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Valid Logic Systems

Supplier of gate-level design system
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Description

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.

ACQUISITION:

ACQUIRED BY:

DEPRECATION OF:

  • Valid Logic Systems used to be known as SCALD Corporation until 1981. Investors did not like the thought that people would be SCALDed.
  • Type: Company