Bevat 4x4 Register File, 3 state

Data 1     1-+-V-+-16 Vcc
Data 2     2-|   |-15 Data 0
Data 3     3-|   |-14 Write Sel A
Read Sel B 4-|   |-13 Write Sel B
Read Sel A 5-|   |-12 /Write enable
Output Q3  6-|   |-11 /Read enable
Output Q2  7-|   |-10 Output Q0
GND        8-+---+-9  Output Q1