AT&T DMD5620 Core

Core logic for an AT&T / Teletype DMD 5620 terminal emulator

Description

The AT&T / Teletype DMD 5620 terminal was a portrait display, programmable, windowing terminal produced in the early 1980s. It came out of research pioneered by Rob Pike and Bart Locanthi Jr., of AT&T Bell Labs.

This project implements the core logic needed to emulate a DMD 5620 terminal, including:

• ROM
• RAM
• WE32100 CPU
• I/O

Note that there is no user interface: This is a back-end library only. It may be used as a component to build a fully-fledged emulator, however.

Changelog

0.3.1: Added exception handling for memory errors, and a run function to free-run the CPU for a given number of steps.

0.3.0: Breaking change. Charater RX from RS-232 and keyboard are now handled by internal queues, and no longer return DuartError on failure.

0.2.1: Initial release.

Emulator Reference Implementation

For a reference implementation emulator that uses this library, please see the "DMD" project on GitHub.