PC/104 Signal ISA SignalA1 A1 A2 A2 . . . . A31 A31 A32 N/C ___________________________________________________ B1 B1 B2 B2 . . . . B31 B31 B32 N/C __________________________________________________ C0 N/C C1 C1 . . . . C18 C18 C19 N/C __________________________________________________ D0 N/C D1 D1 . . . . D18 D18 D19 N/C