Juniper Systems Allegro CX Manual - Manual (Page 57)

Allegro CX Owner’s Manual 57
Internal Memory
The internal memory of the Allegro CX is confi gured much like
the memory in laptop computers. It consists of ROM (Read Only
Memory) and RAM (Random Access Memory).
Read Only Memory ( ROM)
ROM is used to store the Operating System and Utility programs.
Information in the ROM is electronically “burned” into a chip before
the chip is installed at the factory. Information stored in ROM can be
read or copied. It can only be altered with a special utility program
provided by the factory. The information stored in ROM remains
intact whether the system power is on or off.
Random Access Memory ( RAM)
The Allegro has various sizes of internal RAM. Often referred to as
the computer’s workspace, RAM is where programs are executed or
run. RAM can be written to, read from, erased, etc. Its storage ability
is temporary in nature, only holding information while the system
has power (although the Allegro does not have to be turned on).
If the battery pack is drained or power is interrupted for any reason,
everything stored in RAM is lost. The backup capacitor saves the
contents of RAM for a limited time while you change the battery
pack (see Chapter 2, Batteries, for details). You can use the Save
System utility to save the RAM fi le system and registry. Refer to
Chapter 4, Windows CE, System Save/Restore Utilities.
To see how much RAM is available for your use, complete the
following steps:
Tap on Start and select Settings | Control Panel | System |
Memory.
Subtract the In Use fi gures from the Allocated fi gures.
Adjust the amount of RAM allocated for storage memory versus
program memory according to your needs.
A message appears if you try to save a fi le that is too large for the
amount of RAM that has been allocated to storage memory or run a
program that requires more execution space than you have allocated
to program memory.
▲
▲
1)
2)
3)