Osmin RTOS
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A brief on the Osmin operating system kernel is available in the [/download/dauug-36-preprint.pdf|preprint] (pp. 61--64).

Osmin kernel release notes
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The Osmin source code fits entirely in `os.a` because `XA|36` presently expects program source to be in one file. See the `makefile` in the same directory for more hints. All this could be documented better.

Osmin presently loads three short user programs `clock`, `color`, and `groot` and runs them concurrently. All three write to `io/file-00pts1` which is ordinarily symlinked to a tty. Osmin writes console messages to `io/file-000pts`, which is also symlinked, and any errors detected by `bootload.a` (which loads Osmin) are sent to the same destination. The `makefile` has a `TTY` variable that should point where you want `XA|36` output to go. You may need to tweak `makefile` and the symlinks to reflect whatever ttys you have on hand to see the results.

Once you sort out your ttys, `make os.all` from the `netsim` directory should assemble and start the operating system, bootloader, and its tests. If you don't need everything reassembled, a `make os` should run the test.

The test programs `api.a`, `echo.a`, and `user1.a` have no particular merit and are in flux. `echo.a` is the only program as of March 2024 that reads keyboard input.