[time-nuts] Low cost GPS module for < 100ns timestamping error
lists at rtty.us
Sun May 4 13:07:52 EDT 2014
Well some of us still have RSX-11M (and RSTS/E) code floating around …..
On May 4, 2014, at 12:30 PM, Jim Lux <jimlux at earthlink.net> wrote:
> On 5/4/14, 8:40 AM, Chris Albertson wrote:
>> Looks like this is all you'd need for most timing projects. Just add your
>> favorite OCXO and some wire.
>> The SPARC (not Spark) is actually a step up from ARM. It was developed by
>> Sun Microsystems (now Oracle) it is optimized for things like fast context
>> switching, multi tasking and so on, all the things done by operating
>> systems. The Sparc V8 does 128 bit floating point, (quad precision) I
>> wonder if 200Kb RAM is enough to run an older version of SunOS? (a BSD
> Not all SPARC V8s have FPU: the SPARC spec has a lot of flexibilty in implmentation: a lot of "if you want X, then it has to do the following things in the following way, but it's optional"
> There's multiprocessor versions. Versions with and without cache, versions with and without FPU, etc.
> If you want a POSIX compliant OS, then RTEMS will definitely fit in 200kbytes. Don't know about all the other options. I've never heard of a SunOS implementation on LEON, but there's a lot of weird stuff out there. You do want to make sure that whatever you use is reasonably complete and of a reasonably recent version (or at least one you're real familiar with).
> There are a fair number of "one-off" ports of some OS or another to the LEON, but which don't have any continuing support, bug fixes, or users to contribute. Imagine a grad student doing their thesis on "An implementation of RSX-11M supervisor mode on the LEON3-MP"... they get enough done to demonstrate that it works, and they graduate, and who has a bunch of RSX-11M software anyway.
>> Are these shipping yet?
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
More information about the time-nuts