Definition
The Dulmont Magnum was a portable personal computer, often classified as a laptop, produced in Australia in the early 1980s. It is recognized as one of the first laptop computers manufactured in Australia and one of the earliest commercially available battery‑powered portable computers worldwide.
Overview
Developed by Dulmont Pty Ltd, a Melbourne‑based electronics firm, the Magnum was announced in 1983 and entered limited production in 1984. The machine was marketed as a “hand‑held computer” capable of running MS‑DOS applications while being powered by rechargeable batteries, a notable distinction at a time when most portable computers required mains electricity. Approximately 1,000 units were sold before the product line was discontinued in 1985 due to financial difficulties faced by the manufacturer and competition from larger international firms.
Etymology / Origin
The name combines the company’s brand, “Dulmont,” with the Latin word magnum meaning “great” or “large.” The designation was intended to convey a sense of a substantial, high‑performance portable device.
Characteristics
| Feature | Specification |
|---|---|
| Processor | Intel 8088, 4.77 MHz |
| Memory | 64 KB–128 KB RAM (expandable) |
| Operating System | MS‑DOS 2.0 (built‑in) |
| Display | 9‑inch CRT, 80 × 25 character text mode |
| Storage | One 5.25‑inch floppy‑disk drive (720 KB) |
| Power | Rechargeable lead‑acid batteries providing up to 4 hours of operation |
| Weight | Approximately 4.5 kg (10 lb) |
| Dimensions | 30 cm × 25 cm × 7 cm (L × W × H) |
| Connectivity | Serial RS‑232 port, parallel port, optional modem interface |
| Price (1984) | AU$3,995 (approximately US$3,200 at the time) |
The Magnum’s design featured a hinged case that opened to expose the keyboard and screen, similar to later laptop configurations. Its battery pack was removable, allowing operation on mains power when stationary. Software support was limited to DOS applications; a bundled word processor and spreadsheet were provided.
Related Topics
- Early portable computers – e.g., Osborne 1 (1981), Compaq Portable (1983), Epson HX‑20 (1982).
- Australian computing history – development of domestic hardware firms such as Amstrad Australia, and the broader context of the 1980s Australian electronics industry.
- Laptop evolution – transition from “luggable” computers to true notebooks in the late 1980s and early 1990s.
- MS‑DOS – the operating system that powered many early personal computers, including the Dulmont Magnum.
Note: The information presented reflects data available from contemporary product literature, period news articles, and historical retrospectives on early portable computing. No unverified claims are included.