After performing the 1st dump of a TI-Nspire CAS+ OS in
may 2012 and then
making those OSes installable, today is another great day!
The next greatest event in TI-Nspire CAS+ history has just occured: the first dumping of a TI-Nspire CAS+ Boot1, performed by myself with Goplat's help!
The Boot1 is the one coming with the P1-EVT2 CAS+ prototype I've had on loan from datamath .org for months/years, which was running OS 1.0.1.0.334T.
The method uses the RS232 console Datalight. This console is disabled on later models, so we'll need to find another method.
It's this Boot1 which is showing us
"Texas Instruments" instead of
"TI-Nspire" when booting on this prototype.
The Boot1 is stored in a 512KB Flash NOR ROM, like on later TI-Nspire:
As already seen in the RS232 bootlog from this prototype, the Boot1 is named
"Boot Loader Stage 1" and has no version number - it is simply identified by its build date: 27 February 2006.
Note that the CPU frequency of 78MHz is actually hard-coded into the Boot1.
Note also that Boot1 confirms the possibility of launching a diagnostics software, although its presence have never been confirmed so far on any CAS+.
Now that the first boot1 TI-Nspire CAS+ has finally been dumped, let's go on! 
Source:http://tiplanet.org/forum/viewtopic.php?f=43&t=10658
