.\"***************************************************************************
-.\" Copyright (c) 2010,2013 Free Software Foundation, Inc. *
+.\" Copyright (c) 2010-2013,2015 Free Software Foundation, Inc. *
.\" *
.\" Permission is hereby granted, free of charge, to any person obtaining a *
.\" copy of this software and associated documentation files (the *
.\" authorization. *
.\"***************************************************************************
.\"
-.\" $Id: curs_variables.3x,v 1.6 2013/12/21 18:41:32 tom Exp $
+.\" $Id: curs_variables.3x,v 1.8 2015/08/22 23:33:22 tom Exp $
.TH curs_variables 3X ""
.de bP
.IP \(bu 4
.SH PORTABILITY
ESCDELAY and TABSIZE are extensions,
not provided in most other implementations of curses.
+.PP
+ESCDELAY is an extension in AIX curses:
+.bP
+In AIX, the units for ESCDELAY are \fIfifths\fP of a millisecond.
+.bP
+The default value for AIX's ESCDELAY is 0.1 seconds.
+.bP
+AIX also enforces a limit of 10,000 seconds for ESCDELAY;
+this implementation currently has no upper limit.
+.PP
+This implementation has long used ESCDELAY with units of milliseconds,
+making it impossible to be completely compatible with AIX.
+Likewise, most users have either decided to override the value,
+or rely upon its default value.
.SH SEE ALSO
\fBcurses\fR(3X),
\fBcurs_opaque\fR(3X),