constant noise from pc-speaker due system bootup

[Fabian Thorns <fabian_(_at_)_thorns_(_dot_)_it>]

Hi there,

i just installed OpenBSD 3.4 on an old ibm-system (it's a small pentium). the 
installation went well, but i got shocked while i tried to boot the system. 
due the kernel displaying information on the floppy device, the speaker of 
the pc begins to make a loud and constant sound. this sound doesn't 
disappear, even though the system continues booting up like nothing happened 
(at least as long as i let the system run, the sound was terribly :-)

did anybody saw this behavior before? what could i do in order to keep the 
system silent instead of disconnection the speaker (what would make normals 
beeps also disappear).

Thanks and best Regards

Fabian