 In order to create these at minimal R&D, engineering and production costs, Novell simply implemented, almost verbatim, a prototype design created by National Semiconductor using the 8390 Ethernet chip.National Semiconductor, for its part, had no qualms about the use of the design; the use of National Semiconductor chips made the proposal almost pure profit.However, since the design had been intended only as a proof-of-concept prototype, it implemented bare-minimum functionality