The BX2-DE-63/104 boards allow a single ISA board to be used on the top of a PC/104 stack with the ISA board parallel to the individual PC/104 boards.
There are three other variations of this board - the only difference between them being the relative location between the PC/104 connector and the ISA connector.
See the following items for all variations of this board:
W-26: BX-DE-63/104RA (PC/104 to the left)
W-27: BX-DE-63/104RB (PC/104 to the right)
W-31: BX2-DE-63/104 (PC/104 at the end)
W-78: BX-DE-63/104RC (PC/104 at the center
