Question: What type of machine, such as the Heathkit H8 which was originally sold in 1977, is required by the products created by Exidy from 1974 until 1986?
Sentence (from "Heathkit H8"): The machine also included a bootstrap ROM that made it easier to start up, including code for running basic input/output and allowing input through a front-mounted octal keypad and front panel display instead of the binary switches and lights used on machines like the Altair 8800.
Relevant evidence: No