CONTROL WORD DECODING

摘要

A first field of a control word is decoded into 2 decodes for testing or specifying a first set of CPU conditions, a second field in the control word is decoded into 2 - X decodes for testing or specifying a second set of CPU conditions, and the X decodes which together with the 2 decodes of the first field test or specify multiples or pairs of a third set of CPU conditions and inhibit the 2 decodes from testing or specifying said first set of CPU conditions. This extended control word decoding device increases the number of simultaneous functions performed during execution of a control word in the central processing unit (CPU) of a computer system.