Pointer Read Unit. The index j of the entry at the head of the activation queue is used to look up the start and end pointers pj and pj+1 for the v and x arrays for column j. To allow both pointers to be read in one cycle using singleported SRAM arrays, we store pointers in two SRAM banks and use the LSB of the address to select between banks. pj and pj+1 will always be in different banks. EIE pointers are 16-bits in length