The AppleCrate II is made from 17 Enhanced Apple //e main boards. (Fifteen of these boards were obtained in the same eBay auction that netted the eight unenhanced boards for the original AppleCrate.) Because they are enhanced ROMs, the original NadaNet boot ROM code would not fit and a new boot protocol had to be developed, as described below…
Instead of mounting the cards vertically in a frame, as in the original, I decided to mount them horizontally in a stack secured with standoffs—3/4″ long hexagonal rods, each with a screw protruding from one end and a tapped hole in the other. The AppleCrate II has nine “columns” of these standoffs—six metal columns at the back and corners of the boards and three nylon columns interior to the boards to add stiffness, as shown in the photo below at the 2-board construction stage.
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