The board was a very basic and simple
design with plenty of left over real estate. A schematic for this board can be
obtained
here. The
only item of note is that a signal was put out on the S-100 bus line 69
indicating the status of the "write protect line " (pin 70). These signals
were dropped by later board manufactures and never incorporated in the IEEE-696
standard. The boards were quickly replaced in S-100 systems for more dense
RAM boards and are now essentially collector items.