Linux User & Developer, Issue 166

Linux User & Developer Issue 166This month’s Linux User & Developer includes a¬†review of the Cubietruck Plus – also known as the Cubieboard 5 – I previously reviewed in Custom PC Issue 154.

CubieTech’s latest design, the Cubietruck Plus borrows the overall design from its predecessor but swaps out the weedy dual-core Allwinner A20 processor for an altogether beefier H8 octa-core chip. Kindly supplied for review by low-power computing specialist New IT, I was eager to put the board through its paces – especially as previous octa-core single-board computer (SBC) designs have suffered from some reliability issues when fully loaded for extended periods.

Sadly, as with my earlier review, there’s one piece of information which didn’t come to light prior to the deadline: devices, including single-board computers, based on Allwinner chips and using the company’s modified Linux kernel source have been found to suffer from a back-door which allows any process running on the system to silently and immediately gain root-level (superuser) privileges. While it doesn’t allow for remote execution, it can make existing bugs more readily exploitable – and if you’re using the Cubietruck Plus or any other Allwinner-based device, it’s worth checking to see if you’re affected.

This aside, the Cubietruck Plus certainly impressed during both reviews – though if you want to find out if I think it justifies its considerable price premium over the four-core Raspberry Pi 3, you’ll have to pick up a copy of the magazine from your local newsagent, supermarket, or digitally via Zinio or similar services.

Custom PC, Issue 154

Custom PC Issue 154In this month’s Hobby Tech column I take a good long look at the BBC micro:bit, CubieTech’s latest Cubietruck Plus (Cubieboard 5) single-board computer, and a pack of Top Trumps-inspired playing cards based on vintage computers.

Beginning with the micro:bit, I was lucky enough to be on the receiving end of a press sample when the much-redesigned educational device was finally ready to ship to schools across the UK. Based on the ARM Cortex-M0 microcontroller and boasting integrated Bluetooth Low Energy (BLE), the micro:bit’s main selling point is its excellent support: the web IDE includes four languages suitable for everyone from absolute beginners to experts, there is documentation galore, and the BBC’s TV output includes shows which remind me of the glory days of the BBC Micro and its related programming.

At least, that would be a selling point if the board was actually up for sale. Despite having now mostly fulfilled its promise to ship free micro:bits to all Year Seven pupils in the UK, the BBC has still made no announcement about commercial availability for the educational gadget. Those whose appetites are whetted by the review, then, are best off looking at the CodeBug on which the micro:bit was based, or the new Genuino/Arduino 101 if Bluetooth LE support is a requirement.

The Cubietruck Plus, meanwhile, is an altogether different beast. Kindly supplied by low-power computing specialist New IT, the board is – as the name suggests – a follow-up to CubieTech’s original Cubietruck. The old dual-core processor is long gone, replaced with an Allwinner H8 octa-core chip that blazed through benchmarks with aplomb – and without hitting the boiling-point temperature highs of the rival Raspberry Pi 3.

Sadly, there’s one piece of information that didn’t make it into the review: shortly after the issue went to press, security researchers discovered a debug vulnerability left in Allwinner’s customised Linux kernel which allows any application on the system to gain root permission. Although affecting only selected operating systems, it’s something to be aware of if you’re in the market for an Allwinner-powered SBC.

Finally, the playing cards. Created by start-up 8bitkick following a successful Kickstarter campaign, the deck is nostalgia in a box. The idea is to bring the Top Trumps concept of collectable, trivia-esque comparison gaming to vintage computing: the cards feature everything from the Acorn Atom to the TI-99/4A, plus a joker in the deck in the form of the Raspberry Pi 2 Model B.

The cards are printed with a very high quality finish, but it’s the source of the images that is of most interest: rather than take the pictures itself, 8bitkick has instead scoured the web for images in the public domain or licensed as Creative Commons. It’s no theft, though: while most Creative Commons licenses allow for even commercial reuse if properly attributed, 8bitkick has promised to upload¬†the full deck design to its website for free download and printing.

All this, plus lots of interesting things by people who aren’t me, is only a short trip to the newsagent’s away – or you can stay exactly where you are and grab a digital copy from Zinio or similar services.