@whitequark in my case schematics were complicated to keep track of the connections coming through level-shifters. And I was just able to flip the numbers in array until the lines stopped crossing. Before I discovered jitx I was procrastinating on that for many months. Also got machine-generated constraints file for FPGA.

Routing was easy: bulk-select pins, hit shortcut to select counterparts; repeat for others; And created ground-planes + did gerber export in kicad. Was able to do it in <1h.

@whitequark i started using jitx a year ago to create an 48-data-pin adapters from old calculators/organizers to an FPGA Alchitry Au level-shifter, so I won't need to create new bespoke level-shifter boards for all the portable devices I want to poke at.

And creating a new adapter board for a new device was basically just defining a footprint for its connector (in code!) and after that <1h of laying two connectors on a PCB and defining a Device-to-FPGA pinout that will avoid crossed lines.