On 06/08/2017 01:08 AM, Christian Corti via cctalk wrote:
>
> I got two ECS modules, I put pictures of them on my FB album. I've also
> put them on our server right now, at
> ftp://computermuseum.informatik.uni-stuttgart.de/cdc/ecs/
>
> The core planes are *huge*, about 4000cm² !
Thanks for tha
On 06/08/2017 09:42 AM, Paul Koning via cctalk wrote:
> For blowing, canned air or dry nitrogen or the like is best.
> Breathing is not such a good idea. Air from a compressor may be ok
> if the compressor is oil-less (airbrush type), but workshop piston
> compressors put oil in the air and you d
On 06/12/2017 10:23 PM, jim stephens via cctalk wrote:
> Things odd about the board. No 1488 / 1489 or any other transmit /
> receiver chips. No clock circuit. Was there an appropriate
> frequency crystal or clock on the interface to divide to something
> for the 1602 uart clock?
>
> I see
On 06/13/2017 02:26 PM, Eric Smith wrote:
> On Tue, Jun 13, 2017 at 12:39 AM, Chuck Guzis via cctalk
> A person might think so, but as DEC found out with the PDP-11/05
> console serial port, it's really not. The percentage tolerance of
> async serial is not any higher at low
On 06/13/2017 05:29 PM, Eric Smith wrote:
> It's mathematically impossible for a normal UART [*] to handle 49%
> timing error. The cumulative timebase error by the end of a
> character can't be more than one bit time, or the wrong bit will get
> sampled, resulting in incorrect data, or, (if that
On 06/13/2017 06:27 PM, Eric Smith wrote:
> They sold it, then spent a bunch of money on Field Service trips to make
> it work for customers. It cost them enough to justify multiple
> redesigns, including (finally) switching to a crystal.
The TRS-80 board? Do you have any documentation on Field
I'll also grant that there's a big difference between driving one or two
meters of cable and one or two hundred meters with TIS232 levels.
--Chuck
On 06/16/2017 02:40 PM, Ed via cctalk wrote:
> don't think it is any GE 100 200 400 or 600 series. nor any of
> the early process control computers either. Ed# _www.smecc.org_
> (http://www.smecc.org)
Perhaps not a computer, but a controller? I'm thinking of things of
that time like the Westi
On 06/16/2017 07:09 PM, Jon Elson wrote:
> Oh, GE made NC controls (not CNC) all hardwired logic to decode
> G-code commands on paper tape and make a machine move. They had
> hundreds of boards, but I seem to recall single-sided yellow
> paper-phenolic boards. I also thought they used card-edge c
On 06/18/2017 10:59 AM, Vincent Slyngstad via cctalk wrote:
> From: Aaron Jackson via cctech: Saturday, June 17, 2017 2:14 AM
>> Can anyone suggest a source of replacement indicator bulbs for an
>> RL02 drive? Are they fairly standard?
>
> The correct bulb is the GE-73, a fairly common bulb:
> ht
On 06/22/2017 01:27 PM, Mike Loewen via cctalk wrote:
>
> I was contacted by a faculty member at the University of Alabama
> (Tuscaloosa) who is looking for help in recovering files from some
> 5-1/4" diskettes. The diskettes are from the 1989-1892 time frame...
An eyewitness account of the Se
On 06/22/2017 01:27 PM, Mike Loewen via cctalk wrote:
>
> I was contacted by a faculty member at the University of Alabama
> (Tuscaloosa) who is looking for help in recovering files from some
> 5-1/4" diskettes. The diskettes are from the 1989-1892 time frame...
An eyewitness account of the Se
On 06/22/2017 07:18 PM, Fred Cisin wrote:
>>> I was contacted by a faculty member at the University of Alabama
>>> (Tuscaloosa) who is looking for help in recovering files from
>>> some 5-1/4" diskettes. The diskettes are from the 1989-1892 time
>>> frame...
