Computer Architecture / Chapter 2: Operations on Numbers / Add-immediate Instruction

Memory Cell #0

Memory cell #0 has a special property. It is always set to 0. More precisely:

value of cell 0 at time t = 0

The value of memory cell #0 is always 0 because certain programs need the number 0. For example, suppose that we want to set memory cell #2 to 5. We can do this by adding memory cell #0 and constant 5:
Instructions
Memory Cells
Program Counter Time
0 0
LW Computer Simulator

Here are some claims we can make with this property:

  • value of cell 0 at time 0 = 0
  • value of cell 0 at time 5 = 0
  • value of cell 0 at time 180 = 0
Quiz (1 point)

In the LW Computer Simulator above, what is the value of memory cell #0 at time = 1?

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