test-drb June 2004

test-drb@ccmp.vtda.org

281 participants
616 discussions

by edward＠groenenberg.net

Hi all, Just a quick question, are the heads in an RK07 the same as in an RL02? They awfully look the same, so I was just wondering..... Ed --

19 years, 11 months

Brian Instruments BRIKON model 723 floppy drive tester/analyzer

by kennj＠telusplanet.net

Hello Joe, Thanks for your offer to copy the manual. That would be so helpful! I'm located in Calgary, Alberta, Canada, near the beautiful Rocky Mountains. In the interests of trying to help you with your analog cable problem, I'll try to describe what my unit has... Two ribbon cables come out the back of my unit: - A "normal" IBM-PC 34 pin ribbon cable with two connectors on the end (one that mates with the connector found on most 3.5 inch drives and one that mates with the PC-board-edge connector found on older 5.25 inch drives). - A wider 50 pin ribbon that mates with a PC-board-edge connector. I don't know what kind of drive this cable is for! There are also two male receptacles on the back near the center of the unit. - A 20-pin (2 X 10) connector that looks like it will mate with my old Apple II 5.25 inch floppy drives. I have not been brave enough to try it yet! - A 40-pin (2 x 20) connector of the same style as the above 20-pin connector (just longer :-) Inside the unit these two connectors are mounted on a small PC board, which then has a jumper to one of the unit's two plug-in "cards". This small PC board is fed an unregulated voltage, and has a linear regulator (+12 volt if I remember right) mounted on it. Aside from some capacitors, there's not much more on this board. The board looks more like an adaptor than anything else. Could it be you're missing this little adaptor board? If so, I can reverse engineer it for you. It wouldn't be the first time I've created a schematic from a populated PC board! Somewhere around here I have an Apple service manual that gives the pin-outs for the 20-pin floppy drive connector, though I would expect you should be able to find that on the web pretty easily these days. But if you need it, I'll dig it up. Finally, there's the leads to supply power to the drives under test: - one lead ends with a connector appropriate for 5.25 inch drives, and came mated with a short adaptor to fit 3.5 inch drives - the second lead ends with a strange 6 pin (2 rows of 3) connector that probably fits what ever monster the above 50 pin ribbon cable was intended to mate with :-) Please let me know if I can help. My email address (replace the Z with "@" and the X with "."): kennjZtelusplanetXnet (yeah, I already get enough spam!). Take care, Kenn > Kenn, > > I have two model 723s and a manual. I don't remember the details of the > options off the top of my head but I'll try to find the manual and scan it. > I THINK one of mine has some of the analog options but I don't have the > cables for them and I don't know the pinouts. Perhaps you can help with > that. BTW where are you loacted? > > Joe

19 years, 11 months

RK07 diskheads

by pete＠dunnington.u-net.com

On Jun 3, 9:08, Jason McBrien wrote: > Our resident DEC expert says they are, but he can't remember for sure. (He > used to fix them) > > > >From: Ed <edward(a)groenenberg.net> > > > >Just a quick question, are the heads in an RK07 the same as in an RL02? > >They awfully look the same, so I was just wondering..... That seems unlikely to me, because both RL02 and RK07 are 14" platters, but the RL02 has 512 cylinders and the RK07 has 815. That means the cylinders are closer together on the RK07 (385 tpi instead of 250 tpi, in fact), which implies they are also narrower. The RL02 has embedded (sectored) servo information on every track, the RK07 uses the fourth surface for the servo information. -- Pete Peter Turnbull Network Manager University of York

19 years, 11 months

RK07 diskheads

by jbmcb＠hotmail.com

Our resident DEC expert says they are, but he can't remember for sure. (He used to fix them) >From: Ed <edward(a)groenenberg.net> >Reply-To: "General Discussion: On-Topic and Off-Topic >Posts"<cctalk(a)classiccmp.org> >To: cctech(a)classiccmp.org >Subject: RK07 diskheads >Date: Thu, 03 Jun 2004 00:01:25 +0200 > >Hi all, > >Just a quick question, are the heads in an RK07 the same as in an RL02? >They awfully look the same, so I was just wondering..... > >Ed > >-- _________________________________________________________________ Stop worrying about overloading your inbox - get MSN Hotmail Extra Storage! http://join.msn.click-url.com/go/onm00200362ave/direct/01/

