Memory Organization
Bytes are nice, but most data items use larger "words"
For MIPS, a word is 32 bits or 4 bytes.
232 bytes with byte addresses from 0 to 232-1
230 words with byte addresses 0, 4, 8, ... 232-4
Words are aligned i.e., what are the least 2 significant bits of a word address?
Registers hold 32 bits of data