software - What operating systems run on today's DSLRs?

I was just wondering if anyone could provide names and a bit of background on the Operating Systems the current day DSLRs (namely, Nikon, Canon) use.

Answer

Canon

So far what we know based on ML work

DRYOS version 2.3, release #0023

1. 5Dm2


2. 500d/T1i


3. 50D

DRYOS version 2.3, release #0039

1. 7D


2. 1Dm4

DRYOS version 2.3, release #0043

1. 550d/T2i

DRYOS version 2.3, release #0044 or #0049

1. 5dm3


2. EOS M

DRYOS version 2.3, release #0047

1. 60D


2. 600D/T3i


3. 1100D/T3

I'm generalizing but I see in Canon P&S they tend to reuse DIGIC processors so a quick check on a Wiki indicated that DRYOS is used.

It isn't specifically mentioned but ML developers indicate that they think this DRYOS is a derivative of uLTRON. They also did indicate that some concepts in DRYOS could be compared to or understood from VxWorks.

Sony

BusyBox 1.4.2 (Linux Kernel)

1. NEX-3


2. NEX-5


3. SLT-A35

BusyBox 1.13.4 (Linux Kernel)

1. SLT-A99


2. SLT-77


3. SLT-65


4. 
   

   NEX-7

   
   

   Sony firmware hacking project got it's own website at http://hackingalpha.wikia.com and forum at http://www.nex-hack.info/