8-Point Quadratic Smooth With FPP-12

This document describes the FPSMOOTH program, designed for the FPP/PDP-12 system. The program provides an 8-point quadratic smoothing technique for an array of up to 4095 data points stored as 12-bit words.

Key features and details include:

• Performance: By performing calculations in parallel with the PDP-12 CPU and utilizing the FPP-12, the system significantly improves processing speed compared to software-only floating-point packages.
• Versatility: The operator can choose to force-fit the middle 2, 4, or 6 data points of the 8-point array, providing flexibility in the level of smoothing applied to the data.
• Efficiency: The program uses single-word addressing to reduce core memory requirements by half compared to double-word addressing.
• Usage: The program consists of two sections: CONTAPE (a display routine for loading data) and FIT8DECS (the smoothing routine). Users interact with the program via a teletype interface and sense switches, with operations guided by displays on the scope.
• Implementation: The document includes a flow diagram, usage instructions, technical notes on modifying the force-fit parameters, and a index of the associated files on LINCtape.