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 <[email protected]> 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. > >_______________________________________________ >time-nuts mailing list -- [email protected] >To unsubscribe, go to >https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >and follow the instructions there. -- Sent from my Motorola Droid Razr 4G LTE wireless tracker while I do other things. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
