These devices start disabled and will be that way in essentially all working systems, but there apparently was a DECnet Phase V support for this device, so it is added to all systems. The DPV should now be readily testable. As mentioned in #1152. That PR will fix the DUP device. This commit is explicitly released from any license restriction mentioned in the LICENSE.txt of the github.com/simh/simh master branch changes.
Open SIMH machine simulator
This is the codebase of SIMH, a framework and collection of computer system simulators.
SIMH was created by Bob Supnik, originally at Digital Equipment Corporation, and extended by contributions of many other people. It is now an open source project, licensed under an MIT open source license (see LICENSE.txt for the specific wording). The project gatekeepers are the members of the SIMH Steering Group. We welcome and encourage contributions from all. Contributions will be covered by the project license.
The Open SIMH code base was taken from a code base maintained by Mark Pizzolato as of 12 May 2022. From that point onward there is no connection between that source and the Open SIMH code base. A detailed listing of features as of that point may be found in SIMH-V4-status.