User manual

Monitor12 (MON12) User Manual 05/30/01
9
EVALUATION MODE
The second mode of operation allows the user to evaluate (emulate) user code in
a target system environment utilizing the memory of the MC68HC912 MCU. This is
accomplished by relocating the code from RAM memory locations (EVB user RAM) to
MCU programmable memory locations (Typically $8000 - $FFFF, see MCU user
manual). The MCU internal ram and EEprom are also available to the user in this
mode. The EVB then operates the user application in the single chip mode of
operation or in expanded mode from the EVB boards program memory area.
MONITOR PROGRAM
The monitor program is the resident firmware for the EVB, which provides a self
contained operating environment. The monitor interacts with the user through
predefined commands that are entered from a terminal. The user can use any of
the commands supported by the monitor.
A standard input routine controls the EVB operation while the user types a
command line. Command processing will begin only after the command line has
been terminated by depressing the keyboard carriage return (Return or Enter)
key.
COMMAND LINE FORMAT
The command line format is as follows:
>[command] [<parameters>](<ENTER)
where:
> EVB monitor prompt or cursor.
command Command mnemonic(single letter for most commands).
<parameters> Expression or address, maybe optional.
(<ENTER) ENTER or RETURN keyboard key - depressed to enter
command.
NOTES:
(1) The command line format is defined using special characters which have the
following syntactical meanings:
[ ] Enclose optional fields, note that last command will be repeated if
a new command is not entered.
< > Enclose syntactical variable
[ ]... Enclose optional fields repeated
These characters are not entered by the user, but are for definition purposes
only.
(2) Fields are separated by any number space, comma, or tab characters.
(3) All input numbers are interpreted as hexadecimal.