Linked by Moochman on Tue 24th May 2011 21:11 UTC
PDAs, Cellphones, Wireless MeetMeego.org has the dirt on the details of Nokia's next two MeeGo devices [German]. To sum up: the first device, the (very) long-awaited N9, has a similar design to the N900 - a horizontal sliding 4-line keyboard, but this time with a tiltable screen, a 1GHz ARM Cortex A8-based processor, a 12MP camera with Carl Zeiss lens, and HDMI out. It will be a developer device, distributed at developer conferences such as the MeeGo Conference in San Francisco in a couple of days.
Permalink for comment 474564
To read all comments associated with this story, please click here.
RE[11]: Obsolete
by VZsolt on Wed 25th May 2011 14:53 UTC in reply to "RE[10]: Obsolete"
VZsolt
Member since:
2008-10-31

There's a book titled "Symbian OS Internals" detailing how exactly this kind of stuff works with Symbian.

In short, in case of Nokia phones: Nokia's internal OS (sometimes called as ISA or domestic OS) runs below/aside Symbian and handles everything radio- and otherwise hardware-related events and processes. The two OSs communicate with each other through IPC. Look up NokiaTSY for example, if you can find the Symbian Foundation sources - this component was opensourced too.

Earlier dual-core CPUs ran the DOS and Symbian on the two cores. It was an actual evolutionary (more like cost-cutting) step to share a single application processor among the two systems. An advantage was the cost, a disadvantage is that if either OS enters a busy wait cycle, it can starve the other, resulting in either slow network speeds, slow telephony event handling (like Symbian freezing for seconds after a hangup), lags and whatnot.

It is speculated in the book, that later Symbian would take over radio handling, ruling out the domestic OS. But that didn't happen as far as I know, not on the current S^3 generation at least.

BTW, this Nokia-internal OS is also working on the N900 (see phonet) and all the S40 devices. I'm not really sure about the S40 architecture but you can imagine the picture.

Reply Parent Score: 2