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[on:]

More on the rascal board... A quote from the Rascal home page
<<<""  The Rascal
Manufacturer: Rascal Micro
The Rascal is a small, open-source computer designed for connecting sensors, motors, and whatever else you can build to the internet. It's about 5 cm x 10 cm (2 inches by 4 inches).

Note that the current version for sale are early production units. They have no known hardware deficiencies, but they have not been tested as thoroughly as the typical consumer product. The only known software deficiencies are that the SPI and USB ports are untested. (The SPI drivers are in the kernel, but the userspace code doesn't exist yet.)

Be sure to buy a power supply and microSD card or your Rascal will not work.
$175.00 >>>""

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??? seems like a lot of money for a project/product still in pre-production testing", are we as users (Not ME Too Much Money) supposed to "Complete This Product/Project?
Also as a side note, with careful shopping and some creative engineering all the above could be done on a Raspberry Pi or a mega and Ethernet shield... for about 25% of the asking price of this device.
And the Pi is already a Linux device... @175.00.
Or did I miss something?

Doc

[Reply #1 on:]

Also, LINUX is not a good OS for controlling real world I/O for among other reasons its response time is not determinate.  If an OS is needed in an embedded environment, what is needed is a RTOS, real time operating system which can guarantee response times.

[Reply #2 on:]

LINUX is not a good OS for controlling real world I/O

http://en.wikipedia.org/wiki/RTLinux

[Reply #3 on:]

LINUX is not a good OS for controlling real world I/O

http://en.wikipedia.org/wiki/RTLinux

Just cause it calls itself LINUX doesn't mean it is.  The OS, which is the kernel, not all of the sundry tools is fundamentally different between LINUX and RTLINUX.  And it is the former that one finds on these devices.  For instance a device that implments RTLINUX will say it implements RTLINUX not simply LINUX...  And no LINUX is not a good OS for embedded use.