Both were started with the same primitive logic-gate schematic, but to save area, the custom house chose to convert from static logic to precharged logic. Unfortunately ... At that time, CDI was making metal-gate CMOS gate arrays, and was just planning an oxide-isolated silicon-gate CMOS array. ... It aquot;simulated everythingaquot; with LOGIC 5, which helped pull out the timing problems. ... Bob believes that the real surge in CAD will come with the eased wire-routing that this technique affords.