Crestron CNX-DVP4 Operation Manual page 17

Crestron CNX-DVP4
Operations Guide – DOC. 8170A
Flash
The 4MB flash memory consists of approximately 1.5MB used for firmware, and
approximately 2.5MB available for SIMPL and SIMPL+. The files that reside in
flash conform to a flat directory structure.
1. SIMPL+ Modules.
2. SIMPL Program.
3. Operating System.
Non-volatile (NVRAM)
1. SIMPL+ Variables (using "nonvolatile" qualifier or
#DEFAULT_NONVOLATILE).
2. Signals explicitly written to NVRAM (by symbols such as Analog RAM,
Analog RAM from database, Serial RAM, Serial RAM from database,
Analog Non-volatile Ramp, Digital RAM, etc.).
NOTE: If you extract NVRAM values to a file (Viewport, File transfer | Save
NVRAM to File), to simplify restoring them in the event of file corruption or to
distribute to identical control systems, remember that NVRAM values are position
sensitive in the program. When saving the NVRAM is crucial to your application, it
is recommended to place all symbols and/or modules that use NVRAM at the
beginning of your program. When NVRAM (.nvr file) is re-installed, all the values
should line up with the program. If the program is modified, and logic is placed
before any symbols using NVRAM, the previously stored values will not line up and
your presets will have to be re-entered.
Volatile (DRAM)
NOTE: The DRAM memory runs all bit map files. To maximize loading speed of
backgrounds, keep the total page size to a maximum of 32 MB.
NOTE: To reduce the size of bit maps, make them 16 bit rather than 24 or 32 bit.
This will also reduce the load time of these files.
1. Digital, analog and serial signal values (except as noted above).
2. SIMPL+ Variables (Default if no options are specified, or if "volatile"
qualifier is used, or #DEFAULT_VOLATILE is used).
DRAM is used by the operating system for dynamic storage of variables, signals,
loading of pages and other constructs used at runtime. The actual amount of DRAM
used at any given time depends on the particular program that is running, i.e., usage
is variable, or dynamic, during normal operation.
NOTE: To check the size of the memory installed in the CNX-DVP4, use Viewport
and type the SHOWHW command.
Digital Video Processor
Digital Video Processor: CNX- DVP4 • 11