Guzunty Pi SPI device 0, 1 jumper select design notes

Now I am thinking to make a change to the SPI slect connections.  From the schematic diagram and the fitter's reports, it appears that all the 3 cores I played so far uses FB4MC15 as the select pin.  In other words, it is always selected as device 0.

One thing I am now trying is to connect PB0-26 pin 24 (CE0) and pin 25 (CE1) to be jumper selectable by hand to either 0 or 1.

Later I would try to use a demux IC HC137 to do the software selection.

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