Question

State the function of the following register in the 8085 microprocessor:

Accumulator

Answer 1

The accumulator is the primary 8-bit register in the 8085 microprocessor, essential for executing arithmetic and logical tasks such as addition, subtraction, AND, and XOR. During these operations, it holds one of the required operands, functioning as both the source and the destination. Once the calculation is complete, the final output is saved back into the accumulator. Additionally, it plays a key role in handling input/output (I/O) data transfers.