Arithmetic Instructions
Add(10 usec.)
add x Y Operation Code 40
The new C(AC) are the sum of C(Z) and the original C(AC). The C(Z) are unchanged. The addition is performed with 1's complement arithmetic.
If the sum exceeds the capacity of the Accumulator Register, the overflow flip-flop will be set (see [Skip Group instructions]).
Subtract(10 usec.)
sub x Y Operation Code 42
The new C(AC) are the original C(AC) minus the C(Z). The C(Z) are unchanged. The subtraction is performed using 1's complement arithmetic.
If the difference exceeds the capacity of the Accumulator, the overflow flip-flop will be set (see [Skip Group instructions]).
Multiply(approximately 25 usec.)
mul x Y Operation Code 54
The C(AC) are multiplied by the C(Z). The most significant digits of the product are left in the Accumulator and the least significant digits in the In-Out Register. The previous C(AC) are lost.
Divide(approximately 90 usec.)
div x Y Operation Code 56