>
> That was all before my time, so
On 06/22/2017 09:48 PM, Mike Loewen via cctalk wrote:
> On Thu, 22 Jun 2017, Sam O'nella wrote:
>
>> The assumptions pouring in could use a quick follow up. Date joke
>> aside, did they already try reading them? My guess would be yes
>> hence the recovery request possibly needing flux or more adv
On 06/23/2017 09:23 AM, Fred Cisin via cctalk wrote:
> Some folk might come up with shortcuts that seem quicker, but
> unless/until they do the transfer, . . .
If it's a P1 or later system, don't forget USB pen drive.There are
even DOS drivers available for that functionality.
I think that m
On 06/23/2017 10:53 AM, Fred Cisin via cctalk wrote:
> On Fri, 23 Jun 2017, Chuck Guzis via cctalk wrote:
>> If it's a P1 or later system, don't forget USB pen drive.There
>> are even DOS drivers available for that functionality.
>
> Since Ed said Win95, I chos
Don't bother opening it, it's spam.
--Chuck
On 06/23/2017 04:38 PM, steve via cctalk wrote:
> Yo!
>
> I've come across that stuff accidentally, it is just awesome! Just give it a
> try http://bit.do/dxbM2
>
>
> Take care, steve
>
>
>
> From: General Discussion On-Topic and Off-Topic Po
On 06/24/2017 01:37 PM, Fred Cisin via cctalk wrote:
> There was a bracket with a DC-37. That could be used for PC external
> drive, if that was what you had on hand. Or wanted to connect an 8"
There was also the MCA Diskette Adapter/A, which didn't work with much
"low level" software.
--Chuck
On 06/25/2017 09:24 AM, Rob Jarratt via cctalk wrote:
> Thanks Pete, so there is enough of a chance that I have found the
> culprit to make it worth the effort of desoldering it.
>
> I have been wondering for a while about getting a hot air rework
> station. There are lots of cheap Chinese ones o
On 06/25/2017 11:41 AM, Rob Jarratt wrote:
> Thanks Chuck, I had seen some mention of Chip Quik. You say soldering a new
> part is straightforward, but I am not clear how that works, is the solder
> left behind on the pads so you just heat the pins?
As mentioned, I use the toothbrush to scrub t
On 07/01/2017 09:28 AM, Jules Richardson via cctalk wrote:
> Google suggests that they might be 7/32", but I'm not sure; that's less
> of a common size (vs. 3/16" or 1/4", say) - I'm not even sure I could
> find a driver like that around here.
That's exactly what I use--get a decent one; some of
On 07/01/2017 01:23 PM, Jules Richardson via cctalk wrote:
> It does look like I can get a 7/32" socket for a couple of bucks, though
> - so maybe I'll go that route for now and just shave it down a little
> with the bench grinder. It can live on the shelf with the homebrew Mac
> case dismantling
On 07/01/2017 10:27 PM, Tony Duell via cctalk wrote:
> I was told years ago that in general the thinner-wall sockets are better
> quality -- they have to be made from stronger steel alloy to work at
> all. Obviously there are exceptions
It wouldn't surprise me if some of the cheaper stuff was
On 07/02/2017 09:45 AM, Chris Pye wrote:
> Chuck, dare may I ask what you were doing with electricians pliers that close
> to a pneumatic cylinder?
It was on a test-bench setup. Part of my job back then was calibrating
the stroke of cylinders to the 3-15 psi control signal. Plant air
(power s
On 07/02/2017 07:36 AM, Chris Elmquist via cctalk wrote:
> I'm a little late to this thread but I didn't see anyone mention the Wiha
> brand which also have a slim Nut Driver set with a 7/32" bit in the kit.
> When I was refurbing a couple model M here, I invested in this Wiha set,
I've got a few
On 07/02/2017 10:56 AM, william degnan via cctalk wrote:
> Have you also experimented with diskettes using this technique. May apply
> in some cases.
