Division (500 ms) and more-advanced floating-point functions were implemented in software. Advanced built-in mathematical functions included square root, logarithm, and antilogarithm (on both decimal and natural bases), plus trigonometric functions (in degrees or in radians). A total of 27 machine opcode instructions were defined. Addressing the 1,023 word memory was allocated 10 bits. An optional 2,048 word drum could be installed, and addressed via two extra address bits. The system was in many ways presented as an advanced programmable calculator, in keeping with the heritage of its manufacturer. Simple subroutine calls and returns were supported, as was autoincrement of operands.
