[time-nuts] 5370 processor boards available

Didier Juges shalimr9 at gmail.com
Thu Feb 27 20:58:29 EST 2014


Now that you mention it, I have another small embedded system with 64MB of RAM that runs Linux 3.4 just fine off a flash drive, so running a RAM disk in 512MB should be feasible.

Didier KO4BB


On February 27, 2014 9:12:45 AM CST, Jim Lux <jimlux at earthlink.net> wrote:
>On 2/27/14 6:40 AM, Didier Juges wrote:
>> The BBB has 2GB of flash on board (non removable) and has a micro SD
>socket. Would not be too hard to keep a backup copy of the OS and apps
>on the SD card so that it would be easy to boot from SD and reload the
>built-in flash if the BBB fails to boot from the built-in image.
>>  Alternately, running the flash read only, copy OS, apps and
>everything else to a RAM disk and run from the RAM disk would probably
>be the safest. Not sure you can do that with 512MB of RAM without some
>serious pruning of the Linux kernel.
>>
>
>
>Back in 2004, I was running a stripped down linux off a small compact 
>flash (256MB or 512MB, I think) on a VIA Eden 700 MHz motherboard with 
>very limited RAM.  It included busybox to provide the usual command
>line 
>utilities. As I dimly recall, it booted from a compressed filesystem
>(on 
>CF) to ramdisk only. I also had a version of Debian that net-booted,
>and 
>also ran entirely in ram.
>
>I could probably dig it up if someone's interested.
>
>We run RTEMS (www.rtems.org) at work, which provides a Posix compliant 
>interface, but is designed for embedded systems, and has a bunch of 
>targets (ours is SPARC, but there's x86 versions, for sure).  You can 
>definitely fit that in well under 128 MB.
>
>We've found that most everything that compiles and runs under Linux
>will 
>compile/run under RTEMS, unless you're using something peculiar to 
>Linux, or you need dynamic loading/linking (RTEMS is statically
>linked). 
>  That is, we have very few "#ifdef LINUX" kind of things in our code.
>
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