Motorola M68EVB912B32, User Manual

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OPERATION
68EVB912B32UM/D 3-36
MM Memory Modify MM
syntax:
MM <Address> [<Data>]
where:
<Address> is a16-bit hexadecimal number.
<Data> is an optional 8-bit hexadecimal number.
The Memory Modify command allows the contents of memory to be examined and/or modified
as 8-bit hexadecimal data. If the 8-bit data parameter is present on the command line, the byte at
memory location <Address> is replaced with <Data> and the command is terminated. If not,
D-Bug12 enters the interactive memory modify mode. In the interactive mode, each byte is
displayed on a separate line following the data’s address. Once the memory modify command
has been entered, single-character sub-commands are used for the modification and verification
of memory contents. These sub-commands have the following format:
[<Data>] <CR> Optionally update current location and display the next location.
[<Data>] </> or <=> Optionally update current location and redisplay the current
location.
[<Data>] <^> or <-> Optionally update current location and display the previous
location.
[<Data>] <.> Optionally update current location and exit Memory Modify.
With the exception of the carriage return, the sub-command must be separated from any entered
data with at least one space character. If an invalid sub-command character is entered, an
appropriate error message is issued and the contents of the current memory location are
redisplayed.
restrictions:
While there are no restrictions on the use of the MM command, caution should be used when
modifying target memory while user code is running. Accidentally modifying target memory
containing program code could lead to program runaway.