computer science

Philips :YES

Philips :YES 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 Philips :YES rather than just read about it. In short: The Philips :YES was a home computer/personal computer released by Philips Austria, in 1985. It was not fully IBM PC compatible, a reason given for its commercial failure.

Key takeaways

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

Reference excerpt

The Philips :YES was a home computer/personal computer released by Philips Austria, in 1985. It was not fully IBM PC compatible, a reason given for its commercial failure. The system was only sold in limited quantities.

Technical specifications Microprocessor: Intel 80186 @ 8 MHz ROM: 192 KiB RAM: 128 to 640 KiB Keyboard: mechanical, with 93 keys Operating system: DOS Plus (in 64 KiB ROM), MS-DOS, Concurrent DOS Storage: two 3½-inch drives, 720 KiB each. One or two optional external 3½-inch or 5¼-inch drives. Video modes: A0: Text, 40 columns × 25 rows, 8 colours A1: Text, 80 columns × 25 rows, 8 colours A2: Text, 80 columns × 25 rows, 2 colours + intensity G0: 160 × 252 pixels, 16 colours G1: 640 × 252 pixels, 2 colours + intensity G2: 320 × 252 pixels, 16 colours G3: 640 × 252 pixels, 4 colours The built-in graphics hardware (based on the Hitachi HD46505SP video controller) supported composite video output. An additional video module allowed output to TTL monochrome monitors, colour monitors or SCART televisions. Video RAM was shared with system RAM. Before using graphics modes, memory had to be allocated for them with the GRAPHICS or GRCHAR commands. An expansion card (the Professional Expansion Board) provided:

Extra RAM. A SASI/SCSI hard-drive interface. A mouse interface. A battery-backed real-time clock. An additional expansion card was available in limited quantity (probably only sold in the Netherlands directly to Philips employees) to make it 100% IBM PC compatible. This card was made of two separate cards, one for the actual compatibility, which ended in an 8 bit ISA slot, where an Hercules Graphics Card monochrome video card was plugged in. This also meant that using this card, would require to plug the monitor into the new video card, bypassing the onboard graphical card. This expansion card made it possible to run all DOS programs (including popular games at that time).

Operating system versions Known operating systems adapted for the Philips :YES include:

DOS Plus 1.? in ROM (with BDOS 4.1). The BDOS in ROM does not implement the S_OSVER call, which would have returned the version number to display. DOS Plus 1.1 on disk (with BDOS 4.1) DOS Plus 1.2 on disk (with BDOS 4.1) DOS Plus 2.1 on disk (with BDOS 5.0) Concurrent DOS MS-DOS 2.?? MS-DOS 3.10

Popular software WordPerfect 4.2 Microsoft Windows 1.02

See also Rodime (manufacturer of internal hard disk) MSX-DOS

References

Worked examples

Example 1 — a first encounter with Philips :YES

Start with the simplest possible case. Write down what Philips :YES 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 Philips :YES 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 Philips :YES 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 Philips :YES

In research: Philips :YES 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 Philips :YES 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: Philips :YES is common in secondary-school and first-year university syllabi. It links to neighbouring topics Computer-related introductions in 1985, Computer hardware stubs, Personal computers, so understanding it makes those chapters shorter.
In everyday life: Look for Philips :YES 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 Philips :YES in 20 minutes

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

Frequently asked questions

What is Philips :YES in simple terms?

The Philips :YES was a home computer/personal computer released by Philips Austria, in 1985. It was not fully IBM PC compatible, a reason given for its commercial failure.

Why does Philips :YES 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 Philips :YES?

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 Philips :YES.