A new iteration of the boards has moved the header mapping pins.  They have been rotated and moved to the rear edge of the boards to allow for a right angle pin header to be installed.

Bu doing this, it's much easier to mount the board in adjacent slots.  With the previous configuration, after installing the header and jumper wires, the board would not fit in adjacent slots in the backplane.

The Memory Board is now at version 1.4, with the keyboard at 1.5.

I have also done something similar for the GAME board, but at this stage those mapping pins are not used.