Boot manager beep
Scott Long
scottl at samsco.org
Fri Dec 9 06:55:11 PST 2005
Thomas E. Zander wrote:
> Hi,
>
> just installed a fresh 6.0 on a laptop, using the standard boot
> manager. The problem is: The default volume of pcspeaker can't be tuned
> in bios or anywhere else before loading a sound driver (in this case
> snd_ich). This especially means the pc speaker volume is always set to
> 100% at every boot which results in a horribly loud beep which I am
> afraid the built-in "speakers" can't do very often :-)
>
> So what about this one:
>
> --- /usr/src/sys/boot/i386/boot0/boot0.S
> +++ boot0.S
> @@ -201,9 +201,7 @@
> /*
> * Start of input loop. Beep and take note of time
> */
> -main.10: movb $ASCII_BEL,%al # Signal
> - callw putchr # beep!
> - xorb %ah,%ah # BIOS: Get
> +main.10: xorb %ah,%ah # BIOS: Get
> int $0x1a # system time
> movw %dx,%di # Ticks when
> addw _TICKS(%bp),%di # timeout
>
> This might be an issue on other architectures (amd64?) as well, I
> haven't checked that right now.
>
> TIA,
> Riggs
>
The beep is useful for some people who run headless systems, but it
is indeed annoying for others, especially with laptops in quiet places.
We should probably conditionalize this on a variable that can go into
/etc/make.conf. Note that amd64 uses the i386 bits here.
Scott
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