Custom Memory Mapping - Freescale Semiconductor Motorola MMDS0508 Operation Manual

Operation Fundamentals
Custom Memory
Mapping
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For creating custom memory configurations, use the customize memory
map (SETMEM) command. When this command is entered, the set
memory window appears over the debug screen. Via this window, as
many as four blocks of RAM and four blocks of ROM can be defined.
(ROM is write-protected; attempting to write to ROM stops program
execution.)
The SETMEM command can be used to expand the normal RAM and
ROM ranges temporarily during debugging. Be sure to restore the
original size and configuration of the MCU memory before final
debugging. Otherwise, the code could fail to fit or run in an MCU's
memory space.
For each memory block, specify the address range and memory type. To
write the map to a file, press the F6 function key, then enter a filename
in response to the prompt. To prevent loss of system files, a custom
filename should not duplicate any files shipped with an EM module.
Press the F7 key to apply the map to memory without saving the map to
a file for future use. To cancel the command, press <ESC>.
Use the load personality file (LOADMEM) command to load a stored
custom map during future emulation sessions. Note that the LOADMEM
command can be part of the start-up script file, so that loading the
custom map becomes an automatic part of MMDS start-up (.MEM files
also can be loaded at start-up by using the –M option with the MMDS
executable.)
The LOADMEM command also can be used to restore the standard
memory mapping. Refer to the appropriate EM user's manual to
determine the default personality files used by a particular EM module.
Operation Fundamentals
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