There are three similar versions of the board. This one connects via the 26 pin port connector, there is another version that uses a 34 pin connector, and the third version plugs directly into the SBC-85 backplane.

At this time, this board is only available in TIN

The SBC-85 backplane prototyping board has been a hit and evidently there is a lot of home-brew prototyping going on which is great! A useful complement to the backplane mounted prototyping board is an expansion port mounted prototyping board.

Just like the original backplane prototype board, this has plenty of pad-per-hole prototyping area with well marked (and differently shape pads for) power and ground rails. There a couple of major differences from the backplane prototyping board. The first is that this board has a 26-pin header to connect to either the SBC 8155 I/O port or to the new Serial-Parallel I/O card. The second addition is that this board has buffered LED displays of all 24 port signals (22 with the 8155).

In the image above, the two 26 pin headers are connected in parallel but the signal is tapped in-between by the buffers used to drive the LED displays to show the I/O signal levels. While the bottom header connects to the I/O port, the top header is a take-off point for wire wrapping or point-to-point into the pad-per-hole prototype area.

While the pin-out matches the SBC-85 family, this is a fairly generic board that would be useful for many other prototyping projects.