Date: Wed, 01 Sep 1999 16:15:13 +0200 From: Eric MASSON <e-masson@kisoft-services.com> To: "Chuck O'Donnell" <cao@bus.net> Cc: freebsd-mobile@FreeBSD.ORG Subject: Re: sound card irq with pcm driver Message-ID: <37CD34F1.9D48D4B0@kisoft-services.com> References: <19990901100010.C23976@bus.net>
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Hi, > The specs for a Dell Latitude CP (see below) say that IRQ 5 is > ``Reserved; generated by the audio controller'' If you can't change it in the bios, irq 5 is THE irq to use to make your soundcard work > 1) Should I attach the pcm driver to IRQ 5 Definitely yes, in the case you're in (your soundcard works :) ). > 2) When the specs say that IRQ 7 and 10 can be used for an audio > controller, are they referring to a separate piece of audio I think it means you can change the irq for the builtin soundcard to match 7 or 10 unless these two ones are used by another peripheral. (in these case, change pcm irq too :) ) Look in the bios settings to see peripheral/irq mapping. Hope it helps Eric MASSON > IRQ Line Assignments > > IRQ0: Reserved; generated by the system timer > IRQ1: Reserved; generated by the keyboard controller to signal that > the keyboard output buffer is full > IRQ2: Reserved; generated internally by the interrupt controller to > enable IRQ8 through IRQ15 > IRQ3: Available for use by a PC Card unless the built-in serial port > or infrared port is configured for COM2 (the default) or COM4 > IRQ4: Available for use by a PC Card unless the built-in serial port > is configured for COM1 (the default) or COM3 > IRQ5: Reserved; generated by the audio controller > IRQ6: Reserved; generated by the diskette drive controller to > indicate that the diskette drive requires the attention of > the microprocessor > IRQ7: Available for use by a PC Card or audio controller if the > built-in parallel port is disabled > IRQ8: Reserved; generated by the system I/O controller's RTC > IRQ9: Reserved; generated by the video controller > IRQ10: Available for use by a PC Card or audio controller unless the > C/Port Advanced Port Replicator or C/Dock Expansion Station > is attached > IRQ11: Generated by the USB and PC Card controllers; available for > use by a PC Card > IRQ12: Reserved; generated by the keyboard controller to indicate > that the output buffer of the integrated touchpad or external > PS/2 mouse is full > IRQ13: Reserved; generated by the internal math coprocessor > IRQ14: Reserved; generated by the hard-disk drive to indicate that > the drive requires the attention of the microprocessor > IRQ15: Reserved; generated by the CD-ROM drive in the modular bay to > indicate that the drive requires the attention of the > microprocessor -- Any opinions expressed above | Murphy's Law Corollary : are my own, not Kisoft's | Murphy was an optimist. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message
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