D &eys" 1, digits"7ana'lex

T20,1, 19 0ingle chi'" ;asic ;owmar 9,1 BJD"B*D &eys" 1, digits

T20,1,9 19 0ingle chi'" ;asic TI*/,,,BJD"B*D &eys" 8 digits"

7ana'lex

T20,11, 19 0ingle chi'" ;asic TI*5,, 7reseries J"*" &eys" 8 digits

T20,111 19 0ingle chi'" ;asic 2inimath 'rototy'es J"*" &eys" 8 digits" !C

T20,11 19 0ingle chi'" ;asic Toshi%a ;C*,8, BJD"*" &eys" 8 digits

T20,115 19 0ingle chi'" ;asic 7anasonic K*85,G J"*" &eys" 8 digits

http://datamath.org/Story/Datamath.htm#The%20

http://datamath.org/IC_List.htm#Display%20drivers

http://datamath.org/Chips/MK5020.htm

http://datamath.org/Chips/TMS0102.htm











http://datamath.org/Story/Datamath.htm#The%20


http://datamath.org/Chips/MK5020.htm














T20,118 19 0ingle chi'" ;asic J"*" &eys" 1, digits

T20,119 19 0ingle chi'" ;asicTI*5,," Heath&it IC*1,8

J"*" &eys" 8 digits

First commercial a"aila#le single chip scientific calculator

The original single chi' calculator was limited to %asic calculators. The T20,1, added to

the 8 digit mantissa a two digit ex'onent dis'lay %ut still uses external dis'lay drivers.


T20,1, 19 0ingle chi'" 0ci 0#*1,J"*" &eys" x"1>x"s@r(x)"8J digits

Later single chip calculators

There are some later single chi' calculators using external drivers for the dis'lay. necalculator" the xactra , used only digit drivers" the segment drivers of the calculators

were connected directly to the dis'lay. The T20,1/5 e.g. containes 819*%it read*only'rogram memory" a 5+*%it random*access memory and a decimal arithmetic logic unit as

well as control" timing" and out'ut decoders and the segment drivers for the dis'lay. Thisgives an overall com'lexity of roughly 88,, transistors.


T20,11 19/ 0ingle chi'" ;asic lym'ia C1,1 J"*" &eys" 1, digits

T20,1 19 0ingle chi'" ;asic lym'ia C8, J"*" &eys" 8 digits

T20,1/ 19/ 0ingle chi'" ;asicBJD"B*D &eys" x" s@r(x)"1, digits

T20,15 19/ 0ingle chi'" ;asic Canon !*1,, J"*" &eys" 1, digits

T20,1+ 19/ 0ingle chi'" ;asic

Canon !*8,#"

Commodore /1,1"Aings 7oint C*81/

BJD"B*D &eys" x" s@r(x)"8 digits

T20,1 19/ 0ingle chi'" ;asic ;owmar 2L*8,BJD"B*D &eys" M" 1,digits

T20,18 19/ 0ingle chi'" ;asicCanon !*8" KC7ercent

BJD"B*D &eys" M" 8 digits

T20,1/, 19/ 0ingle chi'" ;asic 7anasonic K*8+,G J"*" &eys" s@r(x)" 7I



















T20,1/1 19/ 0ingle chi'" ;asic 7anasonic K*855G

T20,1/ 19 0ingle chi'" ;asic7 2ar& 6II" Craig

51,

BJD"* &eys" 2emory" 8

digits

T20,1/5 19 0ingle chi'" ;asic xactra , J"*" &eys" 8 digits

T20,1/ 19 0ingle chi'" ;asic 0ears 8 J"*" &eys" M" 8 digits

T20,1/ 19 0ingle chi'" ;asic Canon 7oc&etronic II uses 7rinter chi' T20,+1

Chip set for $% digit calculators

ne limitation of the 8*'in 'ac&ages of the T20,1xx was the maximum num%er of 1, or

8J digits for the results. or des&to' calculators Texas Instruments develo'ed chi' setswith two ,*'in integrated circuits.


T20,,1 19/ ata chi'" ;asicTI*,,," Canon

!11" !11,1 digits" 7ana'lex

T20,, 19/ ata chi'" 0ci 0#*, 1,J digits" 7ana'lex

T20,,/ 19/ ata chi'" ;asicTI*5," TI*5,," TI*

+," T! +11

1 digits" 7ana'lex

T20,,+ 19/ ata chi' lym'ia C,1

T20,, 19/ ata chi'" HL 0#* 1,J digits" 7ana'lex

T20,1 19Not yetdiscovered

TI*5,,Gsed together withT20,,/

T20,/,1 19/ #2 chi'" ;asic TI*,,, BJD"B*D &eys" 2emory" A

T20,/, 19/ #2 chi'" ;asic Canon !11 BJD"B*D &eys" 2emory" A

T20,/, 19/ #2 chi'" 0ci 0#*,J"*" &eys"x"1>x"s@r(x)"xO"7I"e

T20,/,5 19 #2 chi'" ;asic TI*5,, 7rinting only

T20,/,+ 19 #2 chi'" ;asic TI*+, 7rinting only



T20,/18 19/ #2 chi'" ;asic lym'ia C,1

T20,/, 19/ #2 chi'" ;asic T! +11BJD"B*D &eys" 2emory"L" A"s@r(x)

