Performs a sized memory read from the target and prints the result. This command is intended to be used to perform low-level writes to regions of memory or memory-mapped I/O registers. This command does not make use of MULTI's memory cache and the read is performed immediately. See _CACHE.
size must be 1, 2, or 4. The units are bytes. addr must be aligned correctly to the nearest size bytes, and may consist of any expression that the debugger can evaluate.