Hi.
First, I hope you are fine and the same for your relatives. I sent a patch to file which implements the detection of PCjr cartridge file based on the information given in this bug report. The patch was merged yesterday so this bug should now be fixed: https://github.com/file/file/commit/6fc66d12c0ca172f4681adb63c6f662ac33cbc7c Le met know if I made a mistake in my implementation. Best regards.