xcall XDEFLT, string
XDEFLT inserts characters (string) into the type-ahead buffer. The characters will sit in the type-ahead buffer until the next input operation, when they will act like they were typed at that point. If the type-ahead string contains carriage returns, and/or the next input operation is limited in length, then the unused remainder of the type-ahead string will be used on the subsequent input operation, until it is all used up.