T2C,/1 19/ Two chi'" ;asic Canon !11, BJD"B*D &eys" 2emory"A"s@r(x)

T2C,/ 19/ Two chi'" ;asic TI*5, BJD"B*D &eys" 2emory" A

T2C,// 19/ #2 chi'" HL 0#*

T2C,, 19/nd #2 chi'"HL

0#*

T2C,,+ 19 nd #2 chi' TI*+, 7rinting only

Chip set for scientifical calculators

3ith the T2C,5,1 %uilding %loc&s Texas Instruments created a novel architecture for

scala%le scientific calculators. The architecture used minimum a chi' design with therithmetic chi' and the 0C2 (scanning read only memory) %ut was ex'anda%le to a

maximum of 8 0C2$s" additional #2 as 'rogram memory for 'rogramma%le calculators"additional #2 for general 'ur'ose registers and even a chi' driving a 'rinter. 2ost

scientific and 'rogramma%le calculators from Texas Instruments %etween the years 19and 198 (0#*5,..TI*59) use these chi's.

%%reviations4

P #ITH rithmetic chi' with 5?1+ digits registers" segment scanning and driving

P 0C2 0canning and #ead nly 2emory with 1&?1/ instruction memory and 1+?1+

digits constants

P 0C2 0C2 with dou%led memory ca'acity of .5&?1/ instruction memory and

1+?1+ digits constants

P E0C2 0C2 with fourfold memory ca'acity

P ;#2 ;are #ead nly 2emory with 1&?1/ instruction memory

P #2 xternal #andom ccess 2emory for user data (memory registers)

P 7#2 xternal #andom ccess 2emory for user 'rogramms (&ey codes) with 19,

%its of read>write memoryP 7#2 xternal #ead nly 2emory for user 'rogramms (&ey codes)

P 7CHI7 7rinter chi'

Texas Instruments used the leading designation T20 (Texas 2os 0tandard) or T2C (Texas

2os Custom) for most chi's. The following ta%le uses only the (more common) T2Cdesignations.




T2C,5,1 19 #ITH

0#*5,()"51()"51*

II"5"5+"

+," TI*5/,

1,J digits

T2C,5,1 199 nhanced #ITH0#*+," TI*58(C)"TI*59

1,J digits

T2C,51 19 0C2 0#*5," 0#*5,;asic system4 T2C,5,1 J

T2C,51

T2C,5 19 0C21 0#*51" 0#*51 dds statistical functions(#2) and conversion

constantsT2C,5/ 19 0C2 0#*51" 0#*51

T2C,5 195 0C2 0#*5

T2C,5+ 19+ 0C2 0#*+,

T2C,5/1 19+ 0C2 0#*5,ifferences to T2C,51 not&nown

T2C,5/ 19+ 0C21 0#*51

ound in late models

T2C,5// 19+ 0C2 0#*51

T2C,5/ 19+ 0C2 0#*5ifferences to T2C,5 not

&nown

T2C,5/ 19+ 0C21 0#*5+ dds statistical functions

(#2) and

'rogramma%ilityT2C,5/8 19+ 0C2 0#*5+

T2C,5+1 195 ;#2 0#*5" 7C*1,,

T2C,5+ 195 ;#2 0#*5 chi's 'iggy %ac& in 0#*5

T2C,5+9 195 ;#2 7C*1,,

T2C,51 19 ;#2 TI*58" TI*59 see T2C,58

T2C,5 198 ;#2 TI*5/, see T2C,58

T2C,5/ 199 ;#2 TI*58C see T2C,58,



T2C,58,

>C,,199 0C2 TI*58C

Instead of T2C,58 on TI*

58>59

T2C,58,

>C,1199 0C2 TI*58C

Instead of T2C,58/ on TI*

58>59

T2C,581 19+ 0C2 0#*51*IIcom%ines T2C,5 JT2C,5/

T2C,58 19 0C2TI*58" TI*59" TI*58C

(1)" 0#*+,() 0C2 J ;#2 adds to

+&?1/ instruction memory

for the TI*59T2C,58/ 19 0C2

TI*58" TI*59" TI*58C

(1)" 0#*+,()

T2C,58 19 0C2 0#*+,()nhanced instructions of

0#*+,()

T2C,58 198 0C2 TI*5/, 0C2 J ;#2 adds to+&?1/ instruction memory

for the TI*5/,T2C,588 198 0C2 TI*5/,

T2C,591 199 TI*58C Interface to 0*#2

T2C,59 19 2:NTIC I> TI*59 only

T2C,595 195 2:NTIC I> 0#*5adds 'rogramma%ility toT2C,5

T2C,59+ 19 2:NTIC I> 0#*+,

T2C,598 19 7#2TI*58 ()" TI*59 ()"

