Symbol PDT 1100, Product Reference Manual

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3-5
System Configuration
Flash ROM
Unlike RAM, the flash ROM retains stored programs and data regardless of the voltage
level of the lithium battery. The flash ROM limits the quantity of file rewriting operations to
10,000 times. After this, rewriting is no longer possible. Do not rewrite the flash ROM more
than once a day.
You can write data onto the flash ROM to:
• Download a file in System Mode
• Copy a file from RAM in System Mode
• Download a file using XFILE statement in BASIC 3.0 Interpreter.
You cannot write data scanned with the PDT 1100 onto the flash ROM.
In System Mode, the flash ROM appears on the LCD as "DRIVE B" or "B:". Names of files
stored in the flash ROM are prefixed by "B:".
Software Structure
The System Program is located in the system area of the flash ROM. To use extension
programs and user programs, download the program files into the user area of the flash
ROM or RAM.
Before executing user programs, prepare a data file. Data files are stored in the user area
of the flash ROM or RAM.
Figure 3-2. ROM and RAM Storage Areas
User Area
System Area
System Programs Extension
Programs Program
files Data files Extension
files Program files Data files
Terminal RAM Terminal ROM
User Programs User Programs
Host Computer
Download to terminal