1. A multiprocessor computer system having at least one non-symmetrically shared item of peripheral equipment, comprising: a main computer, a secondary computer, and an intelligent switch connected to said main computer and to said secondary computer, said item of peripheral equipment being connected to said intelligent switch and switchable by said intelligent switch to said main computer or to said secondary computer, said item of peripheral equipment being initially switched to said main computer, wherein said main computer performs a predetermined first data transfer to said item of peripheral equipment, said intelligent switch comprising means for sensing said predetermined first data transfer, and said intelligent switch switches said item of peripheral equipment from said main computer to said secondary computer in response to the completion of said predetermined first data transfer.