FPP-12 Floating Point Processor

This user's manual provides comprehensive documentation for the FPP-12 Floating Point Processor, a peripheral device for PDP-8 and PDP-12 computer systems. It covers the following key areas:

• Programming Data: Detailed information on the floating-point number system, FPP12 register organization, the Active Parameter Table (APT), and the complete instruction set including data reference and special instructions.
• Programming Examples: Practical guidance on initializing programs, using index registers for address modification and loop counters, implementing push-down stacks, writing re-entrant subroutines, and debugging techniques.
• Hardware Components: An in-depth description of the FPP12 hardware, including timing diagrams for data breaks, register descriptions, and logic flow diagrams for operations like initiation, fetch, deposit, and various arithmetic tasks.
• Installation & Maintenance: Procedures for installing the FPP12 on both positive and negative bus systems, along with power requirements and necessary diagnostic programs for system checkout.