Add Instruction

Adds 2 values together and stores in a destination register.

Can also Add a register and a constant number if desired.

Subtraction can be done by adding a number and a negative number

Can also copy values by adding a number + 0 and giving it a different destination register

0001 DDD SR1 F 00 SR2

0001: Indicates we want to use the ADD Opcode
D: Destination Register, we want to output the sum to this register(3 bit length, R0-R7, 000 to 111, 0 to 8)
SR1: 1st register number's value we want to add
SR2: 2nd register number's value we want to add
F: Flag
- Flag == 0, means we are adding 2 registers together
- Flag == 1, means are in Immediate mode and are adding a register and a constant number.
00: Unused bits for Add (Register)

Example of Adding R3 + 35 and storing it in R1

0001 001 011 0 00 101

0001 DDD SR1 F CCCCC

0001: Indicates we want to use the ADD Opcode
D: Destination Register, we want to output the sum to this register(3 bit length, R0-R7, 000 to 111, 0 to 8)
SR1: 1st register number's value we want to add
F: Flag
- Flag == 0, means we are adding 2 registers together(Add Register)
- Flag == 1, means are in Immediate mode and are adding a register and a constant number.(Add Immediate)
C: Constant number of 5 bits to add to SR1
00: Unused bits for Add (Register)

Example of Adding R3 + Constant Number 6 and storing it in R3

0001 011 011 1 00110

ADD