AND subcell
If both inputs are TRUE, output is TRUE; otherwise, FALSE.
OR subcell
If either or both inputs are TRUE, output is TRUE; otherwise, FALSE.
NOT subcell
If input is TRUE, output is FALSE, and vice versa.
XOR subcell
If both inputs are either TRUE or FALSE, the output is FALSE; otherwise, TRUE.
8-Bit MUX
Select lines (seen on left before inverters) configure the MUX to pass either an 8-bit input from one or the other side, and output to a specific side according the the location of the MUX in the chip.