explanation.txt

In the first video, we test the operation of add, addi, lw, and sw.
The instructions can be found in tests/test_instrs.mem.
Initially, data memory contains 2 in memory 0, and 3 in location 4.
The data are loaded in, added, and an immediate of 4 is added.
To test the result, we first reset the processor.
Then we allow it to run until all instrutions have excetuted.
The result is stored in memory address 8.
We show the contents of all three memory containers (instruction,
data, and registers) before and after the program runs.

In the second, we test the operation of branching and jump.
Initially, the registers $t0, $t1, and $t2 are loaded with 16, 32, and 16.
Then $t0 is checked for equivalence with $t1, and if they are equal, 32 is
reported in data memory at location zero.  Otherwise, 16 is reported.
Then $t0 is checked for equivalence with $t2.  Again, if they are equal,
32 is reported in the second memory location.  If they are not equal, 16 is 
reported.  Basically, the value of the memory location indicates whether 
a branch occured.  The instructions run can be found in tests/test2_instr.mem