### A good answer might be:

`0xFFFFFFA4`

Bit 7 of 0xA4 is one so `lb` extends that bit to all high order three bits of $10.

# Storing a Single Byte

Loading and storing bytes is used for processing text and for low-level systems programs (such as assemblers and operating systems). Graphics programs, also, make frequent use of these operations. Both operations could be done using `lw` and `sw` along with bit manipulation instructions, but it is convenient and fast to have byte length load and store.

There is an instruction for storing a byte:

    sb    t,off(b)   # The byte at off+b <-- low-order
                     # byte from register $t.
                     # b is a base register.
                     # off is 16-bit two's complement.

There is no need for two "store byte" instructions. Whatever is in the low-order byte of the register is copied to memory. The rest of the register is ignored. Of course, the register does not change.

### QUESTION 3:

- Memory at 0x10000519 contains the byte 0x44
- Register $8 contains 0x10000400
- Register $10 contains 0xFA034183

Write the instruction that replaces the "0x44" in memory with "0x83".

> `sb ___, ____ ( ____ )`