{Ed: the code has been translated to SX but not tested}

Tony says that this source is changed a bit from the original project (to remove project specific features and to further document and clarify the code) and has been tested on his PC but may need to be debugged. A previous version of this code has been used on many PC's without problems. Features include, alt-key remapping, automatic key repeat, and using a small keyboard matrix to provide many standard PC key codes.

The source code is more of a tutorial on PC Keyboard interface than the author is willing to admit; this is how most programs * should be * commented. No warranty expressed or implied, etc.... Its still a valuable piece of code.

Source