The KIMSI S-100 expansion backplane for the KIM-1 by Forethought Technologies
Here are some pictures of the KIMSI S-100 add-on board for the KIM-1. This board was produced by Forethought Technologies along with an option power supply that would handle the extra load of up to 8 S-100 cards. Shown is how the KIMSI board is attached to the KIM-1. At present, the board only has one S-100 card slot connector.