Haven't we been here before, oh, about 2-3 years ago? I bake just about
every bit old old media I get in, nowadays with very good success. I
thin
On 07/02/2017 11:34 AM, Warner Losh via cctalk wrote:
> What's the theory behind baking floppies? For tapes it makes sense to help
> with self-adhesion, but what's the benefit to single surfaced media that
> doesn't overlap?
The audio tape guys pretty much took the lead on this one, probably
beca
On 07/02/2017 01:29 PM, Rob Jarratt wrote:
> That I don't know. I bought a small oven thermometer to check first,
> which I grant is not very accurate or fast, but it didn't seem to
> vary much. I also found some suggestions that fan ovens are a bit
> more consistent, but have no real proof of cou
On 07/02/2017 01:33 PM, Fred Cisin via cctalk wrote:
> But Sears got SO bad for a while that in my Honda book I said, "better
> to have a few good tools . . . than a lifetime supply of scrap metal
> tools, ready and waiting to hurt you." (p 236)
I recently had the retainer ball (that holds socke
On 07/02/2017 11:34 AM, Warner Losh via cctalk wrote:
> What's the theory behind baking floppies? For tapes it makes sense to
> help with self-adhesion, but what's the benefit to single surfaced
> media that doesn't overlap?
I'll add one more type of failure to the list--where the binder bleeds
On 07/05/2017 01:42 PM, Rob Jarratt via cctalk wrote:
> I bought some ChipQuik recently and managed to successfully remove a 74LS125
> with little trouble. Today I have come to trying to desolder another similar
> sized chip, but try as I might I just cannot get it to work. The ChipQuik
> just ball
On 07/06/2017 09:58 AM, Mark J. Blair via cctalk wrote:
> Can the cyclomethicone be used to help address sticky shed on a tape?
> If it evaporates too quickly to apply it to an entire tape before
> reading, then perhaps by placing a wiper in the tape path to apply it
> during reading would work?
T
On 07/06/2017 11:09 AM, Mark J. Blair via cctalk wrote:
> Did you apply it to the whole tape prior to reading it, or did you apply it
> in place on the tape drive while reading the tape?
The whole tape--I ran my tape cleaner at low speed and used a strip of
1/2" thick synthetic felt glued to a l
On 07/06/2017 11:35 AM, Mark J. Blair via cctalk wrote:
> I don't have a tape cleaner. Maybe I should make one. In particular, for
> those damned TK50 tapes!
They do show up occasionally on eBay. Mine was NOS from a government
surplus auction. Complete but for the bottle of Freon TF, but I can
On 07/06/2017 11:43 AM, Paul Koning via cctalk wrote:
> EBCDIC is easy, just grab an IBM Green Card. I'd recomment not using
> a translation if possible, since translations are likely to be lossy.
> There are EBCDIC characters that have no ASCII analog.
All else being equal, I'd agree--but you c
On 07/06/2017 12:41 PM, Ethan Dicks wrote:
> I got it from the Box link. Thanks!
If anyone's running Hercules or some other uses-EBCDIC emulator, here's
the link to the .tap image file.
https://app.box.com/s/8rxbihjjnw5zdkesym4cjwqswekufagh
--Chuck
You know, I do a fair amount of this stuff. The confidential/secret
stuff I keep that way (e.g. 100 tapes that I'm doing for NASA this
summer), but there's also a fair amount of public stuff that I do have
permission to share. I've done the hard work in translating the data
to something recogniz
On 07/06/2017 03:57 PM, Rob Jarratt via cctalk wrote:
11/730.
>
> I long to hear again the sound of the line printer that was attached
> to the DECSYSTEM-20 I used to use. I think it was a drum printer but
> I don't know the model (I may have some materials around that mention
> the model, not su
On 07/06/2017 10:42 PM, Dave Wade wrote:
> Sadly I don't think that’s much use on Hercules as it needs an AWS or HET
> file. Is there a format converter any where?
