True. And at least some of us have now upgraded to Sound Blaster! :-D
Cheers,
M.
Daniël Mantione wrote:
Op Sun, 2 Sep 2007, schreef Mark Wood:
Naturally, this is not possible: The PC speaker is simply controlled by a
timer, which creates a square wave (on/off). In ancient DOS times there
was a trick by doing a frequency modulation, i.e. you turn the timer on
and off quite fast. But on Linux etc. the drivers don't support such
cheats.
<scratches chin> Hmmm... could you use that old Turbo Pascal code to do an
inline of the ASM for it? (talking completely through my hat having never
attempted such a thing on a linux platform)
If you run as root, acquire I/O port access and run SCHED_FIFO (so you are
not pre-empted), it might work.
However, as nowadays all PCs have a 16 bit audio possibility I don't see a
reason to do such ugly tricks with the PC speaker.
Daniël
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