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{{Instrument Sidebar | |||
The '''Tektronix 31''' | |manufacturer=Tektronix | ||
|model=31 | |||
|class=Computer | |||
|series=31 | |||
|summary=Programmable desktop calculators | |||
|image=Tek21-31.jpg | |||
|caption=Tektronix 21 and 31 calculators | |||
|introduced=1973 | |||
|discontinued=(?) | |||
|designers= | |||
|manuals= | |||
* [[Media:Tek 21 and 31 prelim.pdf|Tektronix 21 and 31 Preliminary Manual]] | |||
* [https://w140.com/tek_21_31_calc_interfacing.pdf Tektronix 21 and 31 calculators interfacing information] | |||
* [[Media:Tek 21 31 calculator interface preliminary.pdf|Tektronix 21 and 31 Preliminary Interfacing Manual]] | |||
* [[Media:070-1575-00.pdf|Tektronix 31 Operators Manual]] (OCR) | |||
* [[Media:P7001_Calculator_Aided_Measurements.pdf|P7001/31 Calculator Aided Measurements]] | |||
* [[Media:062-1642-00.pdf|Tektronix 31 PROM Preparation Instructions]] | |||
* [[Media:062-1593-00.pdf|Tektronix 31 Mathematics Program Library Volume 1]] (OCR) | |||
* [[Media:062-1644-00.pdf|Tektronix 31/10 Graphic Calculator System]] | |||
}} | |||
The '''Tektronix 21''' and '''Tektronix 31''' are programmable desktop calculators. | |||
They feature a complete set of transcendental functions. The 21 supports simple programs (sequences of keystrokes) whereas the 31 supports conditional branching and subroutines. | |||
Data can be stored on the magnetic tape cartridge, for example, the [[020-0082-00]]. | |||
Several interfaces were available: | Several interfaces were available: | ||
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The ''31/10 Graphic Calculator System'' was a bundle of a model 31 with a [[4010]]-1 graphics terminal, interface and software collection. | The ''31/10 Graphic Calculator System'' was a bundle of a model 31 with a [[4010]]-1 graphics terminal, interface and software collection. | ||
==Links== | ==Links== | ||
* [http://www.oldcalculatormuseum.com/tek31.html Tek 31 @ oldcalculatormuseum.com | * [https://www.oldcalculatormuseum.com/w-tek21.html Tek 21] / [http://www.oldcalculatormuseum.com/tek31.html Tek 31] @ oldcalculatormuseum.com / [http://www.oldcalculatormuseum.com/s-tek31.html Spec sheet] / [https://oldcalculators.wordpress.com/2010/05/ blog post] | ||
* [https://youtube.com/watch?v=cNy_hjOqnps Tektronix 31 Programmable Desktop Calculator running a counter program from tape] @ YouTube | * [https://youtube.com/watch?v=cNy_hjOqnps Tektronix 31 Programmable Desktop Calculator running a counter program from tape] @ YouTube | ||
* [http://classiccmp.org | * [http://dunfield.classiccmp.org/calc/h/tekm31.jpg Tek 31 picture] / [http://dunfield.classiccmp.org/calc/h/tekm31b.jpg back side] | ||
{{Documents|Link=31}} | |||
==Internals == | |||
The 21 and 31 are built around a custom LSI chip set, the 156-0243-00 Adder-Subtracter, 156-0238-00 Working Register Storage, 156-0239-00/156-0240-00/156-0242-00 Function Decoding, 156-0235-00 Microcode Routine Address ROM, 156-0231-00 through 156-0234-00 Microcode ROM/Next Address Latch, 156-0237-00 Timing and Constant Storage ROM, 156-0236-00 K Register Storage and 156-0241-00 A & C Operation Control ROM. These chips were manufactured by American Microsystems, Inc. as full custom parts. | |||
==Pictures == | |||
<gallery> | |||
Tek 31 1.jpg | |||
Tek 31 2.jpg | |||
Tek 31 3.jpg | |||
Tek 31 4.png | Tektronix 31 with custom function key overlay | |||
Tek 31 vt.jpg | |||
Tek_P7001_31_just_married.jpg|"Just married" advertising from 1973 | |||
</gallery> | |||
[[Category:Computers]] | [[Category:Computers]] | ||