Model F1B and Model F4 PDP-10 Compatible Systems

This document provides an overview of the Foonly Inc. Model F1B and Model F4 systems, which are compatible with Digital Equipment Corporation's PDP-10 architecture, specifically supporting TOPS-20 and TOPS-10 operating systems and the KL10 instruction set.

Key sections include: * Phylogeny: A historical context of PDP-10 related systems from DEC, Stanford, Xerox, and Foonly. * System Characteristics: Comparison of physical size, power consumption, and design features like cache memory and I/O bandwidth. * Performance: Benchmarking data showing the F1B as significantly faster than the KL10, and the F4 as a smaller, cost-effective alternative. * I/O Capabilities: Details on supported FBUS controllers for disks, tapes, networking (Ethernet, ARPANET), and specialized displays. * Maintenance: Description of the "Instant Expert Service" program, which leverages a 68000-based Console Computer (or 6502 on the F4) for remote diagnosis, logic analysis, and hardware debugging. * Instruction Timings: Detailed tables comparing instruction execution speeds between the KL, F4, and F1B.