computer science

Hardware-dependent software

Hardware-dependent software 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 Hardware-dependent software rather than just read about it. In short: Hardware-dependent software (HDS or HdS), the part of an operating system that varies across microprocessor boards and is comprised notably of device drivers and of boot code which performs hardware initialization. HDS does not comprise code which is only specific to a processor family and can run unchanged on various members of it.

Key takeaways

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

Reference excerpt

Hardware-dependent software (HDS or HdS), the part of an operating system that varies across microprocessor boards and is comprised notably of device drivers and of boot code which performs hardware initialization. HDS does not comprise code which is only specific to a processor family and can run unchanged on various members of it. The HDS is alternatively called the BSP, for Board Support Package, especially in the world of commercial operating systems where the processor family code is distributed in binary form only. Often software that runs on operating systems may be hardware dependent at first, but emulators can reduce dependencies for specific hardware.

See also Basic Input/Output System (BIOS) DeviceKit Embedded systems Firmware HAL (software) Hardware abstraction layer Machine-dependent software Programmable logic

References

Worked examples

Example 1 — a first encounter with Hardware-dependent software

Start with the simplest possible case. Write down what Hardware-dependent software 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 Hardware-dependent software 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 Hardware-dependent software 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 Hardware-dependent software

In research: Hardware-dependent software 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 Hardware-dependent software 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: Hardware-dependent software is common in secondary-school and first-year university syllabi. It links to neighbouring topics Booting, Computing terminology, Device drivers, so understanding it makes those chapters shorter.
In everyday life: Look for Hardware-dependent software 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 Hardware-dependent software in 20 minutes

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

Frequently asked questions

What is Hardware-dependent software in simple terms?

Why does Hardware-dependent software 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 Hardware-dependent software?

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 Hardware-dependent software.