TI*5/, ()

,?8 #2 (, 'rogramste's or /, data registers)

each

T2C,599 195 7#20#*5 ()" 0#*5+ (1)"

0#*+, (1/)

,?8 #2 (, 'rogram

ste's or /, data registers)

each

T2C,51 19+ 7rinter 7C*1,,";"C rives 7C*1,, 'rinter

T2C,5/ 19+ is'lay 0#*+,()rives al'hanumeric

dis'lay

T2C,5 19+ 7rinter 0#*+,() rives thermal 'rinter

T2C,55 198 7rinter TI*5/, rives thermal 'rinter

http://datamath.org/Chips/TMC0501.htm

http://datamath.org/Chips/TMC0501E.htm


http://datamath.org/Chips/TMC0501E.htm





T2C,+1 19+ is'lay" 7rinter TI*5,,0ingle*chi' 'rintingcalculator

T2C,+ 198 is'lay" 7rinter TI*5,50ingle*chi' 'rinting

calculator

T2C,+/ 198, is'lay" 7rinter TI*51/50ingle*chi' 'rintingcalculator

The TI*58>59 architecture introduced the 0olid 0tate 0oftware 2odulesQ with u' to 5,,,'rogram ste's. n the %ac&side of the TI*58>59 you$ll note a small lid with a 'lace for the

8*'in module" view it here.


T2C,5, 19 7#2 *Customer* TI*58(C)" TI*59

!ist of all &nown #2*

Codes here

T2C,51 19 7#2 *1* TI*58(C)" TI*59 2aster !i%rary

T2C,5 19 7#2 ** TI*58(C)" TI*59 ''lied 0tatistics

T2C,5/ 19 7#2 */* TI*58(C)" TI*59 #eal state Investment

T2C,5 19 7#2 ** TI*58(C)" TI*59 0urveying

T2C,55 19 7#2 *5* TI*58(C)" TI*59 2arine Navigation

T2C,5+ 19 7#2 *+* TI*58(C)" TI*59 viation

T2C,5 19 7#2 ** TI*58(C)" TI*59 !eisure !i%rary

T2C,58 19 7#2 *8* TI*58(C)" TI*59 0ecurities nalysis

T2C,59 19 7#2 *9* TI*58(C)" TI*59 ;usiness ecisions

T2C,55, 19 7#2 *1,* TI*58(C)" TI*59 2ath Gtilities

T2C,551 19 7#2 *11* TI*58(C)" TI*59 lectrical ngineering

T2C,55/ 19 7#2 *0* TI*58(C)" TI*59 0tructural ngineering

T2C,55 19 7#2 *1* TI*58(C)" TI*59 griculture

T2C,555 19 7#2 *1/* TI*58(C)" TI*59 #7N 0imulator













econd generation single chip calculators

There are some later single chi' calculators using external drivers for the dis'lay. Theysu''ort either a memory or some enhanced scientifical functions.


T20,+,1 19 0ingle chi'" ;asic TI*55,J"*" &eys" 2emory" 8

digits

T20,+, 19/ 0ingle chi'" 0ci 0#*11 J"*" &eys" x"1>x"s@r(x)"7I

T2C,+,5 19 0ingle chi'" ;asic Canon !*812J"*" &eys" FM" s@r(x)" 8digits

T20,8,1 19/ 0ingle chi'" ;asicCanon !*8" 0inclair

Cam%ridge

J"*" &eys" Constant" 8

digits

T20,8,/ 19 0ingle chi'" ;asic TI*15,, J"*" &eys" M" 8 digits

T2C,8,5 19 0ingle chi'" 0ci 0inclair 0cientific G7N" log" sin..." 8 digits

T20,8,+ 19 0ingle chi'" ;asic xactra 19 J"*" &eys" + (8) digits

T20,8, 19 0ingle chi'" ;asic Canon !*85BJD"B*D &eys" s@r(x) 8digits

T20,8// 19 2; x'ert

T20,851 19 7rivileg 8,

T20,85 19 0ingle chi'" ;asic TI*15, J"*" &eys" M" 8 digits

T20,855 195 0ingle chi'" ;asicCanon !*8," 0ilver*

#eed 8J"*" &eys" M" s@r(x)

