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Intel: How should the order of adding multiple SOF files be when Quartus II Convert Programming Files is executed?

Please add and register from the top in the SOF Data column of Input files to convert according to the order of FPGA to be configured.

The SOF file entered at the top is the SOF file for the first FPGA (master), and the entry at the bottom is the SOF file for the last configured FPGA (slave).
 
When FPGAs are cascaded with nCEO and nCE, the device whose nCE pin is connected to GND can be determined as the first (master) device.

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