HP 200 Series Services And Applications page 26

Architecture and Technology
Series 200 and 400 Hardware
Hardware Architecture
Figure 1. Block Diagram of Series 200/400 Hardware
CPU Most of the series 200 and 400 routers use the Motorola 68020,
68EC020, or 68EC040 processors.
The processor accesses three types of read-only memory (ROM) on the bus:
This stores the router operating system code.
Flash EEPROM
The use of flash EEPROM technology allows you to update the
operating system through the network or the console ports.
Self-Test EPROM This stores the router's self test and
console-downloading code.
Station ID PROM This stores the station (MAC) address for each of
the router's ports.
The processor accesses two types of random-access memory (RAM) on the bus:
Data RAM Program variables and data critical to packet throughput
(such as routing and bridging tables) are stored in a fast memory.
Battery-Backed RAM The router configuration is stored in
battery-backed random-access memory.
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