Digital Logic Simulation

Hi,
a few years ago i played around with a Digital Logic Simulator on RISC OS, but unfortunately lost the files and also can’t remember it’s name. Google research don’t yield any useful results. Any hints for me?
Egon

!ArcSimp, I have a demo version that works in 32 bit mode. Midas Software.

https://www.orpheusweb.co.uk/mijassw/

Thanks to all for the information, yes that was that software! :-)