Changes to README-plan9.md. All files

README-plan9.md

new file mode 100644@@ -0,0 +1,16 @@+# _Tcell_ on Plan 9++> [!NOTE]+> Plan 9 is supported on a best-effort basis, as the main _Tcell_ development team does not have a Plan 9 environment.++The Plan 9 backend opens `/dev/cons` for I/O, enables raw mode by writing `rawon`/`rawoff` to `/dev/consctl`.+It watches `/dev/wctl` for resize notifications.++The default mode for `vt((1)` is VT100, which will only provide basic monochrome text, and few additional features.+In this case, it is expected that `TERM=vt100` is set.++It may be possible to emulate more modern terminals using `-2` (VT220), `-a` (ANSI), or `-x` (XTerm) flags to `vt`.+While this has not been tested, the use of `-x` to get xterm like features, combinerd with a `TERM=xterm` may yield superior results,+including possibly color and mouse support.++Note that if _Tcell_ does not find a suitable value for `TERM` in the environment, it will assume XTerm like functionality.