[esmi]

I used xcircuit, magic and irsim in university to make plenty of ASICs at MOSIS. Many universities still do. One can even get the NCSU PDKs for MOSIS for free. Totally compatible with 0.18u http://opencircuitdesign.com/magic/

[bsder]

Magic is sorta okay as long as you stick to low-performance digital or very small analog transistor counts.

The problem is that most of the "interesting" circuits for old tech nodes have a significant analog piece or RF piece--generally either ultra-low power(nanoamps) or higher voltages(15V+) or higher frequencies (2GHz+).

Both the simulation models as well as the tools to extract parasitics are extremely weak (or non-existent) on the open source front for analog and RF circuitry.

[LargoLasskhyfv]

Does this apply to the formerly commercial Bravo3VLSI from the 80ies, now available for free & open-sourced as Electric from https://www.staticfreesoft.com too?