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Ken's last note led me to look at magtape error handling, and it was not right. This has resulted in a lot of code changes in sigma_mt.c, but the changes are mostly mechanical. Instead of trying to be clever and do channel handling in mt_map_err or at the bottom of the mt_svc routine, every magtape command now does its own error handling. This makes the code repetitive, but I hope it is much clearer as a result.
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.