Date: Tue, 28 May 1996 00:11:40 +0200 (MET DST) From: Tomas Klockar <dateck@ludd.luth.se> To: se@zpr.uni-koeln.de (Stefan Esser) Cc: dateck@ludd.luth.se, hackers@freebsd.org Subject: Re: SCSI hostadapter Message-ID: <199605272211.AAA04240@father.ludd.luth.se> In-Reply-To: <199605272117.AA10020@Sparcy42> from Stefan Esser at "May 27, 96 11:17:18 pm"
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According to Stefan Esser: > On May 24, 7:51, Tomas Klockar wrote: > } Subject: Re: SCSI hostadapter > } According to Terry Lambert: > } > > I have a SCSI host adapter which I would like to use in freebsd > } > > The brand is NexStor NXT-82 > } > > Its a VL-Bus FAST SCSI-2 Host adapter > } > > Its using a a NCR 53C700-66 curcuit > } > > It memorymaps the data. > } >=20 > } > I believe the NCR 53c7xx series (I don't recognize the "53C700-66" > } > in particular, though) are not supported because they are very > } > low end components, for which no one has written a driver. > } >=20 > } > These are the same chips in AMD SCSI/Net ethernet/SCSI chips on > } > the motherboard of some Compaq systems. > } >=20 > } > You should use another card (~US$75 for an NCR 8xx series, one > } > of the best available), or write a driver (for which you will need > } > another working machine, or another card, and docs for the 7xx > } > chips; on the plus side, yyou should be able to use the 8xx > } > driver as a template). > } > } I looked around last night and linux seems to have support for this chip > } and all the other 7xx so i got all thier source for it, but i still could= > } =20 > } need some help while writing a deviced driver. > > No! > > Linux does not support the 53c700, > though it knows about the 53c710. > > (Support for the 53c710 could be > added to FreeBSD with little effort, > too.) > > The 700 is a very early version > with reduced capabilities. It is > far inferior to the 710 (and the > 810), and though the latter are > upwards compatible to the 700, the > 700 will need several driver changes > to be supported by the NCR driver > in either *BSD or Linux. > > } I just think it's better to suport as many cards as its possible to. > > Yes, sure. But since these 53c700 > controllers have been used only in > very few PC systems (mostly in the > i386 time frame), it is hardly worth > the effort. It seemed that it supported that. I found several patches. Well if you say so then your probebly right. I haven't digged in to it. I have a dump of my SCSI BIOS, in both hex and assembler. One of the reasons that I don't want to dump my card is that it has very high performance. It also have cache on the board. Since its a localbus card I assumes That its atleast as fast as any PCI card. And as usual its probebly the SCSIdisc that will be to slow. It might fix itself during the summer when I would like to upgrade my computer and I need to change motherboard. Then I need a new SCSIcard. I still feel like writing a driver but I could use some help from someone. I don't have the hardware specifications on this NCR53c700-66 chip. I would appriciate if someone could help me get thoose documents. /Tomas -- Tomas Klockar can be found at the following adresses: Kårhusvägen 4, 2:43 | Furuvägen 102 | dateck@ludd.luth.se 977 54 Luleå | 871 52 Härnösand | dateck@solace.mh.se Tel: +46-920-229391 | Tel: +46-611-13393 | d94-tkl@sm.luth.se
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