Knowledge Center
Knowledge Center ➜ Entities

Valid Logic Systems

Supplier of gate-level descign system


Developed at Stanford and funded by the Navy, Structured Computer-Aided Logic Design (SCALD) was designed to help build supercomputers and was released into the public domain when the program completed. Over 150 copies of the tools were requested. Daisy Systems, Mentor Graphics, Valid Logic Systems and others all had copies of the source code. Within Valid, the entire system was rewritten so as to make it more technology independent.
SCALD specified a graphics editor, hierarchical design, simulation and timing verification. That became the baseline for EDA systems.

  • Known for: SCALD
  • Other names: Valid, SCALD
  • Type: Company