31: Difference between revisions
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|manuals= | |manuals= | ||
* [[Media:Tek 21 and 31 prelim no ocr.pdf|Tektronix 21 and 31 Preliminary Manual ( | * [[Media:Tek 21 and 31 prelim no ocr.pdf|Tektronix 21 and 31 Preliminary Manual]] (needs OCR) | ||
* [https://w140.com/tek_21_31_calc_interfacing.pdf Tektronix 21 and 31 calculators interfacing information] | * [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:Tek 21 31 calculator interface preliminary.pdf|Tektronix 21 and 31 Preliminary Interfacing Manual]] (needs OCR) | ||
* [[Media:070-1575-00.pdf|Tektronix 31 Operators Manual ( | * [[Media:070-1575-00.pdf|Tektronix 31 Operators Manual]] (OCR) | ||
* [[Media:P7001_Calculator_Aided_Measurements.pdf|P7001/31 Calculator Aided Measurements | * [[Media:P7001_Calculator_Aided_Measurements.pdf|P7001/31 Calculator Aided Measurements]] | ||
* [[Media:062-1642-00.pdf|Tektronix 31 PROM Preparation Instructions | * [[Media:062-1642-00.pdf|Tektronix 31 PROM Preparation Instructions]] | ||
* [[Media:062-1593-00.pdf|Tektronix 31 Mathematics Program Library Volume 1 ( | * [[Media:062-1593-00.pdf|Tektronix 31 Mathematics Program Library Volume 1]] (OCR) | ||
* [[Media:062-1644-00.pdf |Tektronix 31/10 Graphic Calculator System]] | * [[Media:062-1644-00.pdf|Tektronix 31/10 Graphic Calculator System]] | ||
}} | }} | ||
The '''Tektronix 21''' and '''Tektronix 31''' are programmable desktop calculators. | The '''Tektronix 21''' and '''Tektronix 31''' are programmable desktop calculators. | ||
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* [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://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] | ||
==Internals == | ==Internals == | ||
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Tek 31 2.jpg | Tek 31 2.jpg | ||
Tek 31 3.jpg | Tek 31 3.jpg | ||
Tek 31 4.png | |||
Tek 31 vt.jpg | Tek 31 vt.jpg | ||
Tek_P7001_31_just_married.jpg|"Just married" advertising from 1973 | Tek_P7001_31_just_married.jpg|"Just married" advertising from 1973 | ||
Revision as of 05:24, 13 October 2022
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.
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
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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"Just married" advertising from 1973
