computer science

LZ Color 64

LZ Color 64 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 LZ Color 64 rather than just read about it. In short: The Color 64 was an 8-bit home computer produced in Brazil by the Rio de Janeiro company Novo Tempo / LZ Equipamentos between 1983 and 1986. It was one of the many machines based on the TRS-80 Color Computer introduced during the Brazilian "Market Reserve", like the Codimex CD-6809 or Prológica CP 400 COLOR.

Key takeaways

LZ Color 64 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 LZ Color 64 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of LZ Color 64 from memory before moving on to harder problems.

Reference excerpt

The Color 64 was an 8-bit home computer produced in Brazil by the Rio de Janeiro company Novo Tempo / LZ Equipamentos between 1983 and 1986. It was one of the many machines based on the TRS-80 Color Computer introduced during the Brazilian "Market Reserve", like the Codimex CD-6809 or Prológica CP 400 COLOR.

History Launched in mid-1983, the Color 64 was the second Brazilian TRS-80 Color Computer clone. The production line was installed in the old premises of Cervejaria Skol in Rio de Janeiro. Due to its graphic and sound capabilities, Novo Tempo/LZ developed the "Computational Resources Switch" ("Comutador de Recursos Computacionais"), a piece of hardware designed for the educational market, allowing the creation of a small computer network. With it, a teacher could control ten other Color 64s, sharing programs and a printer. Despite being one of the first TRS-80 Color clones in Brazil, its success was limited to the Rio de Janeiro state, due to limited marketing in the rest of the country. According to Folha de S.Paulo, the Color 64 had a retail price of 1.2 million Cr$ in July 1984. To publicize TRS-80 Color Computers in Brazil and increase Color 64 sales, Novo Tempo/LZ encouraged the creation of user clubs in Rio de Janeiro. The largest one was "Clube Color", operating on the premises of the Micromaq software house. Production of the Color 64 was discontinued in 1986, with the arrival of MSX machines offering better color and sound capabilities.

Technical features The basic features of the LZ Color 64 are similar those of the TRS-80 Color Computer.

CPU: Motorola 6809E, 890 kHz to 1.8 MHz Memory: ROM: 16 KB (containing Color BASIC and Extended Color BASIC) RAM: 64 KB Keyboard: Built-in, 53-keys Display: Motorola 6847, 9 colors Text mode (with 32 x 16 characters) Low resolution graphics (with 64 x 32 pixels) Medium and high resolution graphics (up to 256 x 192 pixels, 2 or 4 colors) Expansion port (cartridges, disk interfaces, etc.) Other ports: Composite video monitor (PAL-M color TV using an external modulator) RS-232C serial port Analogue or digital joysticks Cassette recorder (1500 baud, with remote engine control)

See also Motorola 6809 CP 400 COLOR Codimex CD-6809 TRS-80 Color Computer

References

Illustrations

Worked examples

Example 1 — a first encounter with LZ Color 64

Start with the simplest possible case. Write down what LZ Color 64 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 LZ Color 64 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 LZ Color 64 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 LZ Color 64

In research: LZ Color 64 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 LZ Color 64 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: LZ Color 64 is common in secondary-school and first-year university syllabi. It links to neighbouring topics 6809-based home computers, Computer-related introductions in 1983, Computer hardware stubs, so understanding it makes those chapters shorter.
In everyday life: Look for LZ Color 64 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 LZ Color 64 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what LZ Color 64 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 LZ Color 64 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is LZ Color 64 in simple terms?

Why does LZ Color 64 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 LZ Color 64?

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 LZ Color 64.