MPS M734x EngDrwg

This document set, originating from Digital Equipment Corporation (DEC) in 1974, comprises a series of hardware module designs. Each module is detailed with schematics, parts lists, and board layouts, illustrating various functionalities for a computer system.

The key modules described include:

1. Programmable Module (M7341): A versatile data handling module, primarily for serial communication (UART, transmit/receive), featuring configurable jumpers, interrupt management, and clock generation.
2. P.M. Monitor/Control Module (M7342): A companion module providing memory operation control (read/write, enable), reset and interrupt management, event counting, switch register interfacing, and "evoke" (trigger) logic.
3. Read/Write Memory Modules (M7344 series - 1Kx8, 2Kx8, 4Kx8): Static RAM modules of increasing capacities (1KB, 2KB, 4KB), each with address/data buffering, decoding, and control logic for integration into larger memory systems.
4. 4Kx8 PROM Module (M7345): A Programmable Read-Only Memory module, designed to be expandable and depopulatable, providing flexible configuration of 4KB of PROM with its own address decoding and control.
5. Power Fail Detect & Vectorer Event Module (M7346): A critical system monitoring component responsible for detecting AC/DC power failures, generating precise timing signals, and providing auto-start/stop control and event vectoring.
6. PCS 16 Evoke Decoder Module (M7328): A decoder module that interprets specific address or control signals to generate up to 16 distinct "evoke" (trigger/activate) signals for system control and sequencing.

In essence, these documents collectively detail a suite of interconnected, configurable, and essential digital logic and memory modules, forming the building blocks of a mid-1970s computer system.