Bootstrap Loader

Summary

This document provides the technical schematics and circuit diagrams for a "Bootstrap Loader" module (model M847). The documentation is comprised of three parts:

• Page 1: Displays the board layout, including the positioning of integrated circuits (ICs), resistors, and diode matrices. It includes notes on configuration via jumpers for setting the initial loading address, program starting address, and instruction field. It also provides a comprehensive parts list detailing the specific IC types (e.g., 74123, 7404, 7400) and other components used on the board.
• Page 2: Details the functional logic schematic of the bootstrap loader, illustrating how the timing and control signals are processed. This page outlines the logic gates and control flow required to load data into the system, including the "Power OK" and "Load Pulse" sequences.
• Page 3: Displays the large-scale diode matrix array used for data storage. It shows how the system uses 74164 shift registers to control rows of diodes, allowing the module to output specific data bits based on the matrix configuration.

Overall, the document serves as the manufacturing and maintenance guide for a hardware-based bootloader designed to initialize a computer system by loading instructions directly into memory.