"Aldec FPGA simulation added to Altium Designer". ^ "The Ultimate PCB Design Software Comparison | SFCircuits".Its quite a few years old now, and there are more modern versions available from Altium, but I use it regularly at work and am always impressed with its capabilities. ACCEL markets the product under the name Tango-PCB. This site is aimed at sharing hints, tips and resources for users of Protel 99SE, a CAD software package for designing electronics.
The reference manual was re-written for the American market. In 1986, ACCEL Technologies, Inc., of San Diego, California, acquired marketing and support responsibilities for the product in the U.S., Canada and Mexico. It was originally written in 1985 by Nick Martin, of Australia, and sold under the name of PROTEL-PCB.
Protel PCB was marketed internationally by HST Technology since 1986. Originally it was sold only in Australia. It has roots back to 1985 when the company launched the DOS-based PCB design tool known as Protel PCB (which later emerged into Autotrax and Easytrax). Altium Designer was originally launched in 2005 by Altium, known at the time as Protel Systems Pty Ltd.