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Studying RSX11M source code I found out that the original RP11 controller (vs. -C and -E later versions) was still supported in the software, and notably UMD (User Mode Diagnostics) was still capable of handing it and dealing with its testing, even in much later OS versions (compared to when the original RP11 was phased out). The change in this commit basically implements that flavor (which only supported the RP02 drives), and also makes a few minor fixes / cleanups for the device code, here and there. The default mode for the RP11 controller remains the more widely used -C/-E version, but if so desired, it can be downgraded to support its predecessor with the "SET RR <type>" command now.
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.
PLEASE NOTE
Do not contribute material taken from github.com/simh/simh unless you are the author of the material in question.