19 years, 11 months

8" hard sectored floppies

by pete＠dunnington.u-net.com

On Jun 3, 10:20, Ashley Carder wrote: > I have a DEC RX01 drive and the box of floppies that I have > with it are 8 inch single sided single density. Are 8" hard > sectored floppies compatible with these? No, RX01 (and RX02) are soft-sectored. Soft-sectored disks have one index hole punched near the centre, and an optical sensor detects this once per revolution, indicating the logical start-of-track. Hard-sectored disks have one hole per sector, and the sensor detects these to indicate start-of-sector; the first sector is distinguished because there's an extra hole (the index hole) punched halfway between two sector holes. -- Pete Peter Turnbull Network Manager University of York

19 years, 11 months

Data I/O device pinout codes

by aek＠spies.com

"29B" is the base programmer, you need to know what programming adapter you have. Unipak 2 or 2B is the most common but doesn't support some of the older parts. Select codes can be found at http://www.geocities.com/jkh9081/dataIO/ or on Data I/O's ftp site ftp://ftp.dataio.com/device_lists/_archive/

19 years, 11 months

paper tape replacement

by dwight.elvey＠amd.com

>From: "Jay West" <jwest(a)classiccmp.org> >> >http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=11805&item=381854314… =1 > >Thought some folks might be interested. > >Jay > Hi Jay Although, it is an interesting machine at $10, it isn't quite so interesting at $125. I do most the same thing now with my laptop when working on my Nicolet. I connect the serial to the Nicolet. When I actually have to read a punch tape, I made a cable to connect the laptop's parallel port ( bi-directional ) to a high speed tape reader I have. I keep the tape images in files and can even write to floppies, just like the machine on eBay ( wow! ). Dwight

19 years, 11 months

Hans Franke, are you listening?

by toresbe＠ifi.uio.no

I'm mailing this to CCTECH as I can't find Hans Franke's e-mail Hello, I was just googling about the Siemens 6-611 you offered to help me out with not too long ago, as somehow I missed your previous reply. Yes! Anything you have on this machine is most definitely interesting. Please tell me if you have anything at all, both docs and software are fun. (meanwhile, I'm STILL looking for the damned female-female DB9 cable for the terminal) I'll send pics when I get my camera back. Anyway, more info about the system. It's got a male DB9 port labeled Display Unit, which I'm assuming should lead to the CRT I've got here. It's got a port labeled Channel A, V.24, and one labeled Channel B, Adapter 1, and with a ballpen someone has written "current loop". There are seven more male DB9s, labeled Optional Cluster Terminal Connectors, seven in all. Now, the interesting thing is that the mainboard, and most of the circuit boards, are labelled Tandberg Data! (Tandberg Data is a Norwegian computer manufacturer, making fairly popular X terminals, and serial terminals too. Its serial number is 901504, It has a TAN number, 7001, which I don't know what means, but you probably do :) It has a diskette drive, 8". On the back of the unit is a list of options, including the disk drive, a Character Generator, a Cluster Interface Option, a Option Boards Mounting Kit. If their TANs or any other numbers matter, please mail me, and I'll give them to you. Additionally, the CRT has video in and out, are these PAL TV compatible? Thanks in advance!! (And, to the list, sorry for this, but I'm really eager to get this beautiful beast working :) ) -tsb "If it ain't broke, take it apart and find out why."

19 years, 11 months

Computer flooring/flooding/water in computer rooms

by mmcfadden＠cmh.edu

I will now tell you the most unusual water problem we ever had in out computer room. The drop ceiling above out Printronix and Versatec line printers collapsed on them. It dumped water and grunge all over the printers. The hammers on the Printronix rusted and we had to replace them. You ask how the water got in the ceiling well here is the story. Our computer center was on the 10th floor of an 11 story office building in the Northwest Plaza shopping center in Saint Louis. For Christmas the shopping center managers decided to install a very large Santa Claus on the roof, flown in by helicopter in 2 sections and assembled on the roof. The Santa was to be held up by a metal frame bolted to the roof. The installation crew drilled holes in the roof, missed the beam and punched right through the roof. They just shoved a little gravel over the incorrect hole and drilled a new one. The next melting snow and rain filled up the roof and drained through the hole into one of the unoccupied 11th floor offices above our computer room and then leaked down through the floor into the drop ceiling. The wet ceiling was too heavy and crashed down onto the printers. BTW After Christmas the Santa was lain down on the roof and covered by a tarp. You could see the tips of the boots under the tarp all year. Mike

19 years, 11 months

17 Apple Powerbooks wanted (UK)

by julesrichardsonuk＠yahoo.co.uk

Any UK collectors of newer Apple stuff out there? Someone from a TV company contacted Bletchley museum earlier wanting to hire 17 Apple Powerbooks to film. All of our stuff tends to be significantly older :-) Sounds like the machines don't need to be runners. If anyone does have a few (even if they don't have 17!) and is interested then shout and I can put you in touch. cheers Jules

19 years, 11 months

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test-drb June 2004