Date: Mon, 12 Aug 1996 14:06:08 -0700 (PDT) From: Ulf Zimmermann <ulf@Lamb.net> To: narvi@haldjas.folklore.ee (Narvi) Cc: freebsd-scsi@freebsd.org, hackers@freebsd.org Subject: Re: 2 AHA1542's in one box Message-ID: <199608122106.OAA03983@Gatekeeper.Lamb.net> In-Reply-To: <Pine.BSF.3.91.960812223426.7380I-100000@haldjas.folklore.ee> from Narvi at "Aug 12, 96 10:35:34 pm"
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> > > On Mon, 12 Aug 1996, Mark Murray wrote: > > > Hi > > > > Does anyone have any experience in putting 2 AHA1542 cards into one > > box? > > > > I tried this and have had no luck. Here is the saga: > > > > The first card is set to factory default and is an AHA1542C. The > > second has been moved to Port 0x240 DRQ 6 IRQ 9 and is an AHA1542B. > > After lots of fun-and-games while I actually got the card's strapping > > right :-), I can get the 1542C ^A-BIOS to do a diagnostic run on both > > cards and to probe for devices on both cards. > > > > Now - the first card works just fine. The second probes OK during > > FreeBSD boot, but hangs solid during the "waiting for SCSI devices > > to settle" pause. I have checked _everything_. The terminators are > > OK, the card works (strapped to factory default) in another machine, > > There are no DRQ/PORT/IRQ conflicts. > > > > The motherboard is a Megabyte G486 with an i486DX/50 and 16MB of RAM. > > > > Any clues? > > Hmm.... I'm not an expert with the Adaptec cards or with the PC bus > designs, but wasn't it so that there could be only one bus master on the > ISA bus? > > Sander > > > > > M > > -- > > Mark Murray > > 46 Harvey Rd, Claremont, Cape Town 7700, South Africa > > +27 21 61-3768 GMT+0200 > > Finger mark@grondar.za for PGP key > > > And another idiotic tale survived. No, it is not true. You can have more then 1 busmaster. To be exact if you have a CPU, a DMA chip and an Adaptec 1542, you already have 3 bus master ;-) Ulf. --------------------------------------------------------------------- Ulf Zimmermann, 1525 Pacific Ave., Alameda, CA-94501, #: 510-865-0204 Lamb Art Internet Services || http://www.Lamb.net/
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