This textfile explains how to adapt an IBM Industrial keyboard to a normal AT type computer. (5-pin plug / 1/2" diameter) NOTE: The numbers corresponding to the pins in the following diagrams are strictly for the reference purposes of this textfile only. DO NOT attempt to use these numbers for any other application. on all diagrams: o = hole/socket * = pin/plug V = key/notch ---------------------------------------------------------------------- Looking into the keyboard socket on the back of the computer, the hole pattern of a normal AT type keyboard socket should look very similar to the following diagram: V 1 ----- o o ----- 5 2 ----- o o ----- 4 3 ----- o ---------------------------------------------------------------------- Looking into the plug coming from the AT type keyboard, the pin pattern of a normal AT type keyboard plug should look very similar to the following diagram: V 5 ----- * * ----- 1 4 ----- * * ----- 2 * ----- 3 Looking into the plug coming from the Industrial keyboard, the pin pattern of the Industrial keyboard plug should look very similar to the following diagram: V 6 ----- * * ----- 2 * ----- 1 5 ----- * * ----- 3 4 ----- * ----------------------------------------------------------------------- Using the diagrams above as a reference, make the following connections from the Industrial keyboard plug to the AT type keyboard plug: Industrial AT type keyboard plug keyboard plug ------------- ------------- 1 ------------ to ------------ 2 2 not used 3 ------------ to ------------ 4 4 ------------ to ------------ 3 5 not used 6 ------------ to ------------ 1 5 not used