This page is for:
1) Requests-suggestions to add features to the VM, that is, features which cannot be easily added within the image
And:
2) You can't-won't do the feature for some reason: you lack expertise, hardware, and/or time.
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On UNIX you can fake it with a named pipe. From a shell run "mkfifo /tmp/fifo; sh /tmp/squeakfifo", then have Squeak write commands to that same fifo. – FeatureWishList
CommandShell
Several people would like to have serial support. I've hacked up primitive support for the Mac, but it's just open/close/read/write, no support for parameters such as baud rate etc. –