T20,89/ 19+ 0ingle chi'" ;asic Ta%ulex al'ha

Third generation single chip calculators

3ith the T201,,1 Texas Instruments introduced the first mem%er of the famous T201,,,2icrocom'uter family. The chi' contains a microcom'uter com'lete with a 'rogram #2

having 1", eight*%it wordsR a tem'orary storage #24 in'ut (from &ey'ad)R out'ut (tocontrol &ey'ad scan and ! dis'lay)R and an oscillator (cloc&). The T201,,, chi' was

designed to s'an a range of hand*held calculator 'roducts (from four*function u' throughsim'le memory calculators). 0ince the chi' had to %e customi<ed with the #2 'rogram

a''ro'riate to a 'roduct" other 'rogramma%le features were included to im'rove the chi'$sflexi%ility. Today we &now 1/ different chi's used in TI single*chi' calculators. These chi's

http://datamath.org/SCI/WEDGE/Modules.htm

http://datamath.org/SCI/WEDGE/Modules.htm



vary in im'lementation technology" num%er of I> lines" dis'lay drive" amount of #2 (u'to +.+ A%it) and amount of #2 (u' to 18, %its). Calculator a''lications range from

sim'le four*function calculators to the 5,*ste' 'rogramma%le TI*5. s of mid 199" over/5 million T20 1,,, chi's were used in %oth calculator and noncalculator a''lications"

esta%lishing the T201,,, as the com'uterarchitecture with the largest installed %ase. Theinternal cloc& rate varies from ,, to 5, AH<" de'ending on technology.


T201,,1 19 0ingle chi'" 0ci 0#*1+ull scientific (w>o trig)"8J digits

T2C1,1>11 TI*5,5,

S,5/5 195 0ingle chi'" 0ci Canon * ull scientific" 8J digits

T201,1+ 195 0ingle chi'" 0ci 0#*1+*IIull scientific (w>o trig)"

8J digits

T201, 0ingle chi'" ;asiclym'ia C5"Canon !*82s

T201,/ 195 0ingle chi'" ;asic TI*55,*IIIJ"*" &eys" M"

x"1>x"s@r(x)

T201, Gnisonic 1,,

T201,5 0ingle chi'" ;asic Toshi%a ;C*8111;"

;C*8110!" Canon

!81/" */1

J"*" &eys" M"

x"1>x"s@r(x)

T201,1 195 0ingle chi'" ;asicTI*55,*II" Homeland

81,5

J"*" &eys" M"

x"1>x"s@r(x)

T201,/ 19+ 0ingle chi'" ;asicTI*51,," Toshi%a ;C*1,15

T201,9 199 0ingle chi'" ;asic Canon 2*8Two*line dis'lay" 8J8

digits

T201115 19+

0ingle chi'"

7rinting TI*5,5,2

T201/ 19+ 0ingle chi'" ;asic Toshi%a ;C1,BJD"B*D &eys" 2emory"

A"s@r(x)" 1 digits

T2C18 19+ 0ingle chi'" ;asic TI*5,,

T2C1/,9 19 0ingle chi'" TI*5, rives thermal 'rinthead


http://datamath.org/Story/Intel.htm#The%20TMS1000%20Single%20Chip%20Calulators







7rinting

T2C1/1 190ingle chi'"7rinting

TI*55 rives thermal 'rinthead

T2C1/ 19 0ingle chi'"7rinting TI*5," TI*55(S,/9+) rives 6*is'lay

T2C1/+ 190ingle chi'"

7rintingTI*5/, rives 6*is'lay

S,55 19+ 0ingle chi'" ;asic Canon !1,1," !*1,2 1, digits

S,51 19+ 0ingle chi'" ;asic dman !*,8/,T M" A" 8 digits

3ith the TI*1,, and TI*15, calculators Texas Instruments introduced 2arch" 195 the

first calculators using a real single chi' design. The 8 digit !*dis'lay and 8? matrix&ey%oard are connected directly to the integrated circuit and the whole system is 'owered

%y a single 96 %attery.


T20,95 195 0ingle chi'" ;asic TI*1,," TI*15,J"*" &eys" 2emory" signJ 8 digits

T20,95 19+ 0ingle chi'" ;asic TI*1+,J"*" &eys" 2emory"

conversions

T20,9 19+ 0ingle chi'" ;asicTI*15," National8/5 (O)

8 digits" minor changes toT20,95

T20,9 19+ 0ingle chi'" ;asic TI*1,J"*" &eys"

x"1>x"s@r(x)"7I" 8 digits

T20,95 19+ 0ingle chi'" Toy !ittle 7rofessor

0hortly %efore the introduction of the C*20 technology in the year 198 some chi'*si<e

o'timi<ed architectures a''eared. ind more details in the descri'tion of the T201,,,

2icrocom'uter family.


T2C,9, 19 Toy 3i<**Tron

T2C,91 19 0ingle chi'" ;asic TI*1,5, J"*" &eys" 2emory"



sr@(x)" M

T2C,9/ 19 0ingle chi'" ;asic TI*1,5 J"*" &eys" 2emory" M

T2C1981 19 0ingle chi'" ;asic TI*1+8, uses T2C,999

T2C198 19 Toy TI ataman

T2C198/ 198 0ingle chi'" 0ci TI*5ull scientific" 8 (5J)digits

T2C198 198 Toy 0'elling ; (original) uses T2C,

T2C198+ 198, Toy 2ath 2arvel

T2C1991 19 0ingle chi'" ;asic TI*1,,, J"*" &eys" M

T2C199 19 0ingle chi'" ;asic TI*1,,, 6ersion J"*" &eys" M

In the year 19+" with the 0#*, and TI*/, the first scientifical calculators using a realsingle chi' design were introduced. These calculators used a 8 digit !*dis'lay" too. In

19 the dis'lay si<e was ex'anded to 8J digits.


