@oe1cxw Does Yosys have an option to not insert IOBs? Equivalent to "out_of_context" mode in Vivado?
For the ice40 flow? In the ice40 flow IOBs are inserted by arachne-pnr, not yosys. So this is the default.
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Sorry should've clarified -- Vivado EDIF flow. When Vivado P&R reads the Yosys generated EDIF, it has IOBs...
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It should only if they are instantiated in HDL code. synth_xilinx does not infer IOBs.
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