The instruction is an implicit addressing mode command used to rotate the bits of the Accumulator one position to the right through the Carry flag .
Technical papers and assembly guides often use RAR for the following tasks: rotate.rar
: Implementing division by 2 (shifting right). The instruction is an implicit addressing mode command
If you are studying a paper or code from a "rotate.rar" archive, you will likely see these related commands: Instruction Description Rotate Left Rotates Accumulator left; Bit 7 goes to Carry and Bit 0. RRC Rotate Right Rotates Accumulator right; Bit 0 goes to Carry and Bit 7. RAL Rotate Left through Carry →right arrow Carry; Carry →right arrow MOV A, M Move Memory Loads data from memory into the Accumulator for processing. JC / JNC Jump on Carry Used after RAR to branch based on the bit shifted out. Resources for Further Study RRC Rotate Right Rotates Accumulator right; Bit 0