computer science

Sam460ex

Sam460ex 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 Sam460ex rather than just read about it. In short: Sam460ex is a line of modular motherboards produced by the Italian company ACube Systems Srl. The machine was released in October 2010 and can run AmigaOS 4, MorphOS, AROS or Debian Linux (CruxPPC at first, and then Debian Squeeze or Ubuntu ).

Key takeaways

Sam460ex 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 Sam460ex to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Sam460ex from memory before moving on to harder problems.

Reference excerpt

Sam460ex is a line of modular motherboards produced by the Italian company ACube Systems Srl. The machine was released in October 2010 and can run AmigaOS 4, MorphOS, AROS or Debian Linux (CruxPPC at first, and then Debian Squeeze or Ubuntu ). The Sam460ex made its debut at the Vintage Computer Festival at Bletchley Park in the UK on 19 June 2010, where it was demonstrated to the public running AmigaOS 4.1 along with the Timberwolf web browser, a port of the Mozilla Firefox for the AmigaOS 4. Its hardware features were also showcased, with its SIM card slot and aerial, its ability to boot AmigaOS from SD card. In September 2011, Acube Systems introduced AmigaOne 500 based on Sam460ex mainboard.

Versions

Sam460ex FlexATX form factor (21.6 × 17 cm) AMCC 460ex SoC – passively cooled PowerPC 440 core up to 1.15 GHz and including a double precision floating point unit (FPU) Cache L1/L2: 32KB/256KB max 2 GB DDR2 SDRAM – 200-pin SODIMM up to 533 MHz Silicon Motion SM502 embedded MoC (audio/video) max 64MB video memory Audio 5.1 Realtek ALC655 codec PCI-express 4× lanes slot (v1.1, 16× mechanical connector) PCI-express 1× lane slot (mutually exclusive with the SATA2 port) PCI slot, 32 bit, 66/33 MHz, 3.3V 1× SATA2 port (mutually exclusive with the PCI-e 1× slot) 6× USB2 EHCI/OHCI ports 2× 10/100/1000 Ethernet ports SD card reader Serial port The SATA2 port and the PCI-e 1× slot are mutually exclusive, only one of them can be used at a time.

Sam460ex Lite The specifications are the same as for the Sam460ex, except for:

AMCC 460ex SoC clocked at 1 GHz Cache L1/L2: 32KB/256KB 512 MB DDR2 RAM

Sam460cr The specifications are the same as for the Sam460ex, except for: Absence of

Silicon Motion SM502 embedded MoC Audio 5.1 Realtek ALC655 codec Mutually exclusive 1× SATA2 port Users are expected to use graphics, sound and Sata interface cards with this model.

Reception Amiga Power magazine saw PCIe expansion for modern graphics cards, silent fan-less CPU operation, plenty of RAM and USB 2.0 as main advantages of the new Sam460ex board. However, the same review mentioned among weak points CPU speed, problems with audio on some motherboards and lack of 3D drivers for Radeon HD cards under AmigaOS. Reviewing AmigaOne 500, Amiga Future magazine highlighted supplied 2 GB RAM and overall system performance comparable to older Pegasos II computer, but criticized weak built in graphics chip recommending customers to buy dedicated graphics card.

Worked examples

Example 1 — a first encounter with Sam460ex

Start with the simplest possible case. Write down what Sam460ex 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 Sam460ex 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 Sam460ex 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 Sam460ex

In research: Sam460ex 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 Sam460ex 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: Sam460ex is common in secondary-school and first-year university syllabi. It links to neighbouring topics Amiga, Computer hardware stubs, Motherboard, so understanding it makes those chapters shorter.
In everyday life: Look for Sam460ex 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 Sam460ex in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Sam460ex 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 Sam460ex out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Sam460ex in simple terms?

Why does Sam460ex 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 Sam460ex?

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 Sam460ex.