Digital logic testing and simulation

About one and a half decades ago the state of the art in DRAMs was 64K bytes, a typical personal computer (PC) was implemented with about 60 to 100 dual in-line packages (DIPs), and the VAX11/780 was a favorite platform for electronic design automation (EDA) developers. It delivered computational power rated at about one MIP (million instructions per second), and several users frequently shared this machine through VT100 terminals. Now, CPU performance and DRAM capacity have increased by more than three orders of magnitude. The venerable VAX11/780, once a benchmark for performance comparison and host for virtually all EDA programs, has been relegated to museums,
replaced by vastly more powerful PCs, implemented with fewer than a half dozen integrated circuits (ICs), at a fraction of the cost. Experts predict that shrinking geometries, and resultant increase in performance, will continue for at least another 10 to 15 years.