Re: [Qemu-devel] [patch] minimal PC speaker output

[Fabrice Bellard <fabrice@bellard.org>]

Hi,

I think it would not be difficult to add a real speaker emulation with 
the audio API written by malc, at least to simulate tone generation 
using the PIT.

Regards,

Fabrice.

Joachim Henke wrote:
> Ok, although this ugly hack has nothing to do with real PC speaker emulation,
> it's probably the most portable way to have some noise anyway. I just post
> this for people (like me) who are missing their guest operating system beeps.
> For this case the patch below is "better than nothing" (c:
> 
> Greets
> Jo.
> 
> --- pc.c
> +++ pc.c
> @@ -276,6 +276,11 @@
>  static void speaker_ioport_write(void *opaque, uint32_t addr, uint32_t val)
>  {
> +    int spk_off = speaker_data_on ^ 1;
> +
>      speaker_data_on = (val >> 1) & 1;
>      pit_set_gate(pit, 2, val & 1);
> +    /* ring terminal bell, if speaker is switched on */
> +    if (spk_off & speaker_data_on)
> +        puts("*beep*\a");
>  }
>  
>