Xerox® Security Guide for Entry Production Color Class Products 
March 2019   Page  7-38 
 
 
PCUI Non-Volatile Memory 
Additional Information: The controller operating system memory manager allocates memory 
dynamically between OS, running processes, and temporary data which includes jobs in process.  
When a job is complete, the memory pages in use are freed and reallocated as required by the OS. 
 
PCUI Volatile Memory 
OS, Boot code, 
Application code, 
Program constant 
data. Contains no 
user 
or job specific data. 
Contains machine 
specific data 
(hardware ID, system 
settings, real-time 
control parameters, 
print job control state, 
performance 
log information, 
usage counters). 
Contains machine 
specific data (System 
Admin password, 
user preferences). 
May temporarily 
contain non-image 
job specific (job 
name, size, etc) 
Content can be 
initialized to 
factory default 
values. 
Additional Information: The controller operating system memory manager allocates memory 
dynamically between OS, running processes, and temporary data which includes jobs in process.  
When a job is complete, the memory pages in use are freed and reallocated as required by the OS. 
 
 
Marking Engine Non-Volatile Storage 
N/A.  The marking engine does not contain any non-volatile storage. 
 
Marking Engine Volatile Memory 
N/A.  The marking engine volatile memory does not store or process user data.