T2C,98, 198 Custom design :oulds 7um'ulator #2 code C98,1

T2C,981 19+ 0ingle chi'" 0ci TI*/," 0#*, ull scientific" 8 (5J)digits

T2C,98 19+ 0ingle chi'" in ;usiness nalyst ull financial" 8 (5J) digits

T2C,98/ 198 0ingle chi'" HL TI 7rogrammerHL calculator" #2 codeS,+5

T2C,98 19+ 0ingle chi'" 0ciTI*// ull scientific" / mem." 8

(5J) digits

T2C,985 19 0ingle chi'" 0ci

2 ull scientific" no 0" 8

(5J) digits

In 19 the dis'lay si<e of the single chi' scientific calculators was ex'anded to 1,Jdigits. Together with a huge memory these chi's have transistor counts of roughly /,",,,

elements.













T2C15,1 19 0ingle chi'" 0ciTI*5 7rogramma%le ull scientific"

'rogramm."8J digits

T2C15, 19 0ingle chi'" in The 2; ull financial" hugemem."8J digits

T2C15,/ 19 0ingle chi'" 0ciTI*55 ull scientific" huge

mem."8J digits

In the year 198 Texas Instruments invented the synthesi<er technology to re'roducehuman s'eech with tuned voices stored in #2$s (integrated circuits) and created the 0'ea&

0'ell. :et more infromation a%out the synhesi<er chi's and their 0'eech*#2$s here. Thefirst 'roducts used s'eciali<ed calculator chi's of the T201,,, family to manage &ey%oard

and dis'lay of the 'roduct.

The derivates were either num%ered li&e T2C,1" T2C,... or got a C (Custom

esign) num%er" e.g. CD%&'%.


T2C,1 198 Toy 0'ea& 0'ell (198)

T2C, 198 Toy 0'elling ; (GA) Gses T2C198

T2C,/ 198, Toy 2r. Challenger

T2C, 198 Toy 0'elling ;

T2C,,>C, 198, Toy !a dictee magi@ue

T2C,,>C,5 198, Toy 0'ea& #ead

T2C,,>C,8 198, Toy 0'ea& 2ath (GA)

First generation C-(! single chip calculators

In 1!" T#$as Instr%m#nts introd%&#d th# 'irst C(MOS &a)&%)ator &hips *as#d on th# TMS1+++ Mi&ro&omp%t#r 'ami),. Th# T-++ ar&hit#&t%r# is simi)ar to th# TMC+"+ &hips

introd%&#d t0o ,#ars #ar)i#r 'or th# TI(+ &a)&%)ator. Th# main di''#r#n&# *#sid# th#

man%'a&t%ring pro&#ss is th# p#rman#nt &onn#&tion o' th# int#rna) m#mor, 23451 *its

RAM6 to th# s%pp), 7o)tag#. This '#at%r# a))o0#d th# 8Constant M#mor,9 'o%nd on th#

&a)&%)ators *as#d on th# T-++ 'ami), )i# th# TI(;+ or TI(;. E7#n a't#r ,o% t%rn o'' th#

&a)&%)ator its %s#r m#mor, is stor#d insid# th# &hip. Th# s%pp), &%rr#nt is )o0 #no%gh to

*%''#r th# m#mor, mor# than a ,#ar 'rom t0o sma)) *%tton &#))s. Th# program m#mor, 0ith



5 *its ROM a))o0#d th# &on7#rsion o' most &a)&%)ating '#at%r#s no0n 'rom Ma<#sti&

&a)&%)ators 2S&i#nti'i&a)= Statisti&a) and >inan&ia) &a)&%)ator or #7#n >)ight &omp%t#rs6.

R#m#m*#r that th# 'irst LCD(&a)&%)ators so)d *, T#$as Instr%m#nts %s#d 'or#ign &a)&%)ator

&hips man%'a&t%r#d *, Toshi*a. ?#t mor# in'ormation a*o%t th#m h#r#.

Tog#th#r 0ith th# C(MOS pro&#ss th# #mp)o,##s o' T#$as Instr%m#nts &hang#d th#

nom#n&)at%r# o' th# &hips. Inst#ad o' th# )#ading &hara&t#rs TMS 2T#$as Mos Standard6 or

TMC 2T#$as Mos C%stom6 th# a**r#7iation T- app#ar#d 'or th# n#0 d#7i&# 'ami)i#s. Th#s#

Mi&ro&omp%t#rs got *oth ROM programma*i)it, and ?at# programma*i)it, 2#.g. s#gm#nt

d#&od#r6. Th# d#ri7at#s 0#r# #ith#r n%m*#r#d )i# T-++= T-+1... or got a CD 2C%stom

D#sign6 n%m*#r= #.g. CD3202.


