The 6-DE-65/3104R boards provide for a PCI board mounted parallel to the other boards in the stack, and for two PC/104 (non plus) stacks. The PC/104 stacks are offset from the PC/104 bottom stack by 1” which allows the PCI board to lay flat and avoid conflict with the PC/104 stacks. The PC/104 connectors are elevated from the board by 0.400”.