We are very fortunate to have a copy of TI's firmware source code and a bunch of hardware and software documentation for the LoCosto GSM chipset (much of which is also applicable to the earlier Calypso) thanks to the ill-fated Peek mobile email device. That device was based on the LoCosto chipset (it was very similar to a standard cellular phone handset, but made to be text-centric instead of voice-centric), and when the company behind it met its demise like all companies of this sort do sooner than later, they publicly released all of their sources and docs just prior to going under. Just prior to its demise the Peek company had a site called sharing.getpeek.com (now defunct) on which they published a large package file named chipset.zip - we have recently located a copy of that file, and you can find it in the Peek subdirectory. (Other files in that subdirectory are additional pieces which we were able to scavenge from the remains of what once was the Peek developer community.) That public release occurred some time between 2010 and 2012, and the ware in question was downloaded from sharing.getpeek.com and reposted elsewhere by many unrelated people. I, FreeCalypso developer Space Falcon, only became aware of this fascinating history in May of 2013 when a stray Google search for "Condat GSM stack" led me to http://scottn.us/downloads/peek/ - some fellow's personal website containing bits that were extracted from Peek's chipset.zip release - although I did not discover the latter until March of 2015. LoCosto-scottn-peek-ware.tar.xz contains what I downloaded from ScottN's site via a recursive wget invokation on 2013-05-23. Not knowing the true origin of this ware until March of 2015, I regarded scottn.us as the point of origin from 2013-05 until 2015-03, and this LoCosto-scottn-peek-ware.tar.xz tarball served as the "authoritative source" for the FreeCalypso project during that time period. Now that we've located the original chipset.zip release from Peek, I have verified that ScottN's version is nothing more than an expansion of that ZIP package - hence its status as "the ultimate authoritative source" has been rescinded. :) Furthermore, a diff between the bits in LoCosto-scottn-peek-ware.tar.xz and our own expansion of chipset.zip shows that a few files are missing from ScottN's version, namely: SW doc/PSL1DOC/5.24-g23mdoc/sap/gen_bat.pl TCS3.2_N5.24_M18_V1.11_M23BTH_PSL1_src/L1/layer1/tools/gen_intram.pl TCS3.2_N5.24_M18_V1.11_M23BTH_PSL1_src/csw-system/drv_app/ffs/board/mktarget.pl TCS3.2_N5.24_M18_V1.11_M23BTH_PSL1_src/csw-system/os/nucleus/1_15/plus_specific/asm_defs.inc TCS3.2_N5.24_M18_V1.11_M23BTH_PSL1_src/g23m/system/busyb/tools/header_gen.pl TCS3.2_N5.24_M18_V1.11_M23BTH_PSL1_src/g23m/system/busyb/tools/make_cmd.pl These omissions from ScottN's version are a result of his httpd not serving these files for download because they end in .pl or .inc - a clear example of why it is a bad idea to publish such warez in an exploded form instead of tarballs or ZIP packages. Peek's chipset.zip release package is actually a ZIP containing nothing but other zips: BTh.zip -- Bluetooth stuff HW doc.zip -- self-explanatory Production test and calibration.zip -- ditto SW doc.zip -- ditto TCS3.2_N5.24_M18_V1.11_M23BTH_PSL1_src.zip -- firmware source Tool.zip -- mostly empty dirs inside :-( The bits in these inner ZIPs are not specific to Peek hardware or their application in any way - instead they form a reference platform delivery from TI to generic LoCosto customers. The comments inside indicate that this delivery was prepared for some entity named "FGW" - but we have no idea what it is or was. The only FGW we were able to find is First Great Western, which is a British railway company - so for a while I thought that we are looking at something that came from the railway GSM world. But I was told more recently that FGW may be the name of some Chinese company that acted as the ODM for Peek - so who knows... The FGW directory is our own repackaging for more convenient downloading. TCS3.2_N5.24_M18_V1.11_M23BTH_PSL1_src.zip (the most interesting piece), BTh.zip and Tool.zip (contains TMS470 compiler version 2.70 used to compile the TCS3.2_ firmware, but otherwise only a ton of empty directories, very disappointing) are posted verbatim from the expansion of chipset.zip; the contents of the other 3 inner ZIPs with docs (the ones with spaces in the original filenames) have been repackaged into LoCosto_hw_sw_docs.tar.xz.