T7,/,>C/,1 198 0ingle chi'" inTI Investment nalyst ull financial" 8 (5J)

digits

T7,/,>C/, 198, 0ingle chi'" inTI*/,*II" TI*/, !C ull scientific" 8 (5J)

digits

T7,/1 198 0ingle chi'" 0ciTI*5, ull scientific" 8 (5J)

digits

T7,/ 198 0ingle chi'" inTI ;usiness nalyst II ull financial" 8 (5J)

digits

T7,// 198 0ingle chi'" 0ciTI*5/ ull scientific" 8 (5J)

digits

T7,/ 198 0ingle chi'" 0ciTI*/5 ull scientific" 8 (5J)

digits

T7,/+ 199 0ingle chi'" 0ci TI*/8" TI*, TI*/5 w>o statistics

T7,/ 199 0ingle chi'" 0ci0har' !*5,/ #educed &ey%oard" 8

(5J) digits

T7,/8 198, light Com'uterKe''esen avstar Conversions and

calculations

implified C-(! single chip calculators

uring the calculator war (a%out 19+ to 198) a lot of customi<ed chi' architecturesa''eraed even from Texas Instruments. Instead using the T201,,, device with the large

#2 and #2 amount some Uarea o'timi<edV architectures a''eared. onWt forget that inthe early days of IC*Technology the yield of designs with some thousands of transistors was

'oor O The T7,/1, introduced in the year 198 %ased on the serial architecture of the


http://datamath.org/Speech_IC.htm




T20,9, o'timi<ed for the T201,5, calculator. This was the most com'act design withonly 511?9 %its #2 and ,?5 %its #2 using a one*%it serial adder. nly few calculators

ma&e use of the T7,/1, devices.


T7,/11 198 0ingle chi'" ;asicTI*1,/, J"*" &eys" 2emory"

sr@(x)" M

T7,/1 198 0ingle chi'" ;asic TI*1,,J"*" &eys" 2emory"

x"1>x"s@r(x)"7I

)nhanced C-(! calculator chips

Th# T-++ ar&hit#&t%r# 0ith on), " pin ho%sings= 5 *its ROM and 3451 *its RAM

)imit#d &a)&%)ator d#signs to simp)# S&i#nti'i&a) 2TI(;+6= Statisti&a) 2TI(;6 and >inan&ia)

2@%sin#ss Ana),st II6 &a)&%)ators dri7ing disp)a,s 0ith on), " digits 2or ; digits #$pon#nts6r#so)%tion. Th# Bprogramma*)#B TI(; stor#d as m%&h as #, #ntri#s in th# m#mor,=

thats it

T#$as Instr%m#nts introd%&#d 0ith th# T-+4;; ar&hit#&t%r# a n#0 d#sign to o7#r&om# th#s#

)imitations. It is sti)) *as#d on th# TMS1+++ ar&hit#&t%r# *%t add#d tim#(##ping &apa*i)iti#s

and a mor# ')#$i*)# disp)a, dri7#r. Th# T-+4;; is sti)) gat#(programma*)#. Th# 'irst %s# o'

th# T-+4;; 0as th# CD4;+1 d#sign 'o%nd in th# Tim# Card introd%&#d #nd o' th# ,#ar 1"1.

Th# TI(;; II d#mostrat#d th# ')#$i*i)t, o' th# T-+4;; ar&hit#&t%r#= t0o &hips 'orm#d a

po0#r'%) Mast#r(S)a7# ar&hit#&t%r#. Th# Mast#r %s#s a 4+pin ho%sing and s&ans th#

#,*oard= dri7#s a h%g# disp)a, 0ith " digits and p#r'orms th# math &apa*i)iti#s. Th#

S)a7# in th# 0#)) no0n "pin ho%sing do%*)#s th# m#mor, &apa&it, o' th# &a)&%)ator. This

a))o0s #.g. ;3 programm st#ps &ompar#d to th# st#ps o' th# TI(;. Th# T-+4;; d#sign

0as soon r#p)a&#d 0ith th# T-+4;3 and most d#signs 0#r# &on7#rt#d. Th# CD n%m*#rs

0#r# in&r#m#nt#d ;+ %nits to disting%ish th# di''#r#n&# *#t0##n T-+4;; 2#.g. CD45156 and

T-+4;3 #.g. CD45656. Th# T-+4;3 s##ms to *# %p0ard &ompati*)# to th# T-++= 0# no0

0ith th# TI(+LCD r#sp( TI(+(II a &a)&%)ator %sing #ith#r th# CD+ or CD4;3; d#sign.

# ass%m# that th# CD46xx nom#n&)at%r# 0as %s#d 'or origina) T-+4;3 d#signs= th#, 0#r#

dis&o7#r#d main), in #d%&ationa) to,s.

