> -----Original Message-----
> From: Garrett Wollman [SMTP:woll...@khavrinen.lcs.mit.edu]
> Sent: Wednesday, June 02, 1999 9:13 PM
> To: Bruce Evans
> Cc: d...@nlsystems.com; woll...@khavrinen.lcs.mit.edu;
> curr...@freebsd.org; new...@atdot.dotat.org
> Subject: Re: IRQ sharing with newbus
>
> <<On Wed, 2 Jun 1999 16:17:36 +1000, Bruce Evans <b...@zeta.org.au>
> said:
>
> >> But the sio non-multiport stuff should be able to use RF_TIMESHARE.
> --
> >> If I'm not using my serial port, I should be able to use my
> >> infrared....
>
> > Preemptive timesharing would be hard to implement reasonably for
> irqs.
> > A uniform timeslice would have to be 86 usec to work properly for
> > unbuffered sio devices at 115200 bps.
>
> You're talking intervals about six orders of magnitude smaller than I
> am.
[ML] If I understand you correctly, you want to resource track
the IRQ's so if one device that uses one particular IRQ is active,
another one cannot be activated?
Example:
I have a modem on sio1 and digicam on sio3 (both on IRQ3). I
can either use my modem or download the photos, but not both at the same
time.
That would be nice. I don't known whether this is already
supported as I don't have sio3 :) (I don't have sio1 either :)
/Marino
> -GAWollman
>
> --
> Garrett A. Wollman | O Siem / We are all family / O Siem / We're all
> the same
> woll...@lcs.mit.edu | O Siem / The fires of freedom
> Opinions not those of| Dance in the burning flame
> MIT, LCS, CRS, or NSA| - Susan Aglukark and Chad
> Irschick
>
>
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