Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!seismo!rochester!rocksanne!xrxns!toml From: toml@xrxns.UUCP (Tom Love) Newsgroups: comp.sys.atari.st Subject: Re: SCSI drives--how do you connect them to the DMA port? Message-ID: <205@xrxns.UUCP> Date: Fri, 10-Jul-87 08:18:18 EDT Article-I.D.: xrxns.205 Posted: Fri Jul 10 08:18:18 1987 Date-Received: Sun, 12-Jul-87 10:51:33 EDT References: <3559@watvlsi.UUCP> Distribution: comp Organization: EDDS/CAD, Xerox Corp., Leesburg, Va. (XICTMD) Lines: 44 Keywords: SCSI DMA hard disk Summary: response, plus references In article <3559@watvlsi.UUCP>, rpfeifle@watvlsi.UUCP writes: > What pins have to be connected to what lines, what pins have to be dropped > etc... > > Ron > -- > Ron Pfeifle > {decvax,allegra,ihnp4}!watmath!watvlsi!rpfeifle oh, sweet naivete... for better or worse atari's DMA and the industry-standard SCSI interface are far from equivalent. simply crossing a few wires won't do it for you; you need an adaptor board (not to mention a disk controller, unless your disk is *really* a SCSI disk, i.e. has its own built-in SCSI controller). i'm familiar with two companies making DMA to SCSI adaptors for the ST: Tech Specialties, in Houston, and Berkeley Microsystems, in Oakland CA. I know essentially nothing about Tech Specialties, except that i think they mostly do turnkey hard disk systems. i have done business with berkeley microsystem - i bought their adaptor, as well as an adaptek controller board, from them. i use mine to drive a quantum 540 HD. i've had no problems. the cost on these two boards is approx $125 each. for more info, see my article in the march "ST Applications" magazine entitled "a hacker's hard disk", wherein i describe my experiences putting together my disk system. if you can't find a copy of that mag, send me a sase and i'll send you a copy of the article (i could uucp the text, but you'd be missing the graphics then). i will be happy to do this for whoever would like a copy. [aside: i'm beginning to think that this newsgroup needs a "answers to commonly asked questions" article posted periodically, like that posted with the netiquette article.] good luck! tom love xerox edds p.o. box 2000 leesburg, va 22075 (703)729-8000 x5185 uucp: seismo!rochester!rocksanne!xrxns!toml xns: toml:lsbg-egp/cad:xerox