Date: Mon, 07 Oct 2013 13:46:53 +0100 From: Frank Leonhardt <frank2@fjl.co.uk> To: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> Subject: Re: How do I ring a bell? Message-ID: <5252AD3D.7070703@fjl.co.uk> In-Reply-To: <A174A047-CAC3-4872-91FE-BC8D1D8D9337@boosten.org> References: <52529CFF.9030105@fjl.co.uk> <A174A047-CAC3-4872-91FE-BC8D1D8D9337@boosten.org>
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On 07/10/2013 13:06, Peter Boosten wrote: > > On 7 okt. 2013, at 13:37, Frank Leonhardt <frank2@fjl.co.uk > <mailto:frank2@fjl.co.uk>> wrote: > >> In the good'ol days I could make UNIX ring a bell (literally) by >> sending \a to the console TTY (an ASR33 in my case). Now there's an >> electronic synthesised ting or beep from an terminal emulator IF it's >> got a sound card and so on, and an IBM-PC had a beep routine in the BIOS. >> >> Is there any way to make a noise through the built in "bell" speaker >> found on an IBM PC compatible server box? Writing 007 to the BIOS >> cout routine might do it, but I've realised I haven't got a clue how >> to do that. >> >> I could easily knock up a bit of hardware to go on a serial port (or >> similar) that could be triggered to make a noise, but these things >> have already got the hardware built in and I'm looking to use what >> I've already got. >> >> Thanks, Frank. >> >> P.S. "cdcontrol -f /dev/mycdrom eject" is the best I've come up with >> so far for getting attention. >> >> _______________________________________________ >> freebsd-questions@freebsd.org <mailto:freebsd-questions@freebsd.org> >> mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-questions >> To unsubscribe, send any mail to >> "freebsd-questions-unsubscribe@freebsd.org" > > echo "CTRL-V CTRL-G" should do the trick > Alas, not. The console driver won't ring the BIOS bell on anything I've tried. It might on a desktop with a built-in sound card and speakers, but it won't do anything with the "beep" speaker. It's actually the same solution I mentioned in the first line (\a translates to 007 which is ctrl-G). Then there's the issue of writing it to the console rather than a virtual terminal, but I have a few hacks that'll achieve that part. IIRC there was once a FreeBSD kernel module to drive the PC speaker (through /dev/pcspeaker or similar), but it seems to have gone or I'm confusing it with another BSD (or Linux). No I'm not. /usr/src/sys/dev/speaker/spkr.c(!) I may be close to a solution... Regards, Frank.
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