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Xref: sserve comp.unix.bsd:2217 comp.os.linux:5867 Newsgroups: comp.unix.bsd,comp.os.linux Path: sserve!manuel!munnari.oz.au!uunet!stanford.edu!rock!fletcher!boyd From: boyd@cs.unca.edu (Mark Boyd) Subject: Re: Query: Drivers for AHA >1522< ? Message-ID: <1992Jul21.151240.6572@cs.unca.edu> Organization: University of North Carolina at Asheville X-Newsreader: Tin 1.1 PL3 References: <2A6B89E3.7DE5@tct.com> Date: Tue, 21 Jul 1992 15:12:40 GMT Lines: 22 I also have a 1522, which I purchased used a year or so ago. At that time I asked Roy Neese ( I think I have his name right ) of Adaptec about the differences between the 1520 and the 1540 series. Roy is active in comp.periphs.scsi and is an excellent source of info on Adaptech controllers. He said that the major difference is that the 1540 series has its own, on board microprocessor. Now that is a big difference, from a programmers point of view, because it means that the 1520 drivers have to interact with the SCSI interface chip(s) directly, while the 1540 drivers interact with the, much higher level, interface provided by the microprocessor and its firmware. As a result, it is much harder to write drivers for the 1520 series. I think some programming information is available from Adaptech's technical Support BBS ((408) 945-7727 8 data bits, no parity, one stop bit ), but I'm not sure that it is enough to write a driver. I think Roy did mention a technical manual ($$) which does have all the necessary information. I decided not to pursue this, but I hope Chip will 8^). It would be nice to have source for 1522 driver. Mark