From: "Sebastian Herbszt" <herbszt@gmx.de>
To: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Qemu-devel@nongnu.org, kvm@vger.kernel.org,
Simon Bienlein <simon@linux-fuer-blinde.de>
Subject: Re: [Qemu-devel] Re: Question about KVM and PC speaker
Date: Wed, 6 May 2009 22:55:06 +0200 [thread overview]
Message-ID: <E97885C6D2F9452787A435FD179215B0@FSCPC> (raw)
In-Reply-To: <4A0167B7.2050200@siemens.com>
Jan Kiszka wrote:
> Sebastian Herbszt wrote:
>> Simon Bienlein wrote:
>>> Is a support for BIOS worked on right now?
>>
>> The vgabios (vgabios.c) has a "FIXME should beep". Volker, do you plan
>> to fix this?
>>
>> Which frequency should be used for the beep? Which delay?
>
> I would try 1 KHz and some hundred milliseconds.
I just looked at some vga bios and it uses about 896,45 Hz.
>> Getting a delay using "inb(0x61) & 0x10" is still a no go on qemu, right?
>
> Looks like (should be far too inaccurate for longer delays). What about
> 0x40:0x6c, the BIOS' daily timer counter?
The bios i looked at used the refresh request port 0x61. This is supported by bochs and
there is also a patch for qemu to replace the dummy [1]. The rombios uses this to provide
INT 15h AH=86h functionality; this is likely broken with the dummy code in qemu.
Anyway, using "timer ticks since midnight" should be possible (INT 08h handler is set up
before vga bios is called).
[1] http://article.gmane.org/gmane.comp.emulators.bochs.devel/7594
- Sebastian
next prev parent reply other threads:[~2009-05-06 20:56 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-22 19:02 [Qemu-devel] Question about KVM and PC speaker Simon Bienlein
2009-04-23 7:45 ` [Qemu-devel] " Jan Kiszka
2009-04-23 8:32 ` Samuel Thibault
2009-04-23 9:06 ` Kevin Wolf
2009-04-23 9:23 ` Samuel Thibault
2009-04-23 9:15 ` Jan Kiszka
2009-04-23 9:25 ` Samuel Thibault
2009-04-23 9:33 ` Jan Kiszka
2009-04-23 9:50 ` Avi Kivity
2009-04-23 10:29 ` Jan Kiszka
2009-04-23 11:09 ` Avi Kivity
2009-04-23 17:42 ` Jan Kiszka
2009-05-04 16:34 ` Simon Bienlein
2009-05-04 20:29 ` Jan Kiszka
2009-05-04 20:56 ` Samuel Thibault
2009-05-04 21:00 ` Jan Kiszka
2009-05-05 15:59 ` Simon Bienlein
2009-05-05 22:34 ` Sebastian Herbszt
2009-05-06 10:34 ` Jan Kiszka
2009-05-06 20:55 ` Sebastian Herbszt [this message]
2009-05-07 8:12 ` Jan Kiszka
2009-05-09 22:21 ` Sebastian Herbszt
2009-05-12 7:32 ` Jan Kiszka
2009-05-12 21:06 ` Sebastian Herbszt
2009-05-12 21:50 ` Jan Kiszka
2009-05-12 22:21 ` Sebastian Herbszt
2009-05-12 22:27 ` Samuel Thibault
2009-05-12 22:37 ` malc
2009-05-14 19:48 ` Sebastian Herbszt
2009-05-14 22:01 ` malc
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