Just came across this mention of an in-circuit emulator, by the small team planning to make 'speed-up' kits for the arcade game Missile Command (to improve revenues for the arcade operators):
Quote:
Armed with a GenRad 6502 microprocessor emulator (which they bought for $25,000 thanks to a parent's loan) and a TRS-80, Golson and his team stayed up all hours copying disassembled code from Missile Command by scratch. "You had to sit next to the TRS-80 and type it up live," Golson remembered.
Unlike other speed-up kit creators, GCC went to great lengths to ensure that its kits couldn't be copied—even scratching PAL markings off of its chips—and soon launched its Super Missile Attack kit. That pricey GenRad investment was quickly paid off and then some, thanks to over a thousand units selling within a matter of weeks for $250 a pop. However, with success came the watchful gaze of Atari.
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http://arstechnica.com/gaming/2016/03/p ... inal-devs/A little more on the emulator
here:
More on the speedup kit
here:
Previous thread on ICEs