American Automation EZ-Pro Development System AA-547

[vin25]

The American Automation EZ-Pro Development System AA-547 was a specialized hardware platform from the early 1980s designed for embedded systems development, particularly notable for its in-circuit emulation capabilities for microcontrollers like the Motorola 68HC11. Its claim to fame was serving as an essential tool for engineers to prototype, test, and debug embedded systems, making it a significant contributor to the evolution of embedded computing technology. While not a mass-market personal computer and thus not widely popular among general consumers, it was important within engineering and technical circles.

Manufacturer: American Automation
Type: Embedded systems development platform
Announced: December 1972
Release Date: Early 1980’s
Cost at release: ~$18,000 (adjusted for inflation)
MIPS: 0.3 (300 KIPS)

Hardware Specifications

Microcontroller: In-circuit emulator and debugger for microcontrollers commonly Motorola 68HC11
Modular hardware design with multiple interface and emulation modules
Support for real-time code testing and debugging directly on target hardware
Serial and parallel I/O ports for communication with host computers and target systems
Expandable with additional peripherals for various microcontroller families

Operating System & Programming Languages

Operating System: N/A
Supported Languages:
- Assembly language, for direct hardware control and efficiency.
- C, which became the industry standard for embedded systems due to its balance of low-level access and portability.
- Occasionally, C++ was also used for more complex projects, and BASIC or other languages could be used depending on the development tools available, but C and Assembly were predominant

Notables

The American Automation EZ-Pro Development System AA-547 was a niche, professional-grade embedded systems development tool, not a general-purpose computer.
It was notable for its robust in-circuit emulation and debugging features, which allowed engineers to interact directly with microcontroller hardware during development.
The system played a key role in the transition from manual, hardware-based prototyping to more automated, software-driven embedded system design.
While it did not have widely known nicknames, it was sometimes referred to simply as the “EZ-Pro” in engineering circles.
Its main historical significance lies in its contribution to advancing embedded systems engineering and prototyping during the early 1980s.
Due to its specialized function and high cost, it was uncommon outside of professional and academic environments.

Donated by: Dr. Arlen Michaels

Vintage Computing Collection