Th# n#$t st#p in th# #nhan&#d C(MOS ar&hit#&t%r#s &o%)d *# 'o%nd in th# T-+4;"

ar&hit#&t%r#. Th#s# &hips 0ith th# CD48xx nam#p)at# %s# a)0a,s a 4+pin ho%sing and ho)d

t0i&# th# RAM amo%nt &ompar#d to th# T-+4;3. In &on<%n&tion 0ith th# Mast#r(S)a7#ar&hit#&t%r# som# po0#r'%) &a)&%)ators )i# th# TI(3 ?a)a$, or TI(3; app#ar#d 0ith as m%&h

as 11 programming st#ps or 13 data m#mori#s and #7#n tim#r '%n&tions. Sing)# &hip

d#signs 0#r# dis&o7#r#d in 8disp)a, int#nsi7#9 prod%&ts )i# th# TI(+ ?a)a$, or th# rar# @A(

III.





ith th# introd%&tion o' th# T-+4;" 0# &o%)d &)os# th# histor, o' &a)&%)ator &hips

man%'a&t%r#d *, T#$as Instr%m#nts. Th# ,#ars *#t0##n 13! and 1" *ro%ght %s a )ot o'

#$&iting &a)&%)ator ar&hit#&t%r#s dri7#n *,

P Technology (early ste's with multi*chi' designs)

P lexi%ility (T201,,, architecture)P Cost 7rice (serial architectures)

P evelo'ment Costs (T7,5+ architecture)

!ater calculator develo'ments %ased mostly on Toshi%a calculator chi's" Texas Instruments

dro''ed their own %usiness with the T201,,, and concentrated on 07 (igital 0ignal

7rocessing) chi's. nce again TI is a leading su''lier in commercial 'roducts" most mo%ile

'hones use their 07*architecture nowadays.


T7,55>C5,1C 19810ingle chi'"

;asic

Time Cardnot yet discovered

T7,55>C5,5 1981 ual chi'" 0ci TI*55 II 0lave ull scientific" 5+ ste's

T7,55>C5,+ 1981 ual chi'" 0ci TI*55 II 2aster ull scientific" 5+ ste's

T7,55>C5,; 1981 0ingle chi'" 0ci TI*/5" TI*, #e'laces T7,/

T7,55>C5,8C 1980ingle chi'"

Cloc&

TI*,,, (Time

2anager)

ull larm Cloc&

T7,55>C5,9; 198 0ingle chi' TI*189, (Converter) G0>I0 converter

T7,55>C511 198 0ingle chi' C*8,,Cassette Interface for TI*88

T7,55>C51 198 ual chi' C*II 2aster not yet discovered

T7,55>C51/ 198 ual chi' C*II 0lave not yet discovered

T7,55>C51; 198 0ingle chi' TI*,,1:TI Car com'uter

T7,55>C515 198 0ingle chi'" 0ci TI*/, !C #e'laces T7,/,*

T7,55>C518 198 0ingle chi' C2 not yet discovered

T7,55>C519 198 0ingle chi' !C 7rogrammer%ase*8 and %ase*1+calculator



T7,5+>C551 1981 ual chi'" 0ci TI*5 2aster0cientific with com'lexnum%ers

T7,5+>C55/ 198/ ual chi'" in ;*5" ;*55 ull financial" , ste's

T7,5+>C55 198/ ual chi'" in ;*5" ;*55 ull financial" , ste's

T7,5+>C555 1981 ual chi'" 0ciTI*5" TI*55II" TI*5!C 0lave

ull scientific

T7,5+>C55+ 1981 ual chi'" 0ci TI*55 II 2aster ull scientific" 5+ ste's

T7,5+>C55 198 0ingle chi'" 0ci TI*/5 #e'laces T7,/

T7,5+>C55 198+ 0ingle chi'" 0ci TI*/, 0tat #e'laces T7,/

T7,5+>C558 198

0ingle chi'"

Cloc&

TI*,,, (Time

2anager) ull larm Cloc&

T7,5+>C559 198 0ingle chi' TI*189, (Converter) G0>I0 converter

T7,5+>C5+, 198 0ingle chi' TI* not yet discovered

T7,5+>C5+1 198 0ingle chi' C*8,,Cassette Interface for TI*

88

T7,5+>C5+ 198 ual chi' C*II 2aster not yet discovered

T7,5+>C5+/ 198 ual chi' C*II 0lave not yet discovered

T7,5+>C5+ 198 0ingle chi' TI*,,1:TI Car com'uter

T7,5+>C5+5 198 0ingle chi'" 0ci TI*/, !C" TI*/, III #e'laces T7,/,*

T7,5+>C5++ 198 0ingle chi' 2icrowave Controller o's

T7,5+>C5+8 198 0ingle chi' C2 not yet discovered

T7,5+>C5+9 198 0ingle chi' !C 7rogrammer%ase*8 and %ase*1+calculator

T7,5+>C5, 198 0ingle chi' !C !ittle 7rofessor ducational toy

T7,5+>C51 198 0ingle chi'" in ;*/5 ull financial

T7,5+>C5 198 ual chi'" 0ci TI*5 !C 2aster ull scientific" , ste's

T7,5+>C5/ 198/ ual chi' 7C*,, 7rinter for TI*++ and ;*



55

T7,5+>C5 198/ ual chi' 7C*,,7rinter for TI*++ and ;*55

T7,5+>C+1 198+ ual chi'" 0ci TI*+, 0lave ull scientific" 8 ste's

T7,5+>C+1+ 198+ 0ingle chi' 2ath0tar ducational toy

T7,5+>C+1 198 ual chi' TI 0'elling ; ducational toy

T7,5+>C+18 198 ual chi' TI 0'elling ; ducational toy

T7,5+>C+/1 1989 0ingle chi'2ath...To:oO"

