PDP-8 Floating-Point System

This manual, originally published by Digital Equipment Corporation in 1965, provides comprehensive documentation for the PDP-8 Floating-Point System. It outlines how the system uses a floating-point accumulator to handle floating-point arithmetic without requiring the user to develop custom subroutines. The guide details the floating-point number representation (mantissa and exponent), the basic commands (FADD, FSUB, FMPY, FDIV, FGET, FPUT, FNOR, FEXT), and includes input/output routines, standard subroutines for mathematical functions (square, square root, sine, cosine, arctangent, logarithm, and exponent), and various package versions (8-5A-S through 8-5D-S). It also provides detailed program listings for the arithmetic interpreter and input/output routines.