Date: Sun, 21 May 1995 11:02:19 -0700 (PDT) From: "Rodney W. Grimes" <rgrimes@gndrsh.aac.dev.com> To: esser@ZPR.Uni-Koeln.DE (Stefan Esser) Cc: jkh@freefall.cdrom.com, CVS-commiters@freefall.cdrom.com, cvs-user@freefall.cdrom.com Subject: Re: Chinon CDROM Message-ID: <199505211802.LAA03537@gndrsh.aac.dev.com> In-Reply-To: <199505211733.AA07135@FileServ1.MI.Uni-Koeln.DE> from "Stefan Esser" at May 21, 95 07:33:44 pm
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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 ! I don't see any patch in that other mail, could you please send it to me under seperate cover. > } 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 ... Seems that the NCR bios code deals with these drives just fine, I had to make sure that I did not have a gross problem and brought up DOS/Windows with this drive on the NCR controller and it was dealt with, no problems at all. I should send in my Chinnon ISV stuff so I can get the firmware docs to this drive. Also the drive runs fine and in *SYNC* mode on a BT445, so something is wrong in the NCR code. I will produce the probe messages that show this for you when I next go to look at this drive. > } 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. Jordan would have to do that, I am using the same thing you are (Atlas series drives). > } 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. Famous last words :-) :-), send me the patch and I shall see! > } 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. :-(, can you give me the numbers from you data books, and the phone number for NCR, I'll call and order a set of the data books myself. > 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! :-) -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation Company Custom computers for FreeBSD
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