LSI-11 PDP-11/03

This user manual for the LSI-11 and PDP-11/03 microcomputer systems (EK-LSI11-TM-002, 1st Edition September 1975) provides comprehensive technical data for users to effectively interface with and utilize these systems.

The document is organized into several key areas:

1. System Overview: It introduces the modular concept of the LSI-11/PDP-11/03 systems, built around the KD11-F/J microcomputer. It details core features such as addressing capabilities (32K/64K), a hardware memory stack, Direct Memory Access (DMA), and vectored interrupts with position-dependent priority. Various memory options (core, static, dynamic RAM, PROM/ROM) and peripheral interface options (serial and parallel line units) are presented, along with the H9270 backplane and H780 power supply.

2. The LSI-11 Bus: A significant portion is dedicated to the LSI-11 bus, explaining its 17 control lines and 16 multiplexed data/address lines. It thoroughly describes different I/O transfer types (programmed, DMA, interrupt-driven), including detailed bus cycles (DATI, DATO, DATIO) and their associated timing diagrams. It also covers bus initialization, power-up/down sequences, Halt mode operations, and memory refresh for dynamic RAM.

3. Module Descriptions: The manual provides in-depth functional descriptions of individual LSI-11 modules. This includes the internal architecture and operation of the KD11-F microcomputer (microprocessor chip set, clock, bus interface, interrupt/reset logic, bus arbitration), as well as detailed explanations of memory modules (MMV11-A core, MRV11-A PROM/ROM, MSV11-A/B semiconductor memory) and interface modules (DLV11 serial line unit, DRV11 parallel line unit).

4. Configuration and Operation: Practical guidance is given on configuring the KD11-F/J processors and other modules using jumper settings for various features (e.g., memory refresh, power-up modes). It provides instructions for physically installing the system components, including backplane mounting, power connections, and environmental requirements. Procedures for initial system power-on, console printout for testing, and loading programs via paper tape or booting the RT-11 operating system are also detailed.

5. User-Designed Interfaces: For advanced users, the document offers guidelines and sample circuits for creating custom interface modules, ensuring compatibility with LSI-11 bus specifications for various I/O operations.

6. Peripherals and Reference: It lists compatible peripheral devices, primarily serial line devices, along with their interface requirements. The manual concludes with appendices providing quick reference information such as the memory map, LSI-11 bus pin assignments, ASCII code, and a summary of LSI-11 instructions.

In essence, this manual serves as a comprehensive technical guide for understanding, configuring, installing, and operating the LSI-11 and PDP-11/03 microcomputer hardware and its various modules, with a strong emphasis on the detailed functionality of the LSI-11 bus for system integration and interfacing.