7rofessor 1../ducational toy

T7,5+>C+/ 1989 0ingle chi'

Time...To:oO"

7rofessor Time ducational toy

T7,5+>C+// 1989 0ingle chi' 3ords...To:oO ducational toy

T7,5+>C+/ 1989 0ingle chi' 7rofessor ;C ducational toy

T7,58>C8,5 198 ual chi'" 0ci TI*+5 0laveull scientific" 1,, ste's"

Timer

T7,58>C8,+ 198 ual chi'" 0ci TI*+5 2asterull scientific" 1,, ste's"

Timer

T7,58>C8,8 198+ ual chi'" 0ci TI*/, :alaxy ull scientific

T7,58>C81, 198+ ual chi'" 0ci TI*+ :alaxy 2aster ull scientific" 1,, ste's

T7,58>C811 198+ ual chi'" 0ci TI*+ :alaxy 0lave ull scientific" 1,, ste's

T7,58>C81 198 0ingle chi'" in ;*III ull financial

T7,58>C815 198+ ual chi'" 0ci TI*+, 2aster ull scientific" 8 ste's

T7,58>C81+ 1988 0ingle chi'" 0ci :alaxy Kunior ducational calculator

Failed C-(! single chip calculators

I' ,o% dig d##p into th# &a)&%)ator r#)at#d pat#nts 'i)#d *, T#$as Instr%m#nts and no0

a*o%t th# m,st#r, TI("" &a)&%)ator ,o%)) dis&o7#r t0o additiona) d#7i&#s:



P T7,85 with CD%*'$"C9, and C9,/

P T7,5/," T7,5/1 and T7,5/ with CD+,'% and C5,/

Un'ort%nat#), 0# dont no0 m%&h a*o%t th#m. Th# pat#nt app)i&ation is &#nt#r#d aro%nd a

8Data pro&#ssing s,st#m int#grat#d &ir&%it ha7ing mod%)ar m#mor, add(on &apa&it,9 and

d#s&ri*#s a TMS1+++ &hip 0ith di''#r#nt s)i&#()in#s to prod%&# ar#a(otimiF#d &hips 0ithadopta*)# m#mor, siF#. A&&ording to th# pat#nt th# ROM(siF# 7ari#s *#t0##n 1 0ords and

4 0ords= th# RAM(siF# s##ms to *# *#t0##n ;3 and 4 *,t#s.

Th# insid# 7i#0 o' a TI("" gi7#s ,o% som# &hips *%t 0itho%t d#stro,ing th# &a)&%)ator 0#

ar#nt a*)# to r##ngin##r it. On# G%#stion is sti)) op#n: h#r# ar# th# 3+ programming

st#ps o' a TI("" stor#d Its a pit, that th# TI("" n#7#r got th# 'ina) appro7a) 'or

prod%&tion...


T7,85>C9,1C 198 2ulti chi'" 0ci TI*88 not yet discovered

T7,85>C9,1 198 2ulti chi'" 0ci TI*88 not yet discovered

T7,85>C9,C 198 2ulti chi'" 0ci TI*88 not yet discovered

T7,85>C9,/ 198 2ulti chi'" 0ci TI*88 not yet discovered

T7,5/, 198 2ulti chi'" 0ci TI*88 not yet discovered

T7,5/1 198 2ulti chi'" 0ci TI*88 not yet discovered

T7,5/>C5, 198 2ulti chi'" 0ci TI*88 not yet discovered

T7,5/>C5,/ 198 2ulti chi'" 0ci TI*88 not yet discovered

Display dri"ers

;efore the real single*chi' calculators a''eared the ! dis'lays were connected to digit

drivers and on the first designs to additional segment drivers.


0N591 19 segment driverTI*5,, Introduced with the

T20,1,

0N59 19 + digit driverTI*5,, Introduced with the

T20,1,

0N59/ 19 segment driver 0#*1, a&a 0N" 0N915



0N59 19 + digit driver 0#*1, a&a 0N/" 0N91

0N59 19 digit driver 0#*5, a&a 0N88

0N598 19 9 digit driver

If you have additions to the a%ove article 'lease email4 -oergXdatamath.org.

Y Kuergen o%rins&i and Koerg 3oerner" Kanuary 1/" ,,1. No re'rints without written 'ermission.

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