Re: would a PCCard Sound device have insurmountable problems?
"M. Warner Losh" <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.mobile |
|---|---|
| Message-ID | <[email protected]> |
In message: <[email protected]> "John L.Utz III" <[email protected]> writes: : I am thinking about purchasing an ESS688 based PCMCIA soundcard for : my laptop. I don't think there's any pcmica soundcard support in FreeBSD at the moment. : I'm buying it for the midi part ( yes, i know that we dont have working : midi, but i dork around with the driver from time to time ). : : In order to support the midi in function, it would need two irq's. : : can we do 2 irq's yet? No. PCMCIA cards only have 1 IRQ. There's only 1 INT pin. There's some other signalling for bad battery and such that some cards abuse as a second interrupt, but we don't really support that at the moment. : are there other issues with going thru the pccard slot that would cause : noticable audio latencies? DMA isn't supported for 16-bit pcmcia cards either. The bridges require some funky setup to make this happen, and it is very bridge dependent, iirc. These are solvable problems, but aren't solved problems. Warner _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-mobile To unsubscribe, send any mail to "[email protected]"