Q. Where is the dtools documentation?

A. Some tools have manual pages, these are installed in $(prefix)/man
Additional plain-text docfiles are installed in $(prefix)/share/doc/dtools



Q. I want to simulate a cell that has no inputs but has
outputs.(It changes as the clock ticks)
How would I put this in my .in file?

A. You can't.  You can provide a dummy input that goes to a transistor that
doesn't do anything.

But are you sure the cell doesn't need some kind of reset signal anyway?
If it is clocked, it must have some internal state, and you've got to
initialize that state at powerup, otherwise it will just circulate X's.

If its not clocked and has no inputs, it must be somting like a ring
oscilator, and it doesn't make sense to simulate those in irsim anyway. To
run them in hspice, just write the cmd file from scratch.

