A tiny little board that allows the use of Alt-N for disk swap in a suitably equipped 1088XEL.
This works with the XEL-CF3 interface and plugs into J25 of the 1088XEL, next to the PS/2 connector.
A wire then connects from the board to pin 2 of the XEL-CF3's stats connector.
Also, this requires removal of diode D1 (under the second POKEY), and the TK-II PIC firmware must be
updated (version 2.7j was tested with this).