Date: Sat, 10 Oct 1998 11:36:03 +0200 From: "H. Eckert" <ripley@nostromo.in-berlin.de> To: Christoph Weber-Fahr <listmail@helena.callcenter.systemhaus.net> Cc: freebsd-isdn@FreeBSD.ORG Subject: Re: what's wrong with a1 and irq 2 ? Message-ID: <19981010113603.27480@nostromo.in-berlin.de> In-Reply-To: <199810092100.XAA10590@helena.otelo-call.de>; from Christoph Weber-Fahr on Fri, Oct 09, 1998 at 11:00:54PM %2B0200 References: <199810091511.RAA10239@helena.otelo-call.de> <199810092100.XAA10590@helena.otelo-call.de>
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On Fri, Oct 09, 1998 at 11:00:54PM +0200, Christoph Weber-Fahr wrote: > > > There seem to be two different flavours of the > > > AVM-card around. Older ones, where you have to jumper the IRQ line > > > and newer ones, where the IRQ line is set by software. > > > > It is a revision 2.0 card. 8 bit. It has jumpers for IRQ 2,3,4,5,6,7 > > and IO 200, 240, 300, 340. (I never saw a newer one. Are those 16-bit > > cards ?) Yes (I'm using 0x240, irq 12). Do you have an ISDN plug on the card ? I've seen an old T*l*s card that has a sub-d9 instead... > I tried it with a changed IRQ. Replaced the 8bit SCSI with an equally > bad 16bit version, thus freeing IRQ5, which is now used by the A1. SCSI doesn't seem too important then :-) I've only got an Adaptec 1510 for my QIC150, too. If you could get one a 1541C is an excellent card for ISA SCSI. > > it indeed seems to compete with the vga card for the interrupt. VGA cards don't necessarily need an irq. Mine doesn't for sure. > > Another observation I made is that the card seems to put a heavy > > interrupt load on the machine. Top gives an interrupt load of > > around 10% while the card is under load, with occasional (rare) > > peaks up to 50 %. This is a 486/50 (ISA only) System. I didn't observe my interrupt loads closely but I can't say my system (pure ISA 486/50 as well) gets significantly burdened by it. But then I'm still using the ancient bisdn at home... > I don't think this interrupt stuff is 'normal'. This is eating 10% > of the computing power of a 486/50 with only one B channel used. 10% interrupt load != 10% of the system. > On the other hand I can put the same card into a lousy 386sx/16 and > blast 2 simultaneous IDTrans sesssions with full speed over both B > channels under good plain old DOS. (I've done that!). There > must be some problem in the driver somewhere, which AVM's own > DOS CAPI driver doesn't have. I bet the DOS stuff is polled and not interrupt driven. Greetings, Ripley -- http://www.in-berlin.de/User/nostromo/ == "You don't say what kind of CD drive or hard disks you have, but since it is causing you trouble I'll assume it is IDE." -- comp.unix.bsd.freebsd.misc To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isdn" in the body of the message
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