Dunno, but it should be pretty simple. TAP is discussed with the SIMH
documentation and the AWS format is discussed here:
http://w
On 07/07/2017 08:25 AM, Dave Wade wrote:
> The header is six bytes long. Two are the length of the current
> block. Two of the bytes are the length of the previous block, so you
> can do read backwards, two of the bytes contain flag bits. One of the
> flags says this chunk is the first part of a
On 07/07/2017 10:26 AM, Al Kossow via cctalk wrote:
> I stopped beating that horse years ago. They also assume that all of the data
> blocks read correctly, they don't save the error correction data if the block
> had it, etc etc.
>
> Need to update my reader anyway soon, so I'm going to append s
On 07/07/2017 12:17 PM, Al Kossow via cctalk wrote:
> I'm much less hopeful on any other parallel tape formats, since there
> are so few and the desire to recover any of that has been low.
It brings up another aspect. I've done a batch of tapes that had
nothing more that the originator's name a
On 07/07/2017 12:04 PM, Al Kossow via cctalk wrote:
>
> The way JBI did it was to digitize the capstan encoder as a clock
> reference for tape motion obliquely referenced in
> http://storageconference.us/2008/presentations/3.Wednesday/5.Bordynuik.pdf
They mention a 36-track tape head. Were thos
On 07/07/2017 12:46 PM, Al Kossow via cctalk wrote:
> It is literally "you can't save everything, where would you put it?"
>
> You can be completely buried by piles of unknown data on magnetic
> media.
And yet, I'll venture that it's a pretty safe bet that all of the data
recorded between 1955-19
Hi Gang,
I just got another batch of tapes. While the customer specified 9
track, there are a bunch of 7 track/556 bpi tapes in the mix.
Anyone have a drive that they're willing to part with/loan for these things?
Thanks,
Chuck
On 07/07/2017 04:39 PM, Al Kossow via cctalk wrote:
> Can you come up with any HP 7970 drives?
> I have spare 7/9 track read-only combo head stacks
> Don't know of how much time you want to spend on it
(Offlist)
I don't know, Al. I've got 6 tapes in a batch of 50 that are 7/556 and
are labeled w
On 07/07/2017 05:26 PM, Ethan Dicks wrote:
n't know of how much time you want to spend on it
>>
>> (Offlist)
>
> It wasn't off-list...
>
> -ethan
I realized that just after I hit "send".
My apologies to the list--I really don't want to clutter things up.
--Chuck
Just thought I'd mention running across a guy in the next town peddling
a Cipher F880 streamer with an S100 interface card for $150. Even
includes the (lowboy) rack.
Let me know if you're interested (I'm in Eugene, OR)
--Chuck
On 07/08/2017 04:20 PM, Ian S. King wrote:
> S-100?!?!?!? I have a couple of those drives. I don't have
> anything with S-100, but isn't there a SS-50 adapter to S-100? I'd
> love to have just the interface card.
That's what he claims. It could be a completely different bus.
--Chuck
On 07/08/2017 04:20 PM, Ian S. King wrote:
> S-100?!?!?!? I have a couple of those drives. I don't have anything
> with S-100, but isn't there a SS-50 adapter to S-100? I'd love to have
> just the interface card.
>From his photo, it does appear to be S100-sized.
https://eugene.craigslist.or
On 07/09/2017 07:30 AM, Al Kossow via cctalk wrote:
>
>
> On 7/8/17 5:18 PM, Chuck Guzis via cctalk wrote:
>
>> From his photo, it does appear to be S100-sized.
>
> I didn't see any 50 pin connectors, or regulators. If you look
> closely it's 8-bit ISA. You
On 07/09/2017 10:43 AM, Glen Slick via cctalk wrote:
>
> Maybe an Overland Data TX-8?
> http://www.ebay.com/itm/272743761884
>
> Doesn't look like a Computer Logics PCTD16
No, it's not that--the PCTD16 uses ZIP memory--I don't see that.
