Date: Sun, 21 May 1995 19:33:44 +0200 From: esser@zpr.uni-koeln.de (Stefan Esser) To: "Rodney W. Grimes" <rgrimes@gndrsh.aac.dev.com> Cc: jkh@freefall.cdrom.com, CVS-commiters@freefall.cdrom.com, cvs-user@freefall.cdrom.com Subject: Re: Chinon CDROM Message-ID: <199505211733.AA07135@FileServ1.MI.Uni-Koeln.DE> In-Reply-To: "Rodney W. Grimes" <rgrimes@gndrsh.aac.dev.com> "Re: Chinon CDROM" (May 21, 10:21)
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On May 21, 10:21, "Rodney W. Grimes" wrote: } Subject: Re: Chinon CDROM } Though this may have fixed the problem for the CDS-535 drive, } it does *not* fix the problem for the CDS-525 drive. I will Did you apply the patch and recompile with the options line that disables sending synch. negotiation messages ? Both are required ! } unbox the drive I have here and hook it up to a -current system } this week and do some more testing to attempt at getting you } some more error information. You need both a patch to the negotiation code and NCR_MAX_SYNC set to "0". But I think I've identified the situation that made the driver fail. These CDROM drives don't know about multibyte SCSI messages at all ! But they return a "Will Do Sync" bit in the SCSI-2 inquiry information ! This is obviously wrong, if they can't deal with the negotiation messages ... } I tried all sorts of things to make it work and it would not. } Also seems Jordan has had serious problems getting the Quantum } Grand Prix drives to run on NCR810 controllers, I have not } tried this here (I jumped from Empire to Atlas series drives). I'm using several Atlas drives. and they work fine. Don't know what's wrong with the Grand Prix. Send one, and I'll look into it. } Thanks for the work on getting the CDS-535 working, now let us } see if we can get the CDS-525 to work. Well, in fact I'm sure it WILL work with the driver changed to expect the kind of behaviour the drives show. } I tried to get to the NCR ftp site, but they moved it and the } new site did not have the programming docs for the chips, do } you know where I might find these??? Yes. The Symbios FTP site doesn't seem to offer much useful information. The programming docs where never available for FTP, but at least a catalog of current data books. Guess that Symbios will be one of the first to have chips available for the new 20MHz SCSI standard. Would be very interesting to have driver support from the beginning of availability of those chips! STefan -- Stefan Esser Internet: <se@ZPR.Uni-Koeln.DE> Zentrum fuer Paralleles Rechnen Tel: +49 221 4706017 Universitaet zu Koeln FAX: +49 221 4705160 Weyertal 80 50931 Koeln
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