I’ve started taking apart a Motorola 9505.
As I noted in a previous post, upgrading the firmware in the 9505 (not the 9505A) is very difficult to impossible.
I was looking into the possibility of a DIY, but it’s looking a bit difficult. Some bits I’ve found out about the 9505:
- Uses a custom ASIC from Atmel, the at56406
- Several custom Motorola parts
- Exposes a FFC on the rear for debugging similar to the Motorola 9500
- Has a ton of what appear to be debug pads on the main circuit board that are covered with tape.
May try to get a JTAGulator hooked up to this and see what I can see.
*#300# software versiom
*#301# keypad functions
*#303# set defaults
*#304# engineering mode
19980722 Ok master unlock code