Arithmetic instructions All arithmetic instructions operated between accumulators. For operations requiring two operands, one was taken from the source accumulator, and one from the destination accumulator, and the result was deposited in the destination accumulator. For single-operand operations, the operand was taken from the source register and the result replaced the destination register. For all single-operand opcodes, it was permissible for the source and destination accumulators to be the same, and the operation functioned as expected.
Arithmetic instructions All arithmetic instructions operated between accumulators. For operations requiri,ng two operands, one was taken from the source accumulator and one from the destination accumulator, and the result was deposited in the destination accumulator. For single-operand operations, the operand was taken from the source register and the result replaced the destination register. For all single-operand opcodes, it was permissible for the source and destination accumulators to be the same, and the operation functioned as expected.