The shuttleboards were one of the first Zorro II busboards available for the A500. (Probably THE first). The basic board consisted of a large PCB containing Zorro II slots (Whether ISA slots were available is currently unknown) which was connected to the side expansion slot of the A500 by using a rigid ribbon cable. Also ribbon cables were needed to connect to some of the internal chips of the A500 which was then attached to the busboard. An additional power supply was needed to power the busboard as the standard A500 power supply was not sufficient. The board was highly compatible with most Zorro II cards which stood vertically up from the board. The downside was that the whole PCB was open-air and not contained in any form of case which would have provided protection. Later on Eagle also produced tower solutions to house both the A500 and its busboard. Other housing options may have been made such as a shaded plexiglass unit, which was shown at the Cologne fair.
Thanks to Ralph Ewers