Cursor Control

This document is a comprehensive collection of engineering drawings detailing various electronic modules, likely components of a Digital Equipment Corporation (DEC) VT05 terminal system. It comprises circuit board layouts, logical schematics, and timing diagrams for several distinct sub-systems. The modules covered include:

1. Cursor Control: Outlines the circuitry for cursor positioning and management.
2. Character Generator A and Timing: Details the design for generating display characters and managing display synchronization (H-sync, V-sync).
3. Memory and Memory Timing: Presents the memory circuits and their operational timing.
4. Interface (VT05): Shows the general interface connections for the terminal, handling keyboard data, EIA data, and video signals.
5. VT05 High Speed Interface: A more extensive section covering high-speed data transfer, including UART components, data handling logic, and detailed timing diagrams for various signals like data ready, buffer clocks, and video synchronization.
6. Static Y-Counter (M-7000): Focuses on the design and timing of a dedicated Y-axis counter, including its logic for up/down counting and cursor advance.

The drawings consistently utilize DEC 7400 series integrated circuits and provide specific details on component placement, logical gate interconnections, parts lists, signal definitions (such as X/Y cursor controls, memory data paths, clock signals, and video signals), and critical timing specifications.