Tornado

2
Setup and Startup
2.5.4 The NetROM ROM-Emulator Connection
The agent can be configured to communicate with the target server using the target
board’s ROM socket. Tornado supports this configuration for NetROM, a ROM
emulator produced by Applied Microsystems Corporation. Contact your nearest
Wind River Systems office (listed on the back cover) for information about support
for other ROM emulators. Figure 2-5 illustrates this connection method.
2
Figure 2-5
Connecting a Target through NetROM
HOST
TARGET
NetROM
Ethernet
The NetROM acts as a liaison between the host and target. It communicates with
the host over Ethernet, and with the target through ROM emulation pods that are
plugged into the target board’s ROM sockets. The NetROM allows you to
download new ROM images to the target quickly. In addition, a 2 KB segment of
the NetROM’s emulation pod is dual-port RAM, which can be used as a
communication path. The target agent uses the NetROM’s read-only protocol to
transfer data up to the host. It works correctly even on boards that do not support
write access to the ROM banks.
This communication path has many benefits: it provides a connection which does
not intrude on any of your board’s I/O ports, it supports both task-mode and
system-mode debugging, it is faster than a serial-line connection, and it provides
an effective way to download new VxWorks images to the target.
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