Re: ASC/EASC audio device

[Robert Swindells <rjs%fdy2.co.uk@localhost>]

Nathanial Sloss <nathanialsloss%yahoo.com.au@localhost> wrote:
> Please see the diff at:
> ftp://ftp.netbsd.org/pub/NetBSD/misc/nat/asc-audio.diff

> it sould be applied via patch within the sys/arch directory.
>
> It allows the Enhanced Apple Sound Chip (easc) to be used as an audio
> device.
>
> The asc0 bell driver would not attach to the easc as it does not
> support wave table mode.
>
> With this driver a wsbell is provided for WSFB* kernels
>
> Currently recording does not work.
> 
> This should also work for the asc as well but I don't have the
> hardware to test so community feedback would be helpful.
>
> There are currently to compile time options (for which one will be
> chosen pending your feedback) in ascaud.c USE_INTRS.
>
> If USE_INTRS is set to 1 the default is to use interrupts to keep the
> devices sound buffers full.
>
> If USE_INTRS is set to 0 the sound buffers are kept full via
> scheduling a callout.
>
> Please let me know (I'm not subscrbed to the list) if this works on
> machines with the asc as well and what setting of USE_INTRS yields the
> best result.

Tried it on a Q950, with the default USE_INTRS enabled.

I don't think that interrupts are setup correctly, I just got a stream
of via2_noint(4) messages on the console when a beep was generated.