Path: ns-mx!uunet!cs.utexas.edu!uwm.edu!linac!att!att!cbnewsd!bird From: bird@cbnewsd.att.com (j.l.walters) Newsgroups: comp.sys.apple2 Subject: Re: Sider and GS/OS Message-ID: <1991Oct20.221557.2941@cbnewsd.att.com> Date: 20 Oct 91 22:15:57 GMT References: <1991Oct15.051641.18332@crash.cts.com> Organization: AT&T Bell Laboratories Lines: 12 From article <1991Oct15.051641.18332@crash.cts.com>, by bubba@pro-amateur.cts.com (Eric Rankin): > Sider info, hardware, roms, etc. Try Larry Beyer, (312) 735-9010. I had a 10 Meg and Larry upgraded it to a 40Meg for a real decent price. -- Joe Walters att!ihlpf!bird IH 2A-227 (708) 979-9527 Newsgroups: comp.sys.apple2 Path: news.weeg.uiowa.edu!news.uiowa.edu!uunet!cs.utexas.edu!swrinde!sgiblab!pacbell.com!att-out!cbnewsd!bird From: bird@cbnewsd.cb.att.com (j.l.walters) Subject: Re: Questions about Sider hard drives Organization: AT&T Date: Sat, 19 Feb 1994 15:37:29 GMT Message-ID: References: <1994Feb17.190920.25829@a.cs.okstate.edu> Lines: 41 From article <1994Feb17.190920.25829@a.cs.okstate.edu>, by kennedd@a.cs.okstate.edu (Douglas W. Kennedy): > I have an old FCP Sider 10MB half-height hard drive. It makes this > loud screeching sound that drives me crazy. It's done this > for a long time (several years at least, it drove the former > owner insane, which is why I have it). > > What is causing this? Is there anyway to fix it? The noise is probably caused by a small piece of metal that is held to the body of the HD by a screw. One part of it rubs against the shaft of the HD as it spins. I understand this is to keep the case and the part that spins at the same electrical potential. Cures: 1. Loosen the screw and reposition the small metal piece. It probably has a dimple worn in it by now. 2. Same as #1 except you also grease it with the appropriate (?) grease. 3. Remove the damn thing and throw it away. That is what I did a couple of years ago a number of tries at #1 and #2, which did fix the problem for some months, and have had no (WHATS THAT NOISE COMING FROM MY HD??) problems to date. 4. Contact Larry Byer (Mr. Sider) Mr Larry Beyer 6115 S. Massasoit Chicago IL 60638 (312) 735-9010 (Call between 9:30AM and 1PM Central Time) > Is the Sider a SCSI drive, or some sort of proprietary system? ------------ Kind Regards, -- Joe Walters att!ihlpm!bird, NW 31-K14 (708) 224-7189 To know, and not to do, is not yet to know The Sider terminator info I posted was incorrect. This has the correct info. -Paul "Paul Grammens" wrote in message news:veevkoihm59815@corp.supernews.com... > I'm putting together some info on Sider hard disks for the Apple II. > Seems like the cables and terminators are commonly missing, so here is the > info needed to make your own cable from the Xebec interface card to the rear > panel, and the terminator which attaches to the Sider drive. > > I found most of this on the net, and took apart my terminator to > reverse-engineer it. > The only piece of info I'm missing is the DB37 to DB37 cable that goes from > the rear panel of the Apple II to the Sider drive. Comparing the terminator > to the ribbon cable, it does not appear that it is a straight-thru cable. > > If anyone has anything to add to this, please post it. > -Paul > > > > Materials: SCSI ribbon cable with header, 50 conductor. DB-37 female > connector. > > 37 pin 2x25 pin > D-Sub header > > 1 -> 1 > 2 -> 3 > 3 -> 5 > 4 -> 7 > 5 -> 9 > 6 -> 11 > 7 -> 13 > 8 -> 15 > 9 -> 17 > 10 -> 19 > 11 -> 34 > 12 -> 36 > 13 -> 38 > 14 -> 40 > 15 -> 42 > 16 -> 44 > 17 -> 46 > 18 -> 48 > 19 -> 50 > 20 -> 2 > 21 -> 4 > 22 -> 6 > 