R-Comp Interactive's ARMini is a modern, British-built desktop PC designed to run the ARM chip's original operating system, RISC OS. It isn't a completely new machine; rather, it's a custom bundle of a Beagleboard and various bits of supporting hardware inside a mini-ITX case, together with a customised build of RISC OS. The aim is to provide a smooth experience to existing RISC OS users.
A typical user environment?
At £599, the ARMini is more expensive than the basic model of the considerably smaller and more powerful Apple Mac mini – and you don't get a lot of hardware for your money. The case is slightly larger than an external 5.25in drive, and alongside a lot of empty space, there's the tiny 3in square motherboard, an HDMI-to-DVI adaptor, a USB hub and an 8GB thumbdrive.
A slimline internal DVD-RW drive is now included for no extra cost, although our review unit was the earlier model that lacked one. There's also 14cm-long external power brick.
The main board is the higher-spec Beagleboard-xM – 1GHz Cortex-A8 CPU, 512MB Ram, on-board Ethernet – running the shared-source RISC OS 5. Together, the storage and Ram provided aren't much in 2012, but then, by modern standards RISC OS is not merely tiny but minute, as are its apps. Even with a suite of freeware and some demo files, only about 750MB of the thumbdrive was occupied. RISC OS itself lives on a micro-SD card in a slot on the Beagleboard.
It's not a lot just shy of £600, but what you're paying for is integration. The review unit came preloaded with RISC OS 5.17 from RISC OS Open Ltd, the company behind the freeware shared-source version, but R-Comp offers a free download that upgrades the machine painlessly to 5.18, together with updates for the bundled apps. I also tried an upgrade to the experimental 5.19 and it worked flawlessly.
The ARMini includes licences from both Castle – owner of RISC OS 5, the shared-source fork – and RISC OS Ltd, vendor of RISC OS 6, the proprietary commercial version. Although you're not running the commercial RO6, R-Comp's build of RO5 includes some enhancements taken from it – so, for instance, when you change screen mode, a confirmation dialog box appears and the machine times-out and automatically reverts goes back if you don't click one.
The RISC business
This is a handy addition – RISC OS's screen-mode support is a bit palaeolithic. It can't read your monitor's capabilities over EDID and the Beagleboard's GPU is working at the outer limit of its abilities driving a big modern flatscreen, so invalid mode settings and an unusable display are a real risk. Indeed, in testing, I found I could only get a display with an HDMI cable – using the DVI port yielded no picture.
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So much possibility so far till payday :(
Re: *I think I paid around £27 with vat and shipping.
"When I give up smoking I'm guna buy Raspberries instead!"
IF you live that long !
> "It’s not entirely clear to me why the Beagleboard is so expensive ... "
We are told the Pi took 6 years to develop. I'm guessing that during the time the developers had proper jobs and regarded the Pi as a sort of altruistic hobby. It definitely wasn't going to be a source of income during those years.
Consequently all the time and resources used for the development process are a sunk cost and don't have to be recouped from the unit-price of the eventual product. That's what makes the Pi different from commercial offerings. In these cases the years (or more likely: months, for time is money) of developer time has to be paid for - in salaries, equipment and facilities.
We also know that given a large enough production run (say for a mobile phone) these costs don't add a great deal to each board when you're producing a million of them. Even less if all you have to do is add new features/power to an existing design. However for a low-sales, niche market that only produces one-hundreth the number of units, those same costs will contribute 100 times as much to the price of each board made.
Maybe the longest lasting legacy of the Pi won't be introducing children to little motherboards, but will be the creation of a low-cost, open sourced basis for future embedded hardware.
My RasPi should arrive this week...
Looking forward to it - at the very least, the Pi will make a decent cheap Linux machine to experiment with, and hopefully more. (I'm holding out for a "TV PC", though I realise this is basically a development board, often with alpha-level drivers to match, so I'm managing my expectations.)
Just wanted to mention another distro for the Pi: Arch Linux/ARM, which I understand is pretty mature as ARM Linuxes go - it's been running on machines like the SheevaPlug for some time now. I'm planning to use Arch with the Pi, as I have some experience from running Arch/x86 on my Eee 701SD netbook.
That said, I wouldn't mind giving the open RISC OS a spin :-)
>The ARMini is considerably quicker than the Raspberry Pi, which despite a powerful GPU has >only 256MB of Ram and a 700MHz ARMv6 core
Which is only a problem if you run today's software where everything has to be portable, virtualised or abstracted.
There's people doing amazing things with 20Mhz ATMega chips with 64kb flash.