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P800/P802
White Paper, January 2003
18
P800 Memory Organisation
Data Storage Locations
The P800 is divided into two parts:
•
A GSM phone part, having flash memory. This is very similar to a conventional mobile
phone such as the T68i
•
An ‘Organizer’ part running Symbian OS and having a large amount of flash and RAM
memory plus a Memory Stick slot and ability to exchange files with a PC.
Note: The ‘Phone’ application which provides the phone MMI exists on the Symbian OS part of
the P800; the GSM stack resides in the GSM phone part.
The diagram below shows the memory organisation of a P800:
The RAM (Random Access) memory is controlled by the Symbian OS operating system and is
not used to store any user or program data. All use is dynamic and managed by the OS. The
RAM is totally re-initialised when the P800 is started.
Two banks of 16Mbyte flash memory are built into the P800, making a total of 32Mbyte. Flash
memory retains data even with no power applied. Unlike some PDA devices, the P800 does not
require a small ‘memory backup’ battery. Data stored on the P800 is therefore not subject to loss
due to such a battery running down.
The first bank is used like a ROM. It stores the Symbian OS (UIQ) operating system, the built-in
applications and some essential multimedia information like a default ring tone. It also stores the
language files for UK English. This is the default language of the P800.