Technical data

2-6 Computer Group Literature Center Web Site
Startup and Operation
2
3. Connect the terminal that is to be used as the 172Bug system
console to the default debug EIA-232-D port at serial port 1 on the
front panel of the MVME172LX. Refer to Serial Connections in
Chapter 1 for other connection options. Set the terminal up as
follows:
– Eight bits per character
– One stop bit per character
– Parity disabled (no parity)
– Baud rate 9600 baud (default baud rate of MVME172LX ports
at powerup)
After power-up, you can reconfigure the baud rate of the debug port
by using the 172Bug Port Format (PF) command.
Table 2-2. Software-Readable Jumpers
J21 Bit No. Pins Function
Bit #0 (GPI0) 1-2 When set to 1 (high), this bit instructs the debugger to use local static
RAM for its work page (i.e., variables, stack, vector tables, etc.).
Bit #1 (GPI1) 3-4 When set to 1 (high), this bit instructs the debugger to use the default
setup/operation parameters in ROM instead of the user setup/operation
parameters in Non-Volatile RAM (NVRAM). The effect is the same as
pressing the
RESET and ABORT switches simultaneously.
This feature can be helpful in the event the user setup is corrupted or
does not meet a sanity check. Refer to the ENV command description
for the Flash/ROM defaults.
Bit #2 (GPI2) 5-6 Reserved for future use.
Bit #3 (GPI3) 7-8 Reserved for future use.
Bit #4 (GPI4) 9-10 When set to 0 (low), this bit informs the debugger that it is executing
out of Flash memory. When set to 1 (high), it informs the debugger
that it is executing out of the PROM.
Bit #5 (GPI5) 11-12 Open to your application.
Bit #6 (GPI6) 13-14 Open to your application.
Bit #7 (GPI7) 15-16 Open to your application.