Am Do 29. Mai 2008 schrieb Michael Shiloh: > > Mike (mwester) wrote: > > andrzej zaborowski wrote: > > ... > >> In terms of bottlenecks I'm sure the muxer is not one, neither is the > >> gsm module, if you want to use the usual serivces (GPRS/EDGE). I > >> think Harald did post some numbers from his experience in A780 project > >> where they actually have a working kernel-side TS0710 implementation > >> (written in a very A780 centric way unfortunately) including bit rates > >> at which the muxer potentially starts to be the bottleneck. Below > >> that it's just some wasted cycles from going to userspace and back > >> more than necessary. > > > > The Linux serial driver is an abomination in itself (the only saving > > grace is that it's largely compatible back to the days of the ASR33 > > teletype machine). IMO, if performance is the goal, we need to consider > > a custom high-speed serial driver for the UART connected to the GSM, one > > that gets rid of the overhead of the entire tty layer in the kernel. > > > I used to own an ASR33. How would I use it with my Neo if we accept your > suggestion? > > > :-) > > M > > p.s. it would have been quite a sight, an ASR33 connected via a Neo, > happily typing away with that wonderful sound only Teletypes can make... > >
well maybe we can start a project to abuse the headset jack and build a fancy adapter micbias->20mA. 20mA->HOLDbutton ;-) XD /j
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