Path: utzoo!utgpu!attcan!uunet!mcvax!kth!draken!tut!santra!ylo From: ylo@sauna.HUT.FI (Tatu Yl|nen) Newsgroups: comp.unix.microport Subject: Re: Tatu Ylonen's SCSI driver Message-ID: Date: 19 Jun 89 11:37:18 GMT References: <8400@killer.DALLAS.TX.US> Sender: news@santra.UUCP Organization: Helsinki University of Technology, Finland Lines: 24 In-reply-to: wnp@killer.DALLAS.TX.US's message of 19 Jun 89 00:30:59 GMT > I would like to know whether this code is likely to work with > other SCSI adapters rather than the Seagate ST-01 - i.e. the Adaptec SCSI > adapter, etc. I would consider it very unlikely that it would work with any other adapter. The driver needs intimate information on the i/o ports, memory areas and dma channels used by the adapter. These are likely to differ greatly between different adapters. I would consider it unlikely that anyone would clone the ST-01. What I hve heard, the Adaptec adapters use dma. The driver does not support dma, as the ST-01 did not (and I did not have any documentation on how to use the dma channels in sysV/386). I have also heard that technical documentation of the Adaptec adapter would be hard to obtain; I haven't tried though. (Using a dma-driven controller would probably improve performance by several hundred percent from that obtained with the ST-01 (under msdos even it performs quite well, though). If there are no other criteria for selecting the controller and you can't get any other controllers to work, the ST-01 costs something like $50 (I don't know the price in the US). Tatu Ylonen ylo@hupu.hut.fi