ar2000jp
Joined: Feb 28, 2007
Posts: 3
From: Jordan
PM |
I have a few technical questions about SE P900, I've got some answers but I'm not sure if they're right, and would really appreciate it if anyone could answer them for me.
Let's start:
1- What is the EROM? where is it? what is it's physical address? and what is it's size?
I heard that it means Extended ROM, it has the boot & the upgrade code, and it's about 128K Bytes.
2- What is ROM? where is it? what is it's physical address? and what is it's size?
I heard that it's the first thing the CPU reads, it has the initial boot code, it's in the CPU chip, it's physical address is 00000000.
3- What is the boot sequence of the P900?
I heard it's like this:
- CPU reset
- jump to ROM
- jump to EROM
- jump to FIRMWARE
4- Where is the GDFS?
5- What is the "Phone" flash for?
I heard it's for the GSM part (AVR CPU).
6- How many CPUs does the P900 have? what do they do?
I heard it has 2 CPUs, one ARM9, one AVR, ARM9 for Symbian part, AVR for GSM stuff.
Any other info, dumps of ROM or EROM, schematics, CID info, platform info (like platform number, e.g. DB20xx) is really appreciated. |
Posted: 2007-03-10 13:22
