3-Series Architecture; Memory And Directory Structure - Crestron 3 Series Reference Manual

3-Series Architecture

The following sections provide an overview of the architecture of a 3-Series
control system.

Memory and Directory Structure

A 3-Series processor has between 256 MB and 1 GB of built-in SDRAM
(synchronous DRAM) volatile memory. For more information regarding the
memory specifications for each 3-Series control system model, refer to the
appropriate product page at www.crestron.com.
Flash memory contains the file system inside the 3-Series control engine. The
3-Series processor also has 128kB of NVRAM (nonvolatile RAM). NVRAM contains
program variables that are retained after the loss of electrical power, while
volatile memory is lost.
Flash Memory
Flash memory for a 3-Series control system contains the following components:
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•
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The files that reside in flash memory confirm to a flat directory structure. The
following table details the overall file system:
3-Series Control System Directory Structure
TOP LEVEL
\
Reference Guide – DOC. 7150B
Operating system (.puf file)
SIMPL and SIMPL Sharp Pro programs
SIMPL+® programming modules
SECONDARY LEVEL
HTML
Nvram
ROMDISK/User/display
RM/RM2
Simpl/AppXX
Sys
User
DESCRIPTION
The root of the file system
Web pages
NVRAM legacy directory
Contains files for the onscreen display
Mounting point for external removal
media
Control system program files (where
XX is the program number)
Contains various system configuration
files
Provided for user-defined files
3-Series Control Systems • 3