Re: some links for Nokia N95

On Tue, Feb 23, 2010 at 08:21:21PM +0100, Benjamin Hagemann wrote: this is the application processor, not the baseband processor. All nokia phones that I've ever seen run a nokia-internal/custom baseband processor (sometimes referred as CMT). They have generations like DCT3, DCT4, DCT4+ or today something like BB4, BB5, ... As those processors are custom designs that are never sold to other companies, it is unlikely that any documentation has leaked. Thus, I doubt you will ever find sufficient information outside Nokia to understand them sufficiently to run custom software on them. The wider a particular baseband processor is used (i.e. the more handset makers use it), the higher the probability that documentation will have leaked. STMicro (and now ST-Ericsson) build a number of modem designs, including at least one design from Nokia. the dsp-bios once again runs on the application processor exactly, that's what I've been talking about :) So to be frank: If somebody wants to work on GSM baseband software: choose baseband processors that are old, originate from smaller [ODM] manufacturers. Modern baseband processors have crypographically signed code (and corresponding bootloaders), and its much more difficult to find any documentation and/or source. I personally believe the most attractive target after the Ti Calypso (and related) family is the Mediatek (MTK) family, i.e. MT622x based chipsets. There are literally hundreds of smaller chinese companies manufacturing the phones, and you can easily find schematics of the reference designs as well as data sheets / reference manuals of the baseband processor. Regarding the wiki: Please don't put information about random phones in it, as it will just add noise and raise the impression tha tthose phones are supported. Cheers, Harald -- - Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)