23 -> 8 > 24 -> 10 > 25 -> 12 > 26 -> 14 > 27 -> 16 > 28 -> 18 > 29 -> 20 > 30 -> 35 > 31 -> 37 > 32 -> 39 > 33 -> 41 > 34 -> 43 > 35 -> 45 > 36 -> 47 > 37 -> 49 > > Source: Sider Fixed Disk Drive Subsystem User's Guide 106109-01 Rev. D > > Also note that the drive needs a terminator plug on one of the two > ports on the back of the external drive. I tried, and I can't get my > drive to work without one. > ****************************************** Sider Terminator construction: The terminator has eleven outputs. Each output is connected to a two resistor voltage divider. The eleven voltage dividers are connected in parallel between 18 ground pins and one pin with +5V. Materials: Male DB37 connector. Eleven 330 Ohm resistors Eleven 220 Ohm resistors or a DIP resistor pack with these values. 220 ohm resistors, common pin is 29. I assume this has +5V. The junction of each pair of resistors goes to one each of pins 13, 14, 16, 20-27. 330 ohm resistors common pins are 1-10 and 30-37. I assume these are ground. __________________________________________________________ Pin 29 | | | | | | | | | | | | | | | | | | | | | | / / / / / / / / / / / \ \ \ \ \ \ \ \ \ \ \ Eleven 220 Ohm resistors / / / / / / / / / / / \ \ \ \ \ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | 0 0 0 0 0 0 0 0 0 0 0 Connect these points to | | | | | | | | | | | pins 13, 14, 16, 20-27. | | | | | | | | | | | / / / / / / / / / / / \ \ \ \ \ \ \ \ \ \ \ Eleven 330 Ohm resistors / / / / / / / / / / / \ \ \ \ \ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | ---------------------------------------------------------- Pins 1-10 and 30-37 > ***************************************** > This is from an Atari Xebec interface, but seems to be the same as the Apple > II Xebec. > > Table 2-3. Standard SCSi/SASI Signals > Direction Description Abbv Pin Notes > both Data bit 0 -DB(0) 2 > both Data b~t 1 -DB(l) 4 > both Data bit 2 -DB(2) 6 > both Data b~t 3 -DB(3) 8 > both Data bit 14 -DB(14) 10 > both Data bit 5 -DB(5) 12 > both Data bit 6 -DB(6) 14 > both Data bit 7 -DB(7) 16 > both Parity bit -FAR 18 N/C -- not supported > from MIO Attention -ATN 32 N/C -- not supported > to MIO Bus Busy -BSY 36 > from MIO Acknowledge -ACK 38 > from MIO Bus Reset -RST 40 > to MIO Message phase -MSG 42 Connected, not supported > from MIO Select Target -SEL 44 > to MIO Command or Data -CID 46 > to MIO Request Data -REQ 48 > to MIO Input or Output -I/O 50 > > I worked out some more info on the interface. The pinouts from the Atari Xebec card, my Apple II Xebec card (what I can determine by careful examination) and my Sider terminator all jibe, so I think this is accurate. It does look like a straight thru cable is all that is required between the Apple II rear panel and the Sider rear panel once this ribbon cable has been made. -Paul 37 pin 2x25 pin D-Sub header 1 -> 1 gnd 2 -> 3 gnd 3 -> 5 gnd 4 -> 7 gnd 5 -> 9 gnd 6 -> 11 gnd 7 -> 13 gnd 8 -> 15 gnd 9 -> 17 gnd 10 -> 19 gnd 11 -> 34 N/C on Xebec card 12 -> 36 -BSY 13 -> 38 -ACK Control w/term? 14 -> 40 -RST Control w/term? 15 -> 42 -MSG 16 -> 44 -SEL Control w/term? 17 -> 46 -CID 18 -> 48 -REQ 19 -> 50 -I/O 20 -> 2 Data bit 0 21 -> 4 Data bit 1 22 -> 6 Data bit 2 23 -> 8 Data bit 3 24 -> 10 Data bit 4 25 -> 12 Data bit 5 26 -> 14 Data bit 6 27 -> 16 Data bit 7 28 -> 18 N/C on Xebec card 29 -> 20 +5? Xebec card has jumper to this pin. 30 -> 35 gnd 31 -> 37 gnd 32 -> 39 gnd 33 -> 41 gnd 34 -> 43 gnd 35 -> 45 gnd 36 -> 47 gnd 37 -> 49 gnd Source: Sider Fixed Disk Drive Subsystem User's Guide 106109-01 Rev. D plus Atari Xebec card info.