test-drb

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101090 discussions

by rtellason＠verizon.net

A part of my salvaging has me with these odd little jumpers, where the pins are not on the board but on the jumper. Since the "sockets" that these plugged into were not salvageable, and since I don't (as far as I know) have anything that uses these, they're superfluous to my needs. I haven't counted them, but if any of you guys have a need for some of these feel free to contact me off-list, I'm sure it wouldn't take much postage to get a few in an envelope... -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, a critter that can be killed but can't be tamed. --Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin

19 years, 9 months

VCF 9.0 hotel room block now available

by sellam＠vintagetech.com

I've established a hotel room block for VCF 9.0: http://www.vintage.org/2006/main/lodging.php Room rate is $99. They have very nice rooms with excellent amenities. I'm working on another block at another local hotel at a lower rate ($79) with similar amenities. Will update as soon as it's confirmed. -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org [ Old computing resources for business || Buy/Sell/Trade Vintage Computers ] [ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]

19 years, 9 months

Several IBM PC/RTs and peripherals available

by lbickley＠bickleywest.com

I was just contacted by a vendor who says he has the following available: 6 tower units IBM PC/RT (model #6150), with keyboard/mouse and monitors, plus several boxes of peripherals, CPU, FPU and other interface cards, several boxes of ESDI hard disks (several new, in box), and many boxes of software and manuals. If you are interested in this lot, please email me privately with an offer and I'll pass in on to the vendor. Cheers, Lyle -- Lyle Bickley Bickley Consulting West Inc. Mountain View, CA http://bickleywest.com "Black holes are where God is dividing by zero"

19 years, 9 months

Odd external Amiga floppy drive

by aliensrcooluk＠yahoo.co.uk

--- Jules Richardson <julesrichardsonuk at yahoo.co.uk > wrote: > Teo Zenios wrote: > > I got an ebay find in the mail today, an externa l > floppy drive with a > > port for another floppy. The odd thing about th is > drive is that the cable > > going to it is 25 pin while the connector on th e > back for an additional > > drive is the normal 23 pin variety. > > That is odd. Did anything other than an external > floppy drive ever use the > Amiga's floppy connector? If so, I wonder if they > did it that way because the > 25-way connector saved a bit of money, but they > still wanted to present a > 23-way connector to the 'outside world' for > compatibility. Actually, didn't > the Amiga support four floppy drives anyway, so > maybe the 23-way is there for > plugging in additional drives from other vendors.. . > >> snip << > > cheers > > Jules > I don't think anything else used the external floppy connector. The Vidi Amiga (capture TV/video i mage on the Amiga), Turbo Sound whatsit (I forget it's name but does the same as Vidi Amiga, but for sound) and the hand scanner I have all used the serial or parallel port to connect to my Amiga. Yes, you can connect 3 external disk drives. The drives are known as DF0: (internal) and DF1: to DF3: (external) by the system. You can also (theoretically) have 4 harddrives connected aswell, or (like I have) one large one split into 4 partitions. Known as DH0: to DH3: unless you leave them unmodified (like I had) in which case they will be known as TDH0: to TDH3: Regards, Andrew B aliensrcooluk at yahoo.co.uk

19 years, 9 months

Anyone interested in this job lot (West Yorkshire, UK)?

by aek＠bitsavers.org

> Various old media (including some hard-sectored 8" floppes which I > think belong to something Tektronix) It would be nice if someone could save these.

19 years, 9 months

Odd external Amiga floppy drive

by teoz＠neo.rr.com

I got an ebay find in the mail today, an external floppy drive with a port for another floppy. The odd thing about this drive is that the cable going to it is 25 pin while the connector on the back for an additional drive is the normal 23 pin variety. I opened the case up and found a Citizen OSDC-45C drive which I believe is a 720K DD drive along with a circuit board populated with a cap, some other small caps, and 2 chips (Tesla MH7438 and HD 74LS74AP OL15). My original idea was to swap out the 720K drive and install a 1.44MB PC one for a Planar Cleanscreen 486 LCD system I have (plus do some rewiring as needed), but I wonder what this drive is actually for. Any ideas?

19 years, 9 months

cctalk Digest, Vol 37, Issue 34

by joachim.thiemann＠gmail.com

> > From: "Teo Zenios" <teoz at neo.rr.com> > To: "General Discussion: On-Topic and Off-Topic Posts" < > cctalk at classiccmp.org> > Date: Thu, 14 Sep 2006 21:24:08 -0400 > Subject: Odd external Amiga floppy drive > I got an ebay find in the mail today, an external floppy drive with a port > for another floppy. The odd thing about this drive is that the cable going > to it is 25 pin while the connector on the back for an additional drive is > the normal 23 pin variety. > > I opened the case up and found a Citizen OSDC-45C drive which I believe is > a 720K DD drive along with a circuit board populated with a cap, some other > small caps, and 2 chips (Tesla MH7438 and HD 74LS74AP OL15). > > My original idea was to swap out the 720K drive and install a 1.44MB PC > one for a Planar Cleanscreen 486 LCD system I have (plus do some rewiring as > needed), but I wonder what this drive is actually for. > > Any ideas? Ummm, is it for an Amiga? It may be a third-party amiga drive (can you post a picture, maybe - a link to the orig. Epay auction would do if it has a picture). Regular floppy drives could be used on the Amiga floppy port with the addition of a latch (which is what the extra circuit board contains). (I think the original Amiga external floppy drives (A1010) had a modified drive thus not needing the extra latch) Is the cable going to it really 25 pins? It was common for Amiga floppy drives to be chainable (thus all connectors 23 pin), so you could have up to 4 drives total. Joe.

19 years, 9 months

Disk drive 50 years old today (305 RAMAC)

by dave06a＠dunfield.com

Today is the 50th anniversary of the IBM 305 RAMAC - listed at the link below as the first computer system that had a disk drive. http://www.cedmagic.com/history/ibm-305-ramac.html -- dave06a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Collector of vintage computing equipment: http://www.classiccmp.org/dunfield/index.html

19 years, 9 months

Losing Your Memories

by Billy.Pettit＠wdc.com

Interesting article in yesterday's LA Times about fading bits and software. I think many of you, especially software archivists, would find it on topic and interesting. Billy http://www.latimes.com/news/nationworld/columnone/la-fi-archive13sep13,1,109 2621.story?coll=la-headlines-columnone&ctrack=1&cset=true

19 years, 9 months

Teletype lubrication advice

by pete＠dunnington.plus.com

I'm going to be using my 33ASR at what now seems to be an annual classic hardware exhibition for Computer Science at York, so a spot of preventive maintenance seems to be in order. I have Vol.1 and Vol.2 of "Bulletin 310B", Technical Manual. Vol.1 is installation, disassembly/reassembly, lubrication, theory of operation; Vol.2 is adjustment information (Is there a parts manual anywhere? I'd like a copy of that...) It says to lubricate the motor bearings at each end. But mine doesn't look like it was designed for that. It's a standard (for the UK) Teletype motor part no. 182267 (115V 50Hz). Are these meant to be "sealed for life" or is there some way to oil them that I've not spotted? I'd like to get a new typehead. Mine has suffered from apparently being used after the rubber hammer cap went gooey and fell off. It now has a thin self-adhesive rubber foot of about the correct thickness installed, but some of the characters were already damaged. -- Pete Peter Turnbull Network Manager University of York

19 years, 9 months

VCF UK (was:Re: Vintage Computer Festival 9.0)

by stimpy.u.idiot＠gmail.com

I've changed the subject line to see if it grabs anyone's attention :) Anyone in the UK have experience of setting up a similar idea? I know people > on the Sinclair QL mailing list who put up yearly bashes in church halls > and No experience at all - though I'd also be happy to help. It strikes me that having someone on board who's done similar size events would be a big advantage. Can anyone comment on how much effort and how many bodies it's taken to organize a small(ish) event like this? >Of course, the perfect venue, history wise, would be H Block at Bletchley >Park - the home of the WWII codebreaking Colossus machines and the world's >first purpose-built computer building but its availability is still in >question..... What about Science & Industry museum in Manchester? They've got some early Manchester Uni hardware, haven't they? -- Pete Edwards "Prediction is very difficult, especially if it's about the future" - Niels Bohr > >

19 years, 9 months

VCF UK

by Billy.Pettit＠wdc.com

David Cantrell <david at cantrell.org.uk> wrote: Various 8-bit groups have done this too, although most are now so small that they can't. FWIW, the remnants of WACCI, an Amstrad CPC group that put on a few such events, are having a pub meet in London on the 18th of November (see recent announcement in comp.sys.amstrad.8bit). Even if none of the old organisers turn up, CC and VCFers are most welcome to join us for beer :-) Model railway clubs would probably be good places to look for expertise in running similar events, as many of them hold a yearly exhibition. Typical venues are church halls, schools, and (out of season) non-league or low-division football clubs. I expect there's quite a large cross-over between vintage computing and railway modelling too, which helps a lot - lots of them use BBCs for their control systems. David Cantrell | Hero of the Information Age There are many different types of sausages. The best are from the north of England. The wurst are from Germany. -- seen in alt.2eggs... ----------------------------------------------------------------------- Some of the better prepared and displayed shows that I remember are the Meccano exhibitions and the traction engine groups. Some of their members had been doing this for 30-40 years. Bet they could offer a lot of help and advice. Your sig file sounds like an old Goon show gag. Billy

19 years, 9 months

C64 ASM?

by healyzh＠aracnet.com

What do people recommend for an Assembler on the Commodore 64? I'm wanting to play around with one, and am not sure what to use. I downloaded "Turbo Macro Pro '05", but have yet to figure it out how to actually do anything with it. As I understand it, I'm supposed to start it with the following: LOAD"TMP 1.1/S.",8 SYS 8*4096 Or instead of the SYS command I can use the Fastload cart to jump to $8000. However, in both cases, I get the same result, a READY prompt, and seem to still be in BASIC. Zane

19 years, 9 months

HP9816

by ard＠p850ug1.demon.co.uk

I've just bought a partially defective HP9816 (aka HP9000 model 216) on E-bay. Let me emphasise from the start that the seller declared the problems in the E-bay listing, so I am certainly not complaining. Anyway. one problem is that the power-on diagnostics mention an 'Alpha Video' failure, and then give a memory address/data failure message. I think the address is in the text video RAM area (it would be on a 9826 or 9836), so I suspect one of the 2K SRAM chips on the text PCB (the larger one standing up next to the CRT). I will do some more tests. Another problem is that I am missing a keycap, I think it's the left hand shift key. I have the small, compact keyboard. So a couple of questions. 1) Does anyone have a 'junker' keyboard that I could buy a keycap from. Or any ideas as to making one 2) Does anyone have the service manual (or is there a scanner version on the web, Google found nothing, and I couldn't find it on the usual sites [1]). Yes,. I know it'll be a boardswapper guide, but I might was well read it if it's available. [1]. What's up with http://www.hpmuseum.net? I get all sorts of 'SQL errors' when I look at the doucmentation index, and most of the manuals are no longer available :-( -tony

19 years, 9 months

Fixed that HP9816 (!)

by ard＠p850ug1.demon.co.uk

I've had another look at that 9816... The error message seemed to say that bit 12 of the video RAM was stuck low. Anyway, I removed the text and graphics boards, the monitor PCB (which carries the connectors these plug into) and the backplane. Then, since I know the DIO slot pinout, I could trace data line 12 from a DIO slot to the text PCB socket. And then on the text PCB I traced it to one side of a '245 buffer. And from the other side to a data pin on U7 -- one of the 2K SRAM chips. I desoldered U7 and raided my junk box for a replacement. Soldered it in and put the machine back together. And amazingly no more error messages. I only got the machine today, and have no documentation at all. Hmm -tony

19 years, 9 months

Update on KS/NE Trips

by jrkeys＠concentric.net

Just a short note to say that the trip was a great success and seeing two SDS 910's and a SDS 920 plus all the related items in one place (a home) was something. I only got one of the SDS 910's plus 4 tape drives and other stuff. The SEL810A was great also and I still have not been able to get it off the truck (this is the third day). I will post a list later in the week after I get everything off and some rest. More later John (Still need funds for GA rescue).

19 years, 9 months

XGameStation Pico Edition Workshop @ VCF 9.0

by sellam＠vintagetech.com

Build Your Own Video Game Console! XGameStation Pico Edition Workshop at the Vintage Computer Festival November 5, 2006 http://www.vintage.org/2006/main/workshop.php The VCF is proud to present the first Build-It-Yourself experience at VCF 9.0 this November 5. The Build-It-Yourself workshops are a great introduction for those interested in learning the art of computers, programming and electronics and who wish to get first-hand experience building and programming their own hardware under the direction of leading experts in the field. Workshop Description The first announced workshop will be conducted by world famous video game designer, programmer and author Andre' LaMothe. Andre' has nearly 30 years of computer programming experience and holds degrees in mathematics, computer science, and electrical engineering. He is the world's best selling game development book author. Andre' founded and operates Nurve Networks LLC, a company that develops and markets video game hardware kits that enable one to build and program a console video game system from scratch. Nurve products include the XGameStation Micro and Pico Editions as well as the forthcoming Hydra Console. The workshop Andre' will conduct at VCF 9.0 will focus on the XGameStation Pico Edition. The XGS Pico Edition kit is a simplified version of the XGS Micro Edition, with an Ubicom SX28 "Super-PIC" running at 80 MHz at its core. For complete technical specifications, visit the XGS Pico Edition product page: http://www.xgamestation.com/view_product.php?id=29 Pre-Requisites and Tools Those wishing to attend this workshop should have a minimal level of soldering skill. Participants should bring their favorite soldering iron and solder, a multimeter, and some simple tools such as dykes. Optional tools include a laptop with a standard serial port and an SX key (also available from Nurve Networks). Everything else that is required for the workshop will be provided, including video displays and cables, power supplies, etc. Andre' will take the students through a step-by-step build-out of the game hardware using on-screen visuals. At the end of the class, each participant will have a working XGS Pico Edition game system ready for programming. The entire workshop will run for approximately two hours. Registration The fee for this workshop is $75.00, which includes the XGS Pico Edition Kit. To reserve your spot, go to the weblink provided below and follow the ordering instructions. Fees must be paid in advance of the course by October 29, 2006. http://www.vintage.org/2006/main/workshop.php?action=select&id=VCF90XGSPEW Inquiries regarding this workshop should be directed by e-mail to <workshop at vintage.org>.

19 years, 9 months

network cards

by rtellason＠verizon.net

While consolidating network cards into one box, I came across a couple I have no use for. One is an IBM Token Ring Card, they have a copyright notice on one of the chips and the center of the card is occupied by one of those square aluminum thingies that they're so fond of -- on the metal bracket with the connectors is a little paper sticker saying "16/4". The other is an SMC ARCnet card. I have no intentions of ever doing anything with either of these, so if you can use them please feel free to contact me offlist. -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, a critter that can be killed but can't be tamed. --Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin

19 years, 9 months

SN94281

by PLM3128＠aol.com

I am interested in the SN94281 do you still have and if so email me the price. Paul Moldenhauer email: _plm3128 at aol.com_ (mailto:plm3128 at aol.com) . thank you

19 years, 9 months

Need microprocessor trainer, oscilloscope advice?

by Billy.Pettit＠wdc.com

Dave McGuire wrote: On Sep 11, 2006, at 7:23 PM, Chuck Guzis wrote: >> Maybe, but there is one heck of a difference between working on an >> emulator and using (and modifying, interfacing, etc) the real >> hardware. >> And the OP wants to learn about hardware, I believe. > > Why not start with a "mostly on one chip" type of setup, say a Z8 or > 8051 > and work from there? There are plenty of small circuits published > using > them and, as the student's knowledge grows, other bits can be added on. This is a good idea. One can put together, using wire-wrap or point-to-point soldering, an 8752-based machine in an hour or two. Five chips, only one of which is a 40-pinner. Burn a copy of the well-known 8052AH-BASIC into it and you've got yourself quite a neat little machine. The BASIC interpreter has excellent I/O capability, interrupt support, and even floating-point math. If anyone wants to do this but lacks the stuff, I have 8752 chips and the means to program them. And the BASIC interpreter, of course. -Dave I agree with dave. But would add that some of the smaller PIC devices are also easy to work with and cheap. And there are several one line tutorials, as well as lots of supporting literature. Buy a couple of issues of Nuts and Volts to get started. And for a beginner, there is a nice book "Programmable Logic" that takes you through several of the basic I/O devices using simple logic interfaces, to demonstrate how easy they are to use and understand. I just found one on eBay for 99 cents, worth the price for getting started. Much more expensive, but Elektor did an outstanding beginners book on computers. Still available, but by time you import it, you're looking at $50 +. Billy

19 years, 9 months

Faulty keyboard on an Amstrad CPC 6128.

by austin＠ozpass.co.uk

A cheeky second post requesting assistance... I picked up an Amstrad CPC6128 today from an eBay auction. It is complete and came with a whole bunch of software. Unfortunately the keyboard has a few faulty keys and the 2? disk drive makes horrible grinding noises when I try to access a disk. Does anybody on the list have any experience of servicing these computers to give me some pointers before I tear it down? -Austin.

19 years, 9 months

Assistance required with an Acorn A3000, IDE Hard Disk

by austin＠ozpass.co.uk

Hello! Can anyone help me (off list, if necessary) with formatting an IDE hard disc, using a Castle Technologies IDE mini podule in an Acorn A3000 upgraded to RISCOS 3.11? Any advice gratefully received. TIA. Austin.

19 years, 9 months

13W3 adapters

by THX1138＠dakotacom.net

Hi, I need to make a 13W3 "extension cord" -- M-F *not* the M-M (or F-F, depending on how you look at it!) cables that Sun offered. I salvaged a sufficiently long video cable off of a <mumblemumble> Sun monitor -- so that gives me *one* end (and, one *sex*). The *other* sex is a bit more elusive (i.e. the gender that is present *on* the actual CPU). But, I found a <random> 13W3<->3BNC adapter in one of my goodie boxes. The 13W3 connector is "just right" (sex, form factor, mounting, etc.). So, the issue (and hence the question!) is: what sort of device might *want* this adapter (i.e. why should I *keep* it and not just salvage parts from it)? Note that the BNC pigtails are only a few inches long so I assume this would be attached to a 3BNC monitor and a "regular" Sun cable used to tether that to the CPU. Thanks! --don

19 years, 9 months

bad keys on terminals

by ajp166＠bellatlantic.net

> >Subject: Re: bad keys on terminals > From: "Dave Dunfield" <dave06a at dunfield.com> > Date: Tue, 12 Sep 2006 05:31:07 -0500 > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > > >Dave > >BTW: I have similar vintage PETs with identical keyboards in >which the conductive rubber is fine ... anyone know what >conditions accelerate the deterioration of conductive rubber? > Ozone and other airborne contaminants. I have a old (30 years old) peice of black conductive foam that is stored in a large jar with cmos parts and some dessicant is in perfect condition. A peice >from the same block exposed to the air died (crumbled) over 15 years ago. I've also had several keyboards with foam backed pads (Cherry?) die on me. Same problem, either the glue dies or the foam. Allison

19 years, 9 months

CompuPro floppy controller differences

by ajp166＠bellatlantic.net

> >Subject: RE: CompuPro floppy controller differences > From: "Chuck Guzis" <cclist at sydex.com> > Date: Mon, 11 Sep 2006 09:19:56 -0700 > To: cctalk at classiccmp.org > >On 9/11/2006 at 8:02 AM Allison wrote: > >>The manual says two tracks on 8" and 3 tracks on 5.25 with track 00 being >>128 byte single density only. NOTE the manual says tracks not cylinders. > >All I can relate to you is the number of cylinders before the directory. >What CCS uses the extras for is anyone's guess. My 8" CCS sample is DS MFM >and reserves 4 cylinders for boot. > >Cheers, >Chuck Interesting, I have both SSSD, SSDD and DSDD media for my CCS system and none exceed 2 tracks for 8". I have no 5.25" so I cant speak for those. The DSDD media I have uses the first two tracks of side 2 for data and the organization if 2 tracks side 1 reserved and the next 75 tracks are data wrapping around to side 2 (77tracks). The software is as supplied from CCS to format that media. I wonder if CCS did a change or switch gears on their format? I do know it reads SSSD CP/M standard without issues. My CCS system is 2200 crate with 2501 backplane, 2810 Z80 cpu, 2710 4 port serial, 2704 bus terminator and 2422 FDC. The only non CCS part is the Compupro Ram16. It's a really nice system, well documented and very complete software when I got it. I was used for a development platform for another CP/M system. The most recent date code on anything in the crate is early 1981 so I figure it's from around then. I don't know if this is an early version or later. Allison

19 years, 9 months

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test-drb