UStudy aims to provide Educational Content for Polytechnic College students based on the latest K Scheme syllabus of Tamil Nadu.
Three address instructions computer needs three register address fields. The register address field may be a processor register or a memory operand. Cyber 170 computer needs three address instructions .
ADD R1, R2, R3
The above instruction denotes the operations,
R1 <-- R2 + R3 (arithmetic addition)
R2, R3 = Source registers
R1 = Destination register
ADD R1, A, B
R1M[A] + M[B]
As shown, it is clear that in the instruction 3 addresses are specified. In the above instruction one register address and two memory addresses are specified. Example of computer using this type of instructions Cyber 170.