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* [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/dunfield/calc/h/tekm31.jpg Tek 31 picture] / [http://www.classiccmp.org/dunfield/calc/h/tekm31b.jpg back side] | * [http://classiccmp.org/dunfield/calc/h/tekm31.jpg Tek 31 picture] / [http://www.classiccmp.org/dunfield/calc/h/tekm31b.jpg back side] | ||
<gallery> | |||
Tek 31 1.jpg | |||
Tek 31 2.jpg | |||
Tek 31 3.jpg | |||
</gallery> | |||
[[Category:Computers]] | [[Category:Computers]] | ||
[[Category:Introduced in 1973]] | [[Category:Introduced in 1973]] |
Revision as of 17:02, 5 October 2018
The Tektronix 31 is a programmable desktop calculator. It features program branching and a complete set of transcendental functions.
It is built around a custom LSI chip set.
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.
Manuals
- Tektronix 21 and 31 Preliminary Manual (PDF, needs OCR)
- Tektronix 21 and 31 calculators interfacing information
Links
- 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