Perhaps an Overland TX-16. I don't know if I'd want to h
On 07/09/2017 12:57 PM, jim stephens via cctalk wrote:
> TC-PC, TX-8, and TC-I. The latter is a PCI board. This is probably a
> TX-8.
You're right--the card, as much as I can see of it, matches a TX-8. I
was thinking of the PCTD-III 8-bit controller. Supporting an F880 with
one of those would
On 07/09/2017 05:20 PM, jim stephens via cctalk wrote:
> I have inherited maybe 1000 tapes that I will have to sort and see
> if there is any salvaging. Not sure if they are any use, but it was
> a one time opportunity to snag them.
The silly thing is that a $15 MCU with a SD card can probably ha
On 07/10/2017 09:15 AM, Jon Elson wrote:
> You could do a controller using the Beagle Bone black and the PRU
> devices, which are 200 MHz 32-bit microcontrollers built into the
> Bone's processor. I used an FPGA to do a formatted Pertec interface
> for my CDC Keystone drives, but if I were to do
On 07/10/2017 09:50 AM, Mark J. Blair via cctalk wrote:
> I was previously planning to so that, and I still think that the FPGA
> approach would feel more natural to me than using the PRUs. But the
> Beaglebone seems like a much more economical approach. I'd need a
> processor to control it, an SD
On 07/10/2017 01:03 PM, Fred Cisin via cctalk wrote:
> On Mon, 10 Jul 2017, Chuck Guzis via cctalk wrote:
>> Well, that's the thing. I've been using the STM32F4 series of
>> MCUs--cheap, lots of I/Os and an integrated external memory interface.
>> Not super-fast;
On 07/10/2017 10:36 PM, Ethan Dicks wrote:
> Not quite - the $5 Zero is single-core. You have to go to a Pi2 or
> Pi3 to get multi-core.
>
> Still... GHz processor _systems_ (not just bare chips) are dirt cheap.
Okay, make that an Orange Pi Zero. Probably a better bang for the buck:
http://ww
This is one that I haven't seen addressed.
If I'm reading a 7-track tape and writing a SIMH .tap file, what's the
custom? 6 bits per 8-bit byte, right-justified (i.e. 2 high bits
zero-filled)?
Just wondering if there's a convention established for this.
--Chuck
On 07/13/2017 09:02 AM, jim stephens via cctalk wrote:
>
>
> On 7/13/2017 12:31 AM, Eric Smith via cctalk wrote:
>> There are also vacuum desoldering stations that use "shop air" to
>> derive the vacuum, rather than having an internal pump. I've never
>> used them as I don't normally have an air
of shop air, volume of delivery,
> proper adjustment of the vacuum system, all made the vacuum @ the
> desolder tip work properly.
>
> I'd have taken it off your hands.
> thanks
> Jim
>
> On 7/13/2017 10:22 AM, Chuck Guzis via cctalk wrote:
On 07/13/2017 09:14 PM, jim stephens via cctalk wrote:
> A friend asked about this, figured perfect for here.
> Any info?
> thanks
> Jim
Yup, there was definitely one in Santa Clara (IIRC). I picked up a few
things at their going-out-of business sale. I think one was a DTC
document feeder for
On 07/14/2017 09:00 AM, Jon Elson via cctalk wrote:
> Hmmm, I really don't remember any such thing. I suspect that some
> independent computer store chain got an OK to have a big Xerox logo out
> on the front. That would be quite believable. Some time in the early
> 80's there were computer sto
On 07/14/2017 08:37 AM, Toby Thain via cctalk wrote:
> Calculations of how much storage would be required aren't of much
> interest if the data itself isn't safely or cost effectively recoverable.
>
> The fault here isn't with NASA -- it's that few of us are able to store
> artefacts in suitable
On 07/15/2017 12:58 PM, Alfred M. Szmidt via cctalk wrote:
>Yes indeed! Still treasures to be found
>
> "There is no evidence that suggests this material is historically
> significant... I recommend disposal through the immediