test-drb

test-drb@ccmp.vtda.org

101090 discussions

by cc＠informatik.uni-stuttgart.de

While looking at datasheets of 3.5" floppy drive motor control ICs, the LB1813 apparently supports four different speeds "out of the box". Pins 15 and 16 are used to select 300, 360, 600 or 720 RPM. So, I know 3.5" drives with one of the first three speeds, but has anyone ever seen a 720 RPM drive? A drive with that IC would be the very common Mitsumi D359. Christian

17 years, 4 months

Steve Wozniak on DWTS

by halarewich＠gmail.com

hey I just found out that Steve Wozniak will be on the next season of ABC's Dancing With The Stars here is the link for eny one who is interested http://www.realitytvworld.com/news/abc-reveals-dancing-with-stars-eighth-se… Chris

17 years, 4 months

looking for some Kennedy 9100 boards

by electrowen＠videotron.ca

Hi, I was looking for people who might have a Kennedy tapedrive for sale, either working or not, and I stumbled upon your ad. I know iT's been like year, but, are you still looking for those boards for your 9100 tapedrive? Or did you find them? Owen W. (I used to own a 9100 and my friend had tow others. Gov't auction)

17 years, 4 months

Badly corroded battery...

by aliensrcooluk＠yahoo.co.uk

Hi, My brother has requested to borrow a CD. So whilst hunting around for it I came across his old walkman. However, I had not realised that it still contained a battery in it. The walkman is over 15 years old, and since my brother moved out around 2002 it makes the battery atleast 7 years old! Here is a link to a page I quickly set up with some pics: http://www.geocities.com/aliensrcooluk/public/BatteryInWalkman.html The reason I am emailing the group, is because a power adaptor (wall wart) was sat underneath the walkman and has some brown paint-like marks on it. I am assuming this is from the battery and am wondering what is the safest way to clean it off without ruining the adaptor. The adaptor is used to run some of our modified table-top games (which originally ran from batteries, but have been modified so that they run from the adaptor instead). Regards, Andrew B aliensrcooluk at yahoo.co.uk

17 years, 4 months

DEC floppies on ebay

by pat＠computer-refuge.org

Is anyone here planning on bidding on this, and who's willing to image these disks? http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220356462708 I'd be willing to get them just to make images, and if someone else wants the physical disks I'd be happy to go in on bidding on them, and send that person the disks after I make images of them. Or, if someone else wants to get them to make images themselves, that'd be fine too. Pat -- Purdue University Research Computing --- http://www.rcac.purdue.edu/ The Computer Refuge --- http://computer-refuge.org

17 years, 4 months

DSD880 Diskette claimed

by jeff.kaneko＠juno.com

Ah, now I have an excuse to pull all of my DEC stuff out of storage. ;^) -- Patrick Finnegan <pat at computer-refuge.org> wrote: On Sunday 08 February 2009, Bruce Lane wrote: > The DSD 880 diagnostics diskette has been claimed. Jeff Kaneko was > the lucky(?) winner. Good, now the rest of us know who to harass about getting an image. :) Pat -- Purdue University Research Computing --- http://www.rcac.purdue.edu/ The Computer Refuge --- http://computer-refuge.org ____________________________________________________________ Compete with the big boys. Click here to find products to benefit your business. http://thirdpartyoffers.juno.com/TGL2141/fc/PnY6rw2USkyYum1s3vN5M8ubUB4x89I…

17 years, 4 months

DSD880 Diskette claimed

by kyrrin＠bluefeathertech.com

The DSD 880 diagnostics diskette has been claimed. Jeff Kaneko was the lucky(?) winner. Thanks to all for your interest. -=-=-=-=-=-=-=-=-=-=-=- Bruce Lane, Owner & Head Hardware Heavy, Blue Feather Technologies -- http://www.bluefeathertech.com kyrrin (at) bluefeathertech do/t c=o=m "Quid Malmborg in Plano..."

17 years, 4 months

xa 2.3.5 released

by spectre＠floodgap.com

The xa 6502 cross-assembler package has been updated to version 2.3.5. This version fixes a bug with the .bin pseudo-op and character sets, adds PETSCREEN and HIGH character sets, adds the .aasc pseudo-op, and has multiple small custodial and bug fixes. It will compile on most systems with an ANSI C compiler, can generate code for all NMOS and most CMOS variants of the 6502 and the 65816, and is known to work on Win32, most Un*ces and Mac OS X. It is licensed under GPL. http://www.floodgap.com/retrotech/xa/ -- ------------------------------------ personal: http://www.cameronkaiser.com/ -- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com -- There are few problems that the liberal usage of high explosives can't cure.

17 years, 4 months

Broken stuff for sale

by silent700＠gmail.com

Or possibly not broken? I have two items which I must part with as part of The Great Reduction of 2009: - Epson HX-20 Portable; no AC adapter; could not power it on with any AC adapter in my stable; fair cosmetic shape, some sticker residue; has micro-cassette drive module - STM Pied Piper CP/M Computer; I plugged it in and Magic Smoke was released; a competent technician (i.e. not me) can probably fix this easily; comes with a box of 5.25" floppies which may or or may not contain CP/M and other Pied Piper goodies, a Dealer Guide, some brochures for an STM 80186 machine and whatever else I can find Shipping on these items will be from 60074. I have scanned the scannable items from the Pied Piper and they are up at chiclassiccomp.org. Asking price is whatever you feel it's worth for me to box something up and send it out, plus actual shipping. In other words, please give these fine machines a home. -j -- silent700.blogspot.com Retrocomputing and collecting in the Chicago area: http://chiclassiccomp.org

17 years, 4 months

S-100 backplane board spacing

by lynchaj＠yahoo.com

Hi! Is there any sort of a standard for S-100 backplane spacing? I measured a couple of backplanes I have (a VG and another one) and they both measured .375" (3/8") gap between the connectors. That seems rather closely spaced to me if the boards are 3/4" apart if the connectors are 3/8" wide themselves. What would be the minimum useful gap between S-100 connectors for a small hobbyist S-100 backplane? I presume 3/8" gap is not enough if you want to accept prototype boards with wire wrap sockets and maintain some clearance. Any constructive thoughts on the subject much appreciated. Thanks and have a nice day! Andrew Lynch

17 years, 4 months

S-100 backplane board spacing

by lynchaj＠yahoo.com

S-100 backplane board spacing Al Kossow aek <mailto:cctalk%40classiccmp.org?Subject=S-100%20backplane%20board%20spacing& In-Reply-To=> at bitsavers.org Fri Feb 6 09:13:35 CST 2009 * Previous message: S-100 backplane board spacing <http://classiccmp.org/pipermail/cctalk/2009-February/268634.html> * Next message: Some Microtek MICE documentation <http://classiccmp.org/pipermail/cctalk/2009-February/268620.html> * Messages sorted by: [ date ] <http://classiccmp.org/pipermail/cctalk/2009-February/date.html#268616> [ thread ] <http://classiccmp.org/pipermail/cctalk/2009-February/thread.html#268616> [ <http://classiccmp.org/pipermail/cctalk/2009-February/subject.html#268616> subject ] [ author ] <http://classiccmp.org/pipermail/cctalk/2009-February/author.html#268616> _____ > does anybody have a handle on where I > could obtain 5 S100 edge connector sockets? You also need to specify the spacing of the circuit and component side pins on the connector for your backplane. There are at least two different spacings that were used. Most were the wider style, early MITS backplanes had closer spacing. _____ * Previous message: S-100 backplane board spacing <http://classiccmp.org/pipermail/cctalk/2009-February/268634.html> * Next message: Some Microtek MICE documentation <http://classiccmp.org/pipermail/cctalk/2009-February/268620.html> * Messages sorted by: [ date ] <http://classiccmp.org/pipermail/cctalk/2009-February/date.html#268616> [ thread ] <http://classiccmp.org/pipermail/cctalk/2009-February/thread.html#268616> [ <http://classiccmp.org/pipermail/cctalk/2009-February/subject.html#268616> subject ] [ author ] <http://classiccmp.org/pipermail/cctalk/2009-February/author.html#268616> _____ More information <http://www.classiccmp.org/mailman/listinfo/cctalk> about the cctalk mailing list _____ -----REPLY----- Hi! Thanks Al! My question is really what are the commonly accepted standards for appearance, casing, etc. I agree there seem to be an early "narrow" width and a later "wide" width between S-100 connectors. Is there a standard or commonly accepted practice for center to center "wide" board spacing or is it arbitrary? My intent is for a small (4 slot) motherboard used for hobbyist prototyping not a full blown system. The primary application would be the development of new peripherals using prototype boards. I expect that the use of wire-wrap sockets would be common requiring some clearance on the copper side and that the ICs and passives would be socketed. My estimates are that wire-wrap sockets need just bit over 1/2" clearance on the copper side and that most socketed ICs/passives require 1/2" clearance on the component side. Allison's estimate of 1" centers for the boards seems like a reasonable compromise. It won't get every possible combination but enough to be useful. The purpose is to allow low cost prototyping not for a full blown long term system installation. Cost is of primary importance which translates to little PCB surface area as possible while still being useful. BTW, Digikey carries a couple of types of S-100 compatible connectors but they are not cheap. Sullins and EDAC 0.125" spaced, 50 position, 2 row, 100 pin, PCB through hole solder tails card edge connectors run from about $8 to $12 a piece. I can get them surplus occasionally. eBay sells them too but are the wire-wrap variety which would work but is a gross abuse of a wire-wrap connector to solder it into a PCB. It can be done but I wouldn't tell anyone about it. :-) Thanks and have a nice day! Andrew Lynch

17 years, 4 months

Atari ST floppy drive?

by dbetz＠xlisper.com

I'm trying to recover some files off of a couple of Atari SH204 hard drives but I only have a 520ST and need to find an external floppy drive to bootstrap my system. Does anyone have a spare Atari SF314 floppy drive around that they'd be willing to part with? I don't have much classic stuff left so I guess this will have to be a sale rather than a trade. Thanks, David

17 years, 4 months

Microdata 6000 and Printronix P-600 printer in Edison, NJ

by wmaddox＠pacbell.net

There is a Microdata 6000 and a Printronix P-600 printer in Edison listed on eBay. He's also listed a Cipher tape drive, which is installed in the Microdata. The seller seems to want to get rid of these in very short order, and wants the stuff picked up tomorrow for an auction closing today. There are no bids, and I doubt he's going to get any. Anyone near Edison want to pick this stuff up for a steal? I have fond memories of the Printronix at CMU in the 80's, and hate to think he'll scrap it. --Bill Ebay Item #s 300291062623 300291065881 300291064691 http://cgi.ebay.com/Used-Microdata-6000-System-with-Cipher-Hi-Density-tape_… http://cgi.ebay.com/Used-9900-Cipher-Hi-Density-tape-DRIVE-REEL-TO-REEL_W0Q… http://cgi.ebay.com/Used-Printronix-P-600-600-LPM-Printer-Genicom-Tally_W0Q…

17 years, 4 months

speaking of 3.5

by melamy＠earthlink.net

I been "listening" to most of this thread so, forgive me if I already mention an idea that someone has already brought up... I seem to recollect that when I was working on hard sector floppy drives back in the Northstar Horizon system days, that the controller only wrote a block of data for each sector with basically nothing in between. It saw an index hole, wrote the block and then waited for the next index hole to write the next sector. If you want to recreate index holes for reading a hard sectored floppy, it seems you could detect the end of data from the previous sector and then generate a accurate index hole for the upcoming sector. Use the single index to reset the sector count if you are keeping track of that. Obviously, this is only a solution for reading the disk best regards, Steve Thatcher > >Hi Chris > I was recently looking at my Teac drive's index pulse to see how it >worked relative to the drive going ready ( the problem of trying to >find a way to recreate the /Ready signal ). > One thing I noticed was that the leading edge of the index pulse >was as accurate as my scope could show but the trailing edge was >all over the place. > My thinking is that the drive is controlled by a servo loop. >The leading edge is when a crystal clock says the pulse is suppose >to start and the trailing edge is when the actual edge is detected. >If one timed the length of time between the two edges, one would >then know the corrective response of the loop. > As an example, if the pulse was long, you'd keep a similar software >wheel rotating that you apply a correction to by the amount the >pulse was long. > It would be this internal software generated wheel that you'd use >to create the index pulses from. > You need the code to watch the drive to determine the parameters >of the control system, gain, dampening and intertia. > If done this way, I suspect that one could get very close to >the right index pulse spacing. >Dwight > > >_________________________________________________________________ >Windows Live?: Keep your life in sync. >http://windowslive.com/howitworks?ocid=TXT_TAGLM_WL_t1_allup_howitworks_022…

17 years, 4 months

FFS: CP/M Plus Guide

by silent700＠gmail.com

I've got a big pile of paper here (the binding is missing:) Digital Research CP/M Plus Version 3 OS User's Guide, Programmer's Guide and System Guide (all one book.) I'll send it out for the cost of shipping. It probably weighs a couple pounds. Preference given to someone who can scan it nicely and get it into one of the document archives out there. My sheet feeder has given up on feeding the 6"x9" paper. Or, if it already has been scanned and is out there somewhere, someone let me know. Then I won't feel bad recycling it. j -- silent700.blogspot.com Retrocomputing and collecting in the Chicago area: http://chiclassiccomp.org

17 years, 4 months

DECwriter correspondent LA12 operators manual

by pat＠computer-refuge.org

For anyone interested, I scanned a copy of the LA12's operators manual, which Tom Ponsford graciously loaned me, and have placed a copy here: http://computer-refuge.org/classiccmp/dec/la12/ Al, if you want to grab that or my TIFF copy for bitsavers, let me know and I can send it to you. It's 400dpi/1bpp and G4 compressed. Pat -- Purdue University Research Computing --- http://www.rcac.purdue.edu/ The Computer Refuge --- http://computer-refuge.org

17 years, 4 months

PDP-11 power requirements

by slawmaster＠gmail.com

I may soon be acquiring a PDP-11; I do not know the exact model. My question is, what kind of power supply might this require? It sounds like some can use 110V and others require 220? Are there models that I can just plug into my apartment's wall socket, or do I need to get an extension cord from the washer/dryer socket (which is not in use right now)? If anyone can summarize what models need what sort of power, I'd appreciate it. Thanks John -- "I've tried programming Ruby on Rails, following TechCrunch in my RSS reader, and drinking absinthe. It doesn't work. I'm going back to C, Hunter S. Thompson, and cheap whiskey." -- Ted Dziuba

17 years, 4 months

Anyone have a line on batteries for the NLS portable oscilloscope?

by ethan.dicks＠gmail.com

Hi, All, The topic of replacement batteries came up in the Yahoo Group for the RB5X, and someone posted a link for 2 volt 2.5 Amp-hour cells (which are apparently used in an older version of the robot than mine)... <http://www.batteryweb.com/hawkersla-detail.cfm?Model=0810-0004&label=single…> I saw the image and immediately thought of my NLS portable oscilloscope. I'd love to refurb mine, but $45 in batteries is a little on the high side for me. Has anyone on the list replaced a set of this sort of battery, and does anyone know of a place that stocks them for a bit less? -ethan

17 years, 4 months

Collection up date

by RodSmallwood＠mail.ediconsulting.co.uk

Hi all I had a super Xmas break and as a result The following have been restored to factory spec and are running. On TCP/IP network VAX 4000 M500 VAX 4000 M200 MicroVAX 3100 VAX Station 3100 Alpha 3000 Alpha Station 200 Stand alone Rainbow 100+ Needs a DECnet adapter 11C23 Running Micro RSX needs the DECNet board (which I do have) and the Cable which I don't. Decmate III Working Periperals VT200's VT320's VT240 Awaiting Parts/Attention PDP 8e - Has a difficult to trace hardware problem It was running but now I can't toggle in a test proigram. Set address -> DEP -> Set Data - > DEP (Increments the address ok) Go back and examine memory = nothing. System has four x 4K core memory. Removing any one or three out of four makes no difference. I'm rusty on PDP8's ( I last worked on one in 1972) Help!!!!!!!!!!!!! VAX 4000 M300 (Needs the upper outer door and the door for the front of the CPU compartment PRO 350 Needs a RD-5X MF ST506 Drive PRO 380 Needs a RD-5X MF ST506 Drive VT 103 (Needs a monitor board) PDP-11/94 (Needs KDJ11-EB = M8981-BA) Wish List DEC logo colour monitors of any type. VAX VLC's 11/05 11/10 11/34 11/70 RL01's VT100's VT102 VT4XX LA36 LA180 BA123 (Enclosure) BA23 (Enclosure) 11X94-E (Enclosure) Rod Smallwood

17 years, 4 months

Some Microtek MICE documentation

by aek＠bitsavers.org

Almost nothing was out there for the low cost ICE's that Microtek built, so I scanned and took some pictures of the bits that I have. Additional personality docs (esp for the MICE-II 6502 and 6809) would be nice to find. Still need to take some pics of the original 6502 MICE that I have. http://bitsavers.org/pdf/microtek/mice

17 years, 4 months

PDP-11 power requirements

by tiggerlasv＠aim.com

I can't speak towards the older, larger Unibus models, such as the 11/45, 11/55, 11/60, and 11/70. However, these models generally had a standard 115volt line cord: 11/02 11/03 11/23 11/23+ 11/24 11/34 11/34a 11/44 11/53 11/73 11/83 11/84 11/93 11/94 (Sorry in advance, if I left anyone's model off the list.) ;-) If it's in a rack, it MAY have a power distribution module at the base, with a 20-amp or 30-amp power cord, but in most (if not all) cases, the individual chassis inside the rack will have standard 115volt line cords that plug into it. T

17 years, 4 months

S-100 backplane board spacing

by aek＠bitsavers.org

> does anybody have a handle on where I > could obtain 5 S100 edge connector sockets? You also need to specify the spacing of the circuit and component side pins on the connector for your backplane. There are at least two different spacings that were used. Most were the wider style, early MITS backplanes had closer spacing.

17 years, 4 months

S-100 backplane board spacing

by ajp166＠bellatlantic.net

> >Subject: S-100 backplane board spacing > From: "Andrew Lynch" <lynchaj at yahoo.com> > Date: Thu, 05 Feb 2009 22:32:10 -0500 > To: <cctalk at classiccmp.org> > >Hi! Is there any sort of a standard for S-100 backplane spacing? > >I measured a couple of backplanes I have (a VG and another one) and they >both measured .375" (3/8") gap between the connectors. That seems rather >closely spaced to me if the boards are 3/4" apart if the connectors are 3/8" >wide themselves. > >What would be the minimum useful gap between S-100 connectors for a small >hobbyist S-100 backplane? I presume 3/8" gap is not enough if you want to >accept prototype boards with wire wrap sockets and maintain some clearance. There are two considerations, airflow and bus length. Wider gap helps airflow to a point then wider doesnt help as much. Wider spacing makes the bus longer for a give number of connectors and longer has more problems with reflections(ringing) and other transmission line behavours. Longer may also impact power distribution as well. Last items is the height of boards limits how close or forces skipping slots. Some fo the taller boards in my collection suggest greater than 0.75" center to center would barely be adaquate because of tall heatsinks contacking the next board. Look at the better backplanes, Compupro would be one. Also the later boards (more modern) were dense enough that only a few slots are required. I have at least two machines that are: Zpu-B z80 cpu 64K ram (ram 16, 17 or 22) Interfacer (multi serial plus parallel) DISK1A FDC DISK3 HDC Systemm Support Thats only 6 boards and the smallest backplane I have is 8 slots. It's as loaded a system as most or more so. The limiting factor for the box is fans, power supply and mountings for the disks. Older antiques like an altair filled with then current board may have: CPU 8080or later Z80 Ram boards anhywhere from 4k per to 16K per (as many as 8 for 64K) Some form of rom boot card possible a dual board FDC (altair disk was a two card set) multiple IO baord for serial possible multiple boards for one or more printers or other parallel devices. And cooling issues. Hope that helps with some history. I'd say 6-8 slots spaced 1" and also on the board terminator. Allison > >Any constructive thoughts on the subject much appreciated. > >Thanks and have a nice day! > >Andrew Lynch

17 years, 4 months

Simulation vs breadboarding (was Replacing failed powersupplies on qbus PDP-11s)

by aek＠bitsavers.org

> Aquarius project? A mostly accurate description can be found in http://lowendmac.com/orchard/06/john-sculley-years-apple.html

17 years, 4 months

Need a copy of an IRE article

by evan＠snarc.net

Can anyone assist me in getting a copy (pdf preferred) of this article: Proceedings of the IRE, Oct. 1953 (Vol. 41, Issue 10), pages 1388-1392. The article is called. "The Design of Logical OR-AND-OR Pyramids for Digital Computers" ... thanks! - Evan

17 years, 4 months

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