what would make an SRAM not work post tapeout? if it's too big could we predict that it wouldn't work with spice sims ? are there any data available from the sky130 post tapeout tests that might show why some macros didn't work??

1. Undriven inputs (din0 undriven is definitely an error. Don’t know the effect of unconnected read only port inputs) https://github.com/d-m-bailey/extra_be_checks/discussions/27#discussioncomment-5903854 2. Unconnected power supplies, shorts, missing vias https://github.com/d-m-bailey/extra_be_checks/discussions/27#discussioncomment-5904780 3. Dnwell guardring connected to vssd https://github.com/d-m-bailey/extra_be_checks/discussions/27#discussioncomment-5905868 4. Looks like tying csb1 high might cause the read only dout buffer inputs to be Hi-Z. Not sure of the effect of all the buffers leaking. When EN is low, the DOUT inverter is driven by BR. However, with the read port disabled, BR is always Hi-Z. There may be a leak through 1007 and 1008.