A NuBus-based card produced in 1991 that facilitated the running of a Newton development environment on a Mac OS desktop computer connected to an external circuit board that replicated the physical Newton hardware. Apple apparently planned to produce these cards in volume for developers, but they proved to be too expensive. It is believed that only 50 or so cards were ever made. Shortly after the cards were introduced, prototype MessagePad devices appeared which could be used for development. Debugger software such as Egger and Hammer was required in order to use these cards for development purposes.
An ARMageddon card with an attached daughterboard was known as a Fat Man.
The ARMageddon card preceded the ARMistice and ARMadillo cards. The cards were so named because of the ARM processor used in the Newton hardware.
Stories of Apple: ARMageddon and ARMistice
Flickr: Apple Newton ARMageddon (Front)
Flickr: Apple Newton ARMageddon (Back)
Computer History Museum: ARMageddon Fat Man Board