1.\" $FreeBSD: src/games/grdc/grdc.6,v 1.2.12.1 2001/10/02 11:51:49 ru Exp $ 2.\" 3.Dd Februry 21, 2021 4.Dt GRDC 6 5.Os 6.Sh NAME 7.Nm grdc 8.Nd grand digital clock (curses) 9.Sh SYNOPSIS 10.Nm 11.Op Fl s 12.Op Fl d Ar msecs 13.Op Ar n 14.Sh DESCRIPTION 15.Nm 16displays a digital clock made of reverse-video blanks 17centered on a curses-compatible terminal. 18.Pp 19By default, the clock runs indefinitely. 20When the optional numeric argument 21.Ar n 22is given, it stops after 23.Ar n 24seconds. 25Press the 26.Sq q 27key to quit immediately. 28.Pp 29The optional 30.Fl s 31flag makes digits scroll as they change. 32Over slow links, the scrolling option may have trouble keeping up. 33.Pp 34The default time taken to scroll the digits into view is 120 35milliseconds. 36The 37.Fl d 38option, which implies 39.Fl s , 40may be given to explicitly set the scroll duration. 41The maximum scroll duration is effectively 5 seconds. 42.Sh AUTHORS 43.An -nosplit 44.An Amos Shapir , 45modified for curses by 46.An John Lupien . 47