Aldec's popular VHDL/Verilog simulation engine is supplied as an OEM technology embedded in the Altium Designer installation "Altium has teamed up with Aldec to incorporate a built-in free OEM version of Aldec's ActiveHDL simulation engine. It operates seamlessly within the Altium Designer environment in place of the previous DXP simulator, providing better results and support for the simulation of Verilog and ""Do"" scripts.