Past exam of the year 1 of the computer science course of the University of Oxford / 2017 / Digital systems, linear algebra, introduction to formal proof / 3 / b / i

Keep storage only for registers 1 through 31, return a hardwired all-zero word on either read port when its address is zero, and setThere is no enable for register zero and no global RegWrite input to this register file. The right-hand diagram above shows this change. Every clock edge may select a write address; choosing zero suppresses all physical register enables. Consequently the MIPS zero register acts as a write-suppression destination.