Emulation of Large Systems The conversion problem and a new technique called emulation are discussed. The technique of emulation is developed and includes sections on both the Central Processing Unit (CPU) and the Input/Output unit (I/O). This general treatment is followed by three sections that describe in greater detail the implementation of compatibility features using the emulation techniques for the IBM 7074, 7080 and 7090 systems on IBM System/360. CACM December, 1965 Tucker, S. G. CA651205 JB March 6, 1978 4:09 PM 1164 5 1164 1164 5 1164 1164 5 1164