LC-3 has three type of operations: ADD, AND, and NOT. I’ll describe them below with an accompanying Truth Table if necessary.

*Note: I’ll be accompanying this with an intro to the LC-3 Programming Environment soon…This was merely posted for those who needed help with their CS course. I’ll post the remaining guides soon…

First of all before we begin, let’s say these registers hold the following values…

R2 = 10
R3 = 15
R4 = 1;

The ADD Operation

The first ADD operation allows you to add the content of two registers and save the result in a register.

R2 denotes the Destination Register
R3, and R4 denotes the Registers whose contents will be added

Translation:
R2 = R3 + R4
R2 = 15 + 1
R2 would contain 16.

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