Path: utzoo!mnetor!uunet!tektronix!reed!kamath From: kamath@reed.UUCP (Sean Kamath) Newsgroups: comp.sys.apple Subject: Re: Unidisk 3.5/Apple 3.5 Message-ID: <7925@reed.UUCP> Date: 12 Dec 87 06:02:49 GMT References: <8712100517.AA04037@crash.cts.com> Reply-To: kamath@reed.UUCP (Sean Kamath) Organization: Reed College, Portland OR Lines: 56 In article <8712100517.AA04037@crash.cts.com> pnet01!pro-sol!pro-charlotte!pro-connection!pro-novapple!bhoar@nosc.MIL writes: > >I know that the Unidisk 3.5 contains the same innards as an Apple 3.5, plus a >"smart" board that allows it to run with a simplified card on the //e and with >the new ROM on the //c. This is true. >Shouldn't there be a way (ie, recabling) to make the Unidisk 3.5 act like an >Apple 3.5 and gain direct access capabilities from the GS so that programs >like Diversi-Cache will work? The connector from the "smart" board to the >controller is the same as from the external cable to the "smart" board. There is. >(BTW, I've tried bypassing the smart board by removing the cable connection to >the smart board and reconnecting it directly to the controller...no >luck...powers on fine, but isn't recognized...maybe a few connections have to >be switched). This won't work. >Hope this gets to the network...two of my previous messages just >disappeared... It did. Well, when Robins 3.5 incher bit the dust (yeah, well, *DON'T* plug the thingie in with the power on! I didn't have the screws tightened down and it shook loose just enough to fry the sucker.), I went about trying to figger out what was bad. You can directly replace the disk assembly with a mac disk assembly (and therefor an Apple 3.5 disk assembly, as they are now the same thing). However, two things to note: A) you can't just remove the "smart" board. You do have to recable, and not in a small way. I'm amazed that removing the smart board didn't fry something. B) You have to be willing to give up the warrenty. Yeah, I know, no big deal, but this prevents a followup message about it. I can get the cabling info. It should be possible with existing equipment (I.e. you won't have to buy a 19 D sub-connecter. But that may be the best way). e-mail me, and I'll reply. If five or more people respond, I will post an article. It will be short (unusual for me, I know :-) Sean Kamath Ancient Architecture Fool of Reed tektronix!reed!kamath -- UUCP: {decvax allegra ucbcad ucbvax hplabs ihnp4}!tektronix!reed!kamath CSNET: reed!kamath@Tektronix.CSNET || BITNET: reed!kamath@Berkeley.BITNET ARPA: tektronix!reed!kamath@Berkeleyreed!kamath@hplabs US Snail: 3934 SE Boise, Portland, OR 97202 (I hate 4 line .sigs!)