2-5
The user can call any of the commands supported by the firmware. A standard input routine controls the
system while the user types a line of input. Command processing begins only after the line has been
entered and followed by a carriage-return.
NOTES
1. The user memory is located at addresses $00010000-$xxxxxxxx, $xxxxxxxx is
the maximum RAM address of the memory installed in the board. When first
learning the system, the user should limit his/her activities to this area of the
memory map. Address range $00000000-$0000FFFF is used by dBUG.
2. If a command causes the system to access an unused address (i.e., no memory
or peripheral devices are mapped at that address), a bus trap error will occur.
This results in the terminal printing out a trap error message and the contents of
all the MCF5206 core registers. Control is returned to the dBUG monitor.
2.3 TERMINAL CONTROL CHARACTERS
The command line editor remembers the last five commands, in a history buffer, which were issued.
They can be recalled and then executed using control keys.
Several keys are used as a command line edit and control functions. It is best to be familiar with these
functions before exercising the system. These functions include:
a. RETURN (carriage- return) - will enter the command line and causes processing to begin.
b. Delete (Backspace) key or CTRL-H - will delete the last character entered on the terminal.
c. CTRL-D - Go down in the command history buffer, you may modify then press enter key.
d. CTRL-U - Go up in the command history buffer, you may modify then press enter key.
e. CTRL-R - Recall and execute the last command entered, does not need the enter key to be
pressed.
For characters requiring the control key (CTRL) , the CTRL should be pushed and held down and then
the other key (H) should be pressed.
2.4 dBUG COMMAND SET
Table 2-1 lists the dBUG commands. Each of the individual commands is described in the following
pages.
