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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: | ||
Line 13: | Line 33: | ||
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]] | ||
Latest revision as of 23:05, 9 March 2024
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:
- Model 152 General Purpose BCD Interface
- Model 153 Tektronix Instrument Interface
- Model 154 RS-232C Interface
These connect to the calculator through a 50-pin card-edge bus interface supporting DMA access at up to 125 kbyte/s. The bus uses open-collector TTL drivers and can be daisy-chained through multiple peripherals (which all have two matching bus connectors for this purpose). It must be terminated at the last unit.
The 31/10 Graphic Calculator System was a bundle of a model 31 with a 4010-1 graphics terminal, interface and software collection.
Links
- Tek 21 / Tek 31 @ oldcalculatormuseum.com / Spec sheet / blog post
- Tektronix 31 Programmable Desktop Calculator running a counter program from tape @ YouTube
- Tek 31 picture / back side
Documents Referencing 31
Document | Class | Title | Authors | Year | Links |
---|---|---|---|---|---|
Tekscope 1974 V6 N3.pdf | Article | The 31/53 Calculator-based Measurement Instrumentation Package | John Mulvey | 1974 | 31 • 153 • DM501 • DC503 |
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
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Tektronix 31 with custom function key overlay
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"Just married" advertising from 1973