Firmware RAM usage without overlays

A computing device comprising:

• a volatile random access memory (RAM);
• a non-volatile boot read-only memory (ROM) comprising ROM boot loader code;
• a non-volatile flash memory storing program code comprising:
• initialization code designed to be executed a single time during device booting;
• main program code separate from the initialization code and designed to be executed after execution of the initialization code;
• and
• main code loader code designed to cause the main program code to be loaded from the flash memory to the RAM;
• and
• a controller configured to:
• read the ROM boot loader code from the boot ROM and execute the ROM boot loader code;
• in response to said executing the ROM boot loader code, load the initialization code and the main code loader code to first and second adjacent portions of the RAM, respectively, as part of a single load operation;
• execute the initialization code;
• execute the main code loader code;
• in response to said executing the main code loader code, load the main program code, separately from the initialization code, to a third portion of the RAM at least partially overlapping the first portion but not overlapping the second portion, thereby at least partially overwriting the initialization code;
• and
• execute the main program code.