PDP-11/6X - FP11-F Floating Point Unit Add/Sub/Mul/Div Random Operand Exerciser

This document describes the random operand exerciser for the PDP-11/6X floating point unit (FPU). The diagnostic program uses random operand patterns to test the FPU's add, subtract, multiply, and divide instructions. It performs tests under various conditions, including single/double precision, round/truncate modes, and enabled/disabled overflow and underflow interrupts. The program compares hardware results against software routine outputs to verify accuracy. It is compatible with systems running the XXDP monitor and includes various error handling, reporting, and loop control features for diagnostic flexibility. The document outlines requirements, loading, starting procedures, and detailed test descriptions.