The SMINI is a classic CMRI board designed by Dr. Bruce Chubb. It has 24 inputs and 48 outputs. It is described in version 3.1 of Dr. Chubb's CMRI users manual (which is a must-have for anyone interested in Model Railroad Signaling whether you use CMRI or not). These boards have the RS485 CMRINet interface and are current sinking (open collector). They were assembled by the Don Wood or by SLIQ Electronics, the designated builders at the time. As far as we can tell, these were never installed and the wrapper only removed for inspection.