Re: [Gnucap-devel] Commercial BSIM4 model crashes gnucap

[Felix Salfelder]

On Sun, Nov 11, 2018 at 09:02:29PM +0100, Ruben Undheim wrote:
> So modelcard.nmos contains literal values for all the model
> paramaters, while my model use .params all over the place. I tried
> replacing some of the numbers with expressions, and then I get some
> messages also for that:
> 
>   parameter mismatchflag-4 not specified, using default
> [..]
> 
> after setting:
>   TCJ     = 'mismatchflag-4'

Dear Ruben.

this is a bit odd. but i can't say much without a complete example.
note that you can declare parameters before or after the model.  while
both ways work, in the second case you see the warning.

Gnucap sessions are interactive. this way a warning as an immediate
response to the input read.

> So, maybe just gnucap does not support using .params like this? Is the
> syntax just different or is that functionality missing maybe?

in spice language mode, gnucap should process spice like parameters as
the usual spice implementations do. note that there are some differences
in how well that works.

spice has been designed for punch cards, and tweaked in many different
directions since then. Gnucap also understads verilog. to get an
incomplete idea, spice is to verilog is to system-verilog roughly like
fortran is to C is to C++.

hth
felix