computer science

TK83

TK83 is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand TK83 rather than just read about it. In short: The TK83 was a home computer produced by the Brazilian company Microdigital Eletrônica Ltda. and introduced in August 1982. By December 1984, it was no longer being advertised by Microdigital, being discontinued in 1985.

Key takeaways

TK83 belongs to computer science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect TK83 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of TK83 from memory before moving on to harder problems.

Reference excerpt

The TK83 was a home computer produced by the Brazilian company Microdigital Eletrônica Ltda. and introduced in August 1982. By December 1984, it was no longer being advertised by Microdigital, being discontinued in 1985. The TK83 was a clone of the Sinclair ZX81, and can for all practical purposes, be considered a version of the TK82C with repagged memory and including the SLOW function which permitted the video be shown during processing.

General information The TK83 had the Zilog Z80A processor running at 3.25 MHz, 2 KB RAM (expandable to 64 KB) and 8 KB of ROM that included the BASIC interpreter. The keyboard was made of layers of conductive (membrane) material and followed the Sinclair layout with 40 keys. Video output was sent via a RF modulator to a TV set tuned at VHF channel 3, and featured black characters on a white background. The maximum resolution was 64 x 44 pixels, based on semigraphic characters useful for games and basic images (see ZX81 character set). There was one expansion slot at the side of the machine, a cassette interface (data storage in tapes at 300 to 4200 baud, with audio cables were supplied with the computer for connection with a regular tape recorder) and a DIN joystick connector.

References

Illustrations

Worked examples

Example 1 — a first encounter with TK83

Start with the simplest possible case. Write down what TK83 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to TK83 before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about TK83 ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of TK83

In research: TK83 appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses TK83 in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: TK83 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Computer-related introductions in 1982, Computer hardware stubs, Goods manufactured in Brazil, so understanding it makes those chapters shorter.
In everyday life: Look for TK83 outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study TK83 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what TK83 means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain TK83 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is TK83 in simple terms?

Why does TK83 matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study TK83?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on TK83.