LSI11 PDP-11/03

This document is the "LSI-11 PDP-11/03 Processor Handbook" published by Digital Equipment Corporation (DEC) in 1975.

It serves as a comprehensive guide to the LSI-11 (PDP-11/03), which is described as the smallest member of the PDP-11 family, offering minicomputer performance in a compact microcomputer package.

The handbook covers:

• Introduction to the LSI-11 Concept: Highlighting its architectural compatibility with larger PDP-11 systems, extensive instruction set (over 400 instructions, including optional fixed and floating-point arithmetic), modular design, various memory options, efficient word and byte processing, and advanced features like stack processing, Direct Memory Access (DMA), priority-structured I/O, vectored interrupts, and power-fail/auto restart.
• System Architecture and Specifications: Detailing the KD11-F microcomputer, its four N-channel MOS chips (control, data, two microcoded ROMs), the LSI-11 bus structure (16 data/address lines, control, interrupt/DMA lines), and the physical and electrical specifications of the PDP-11/03 system and its modules.
• Addressing Modes: Explaining how the LSI-11 accesses and manipulates data using various direct and indirect addressing modes, including the use of general-purpose registers, stack pointer (R6), and program counter (R7) for efficient data and program access.
• Instruction Set: Providing a detailed list and format of single-operand, double-operand, program control, and miscellaneous instructions, along with their operations, condition codes, and descriptions.
• Programming Techniques: Covering stack manipulation, subroutine linkage (including nesting and argument transmission), interrupts (general principles, nesting, trap subroutines), and programming peripherals through a unified addressing structure.
• Extended Arithmetic Option (EIS/FIS): Describing optional instructions for fixed-point and floating-point arithmetic.
• Console Operation: Explaining how to interface with a console terminal and use the On-line Debugging Technique (ODT) microcode for system control, memory examination, and program execution.

Overall, the document provides detailed technical information necessary for understanding, programming, and operating the LSI-11 PDP-11/03 processor.