memcmp [-bwlsd] ADDR1 ADDR2 COUNT
Compare memory regions specified with ADDR and ADDR2 of size COUNT bytes. If source is a file COUNT can be left unspecified, in which case the whole file is compared.
| -b | byte access |
| -w | word access (16 bit) |
| -l | long access (32 bit) |
| -s FILE | source file (default /dev/mem) |
| -d FILE | destination file (default /dev/mem) |