User`s manual

General Information
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Break
A break is generated by pressing and releasing the BREAK key on
the current-console keyboard. Break does not generate an interrupt.
The only time break is recognized is when characters are sent or
received by the console port. Break removes any breakpoints in the
user code and keeps the breakpoint table intact. Break also takes a
snapshot of the machine state if the function was entered using
SYSCALL. This machine state is then accessible to you for
diagnostic purposes.
Many times it may be desirable to terminate a debugger command
prior to its completion; for example, the display of a large block of
memory. Break allows you to terminate the command.
Board Failure
The following conditions result in a board failure. These conditions
also give a WARNING message, if possible:
❏ Board initialization error/failure
❏ Debugger object checksum error
❏ Configuration data (NVRAM ENV parameters) failure (i.e.,
checksum)
❏ Configuration data (NVRAM CNFG parameters) failure (i.e.,
checksum)
❏ Calculated MPU clock speed does not match the associative
CNFG parameter
❏ Calculated BUS clock speed does not match the associative
CNFG parameter
❏ Selftest error/failure
If the board is equipped with a board fail LED, the LED will be
illuminated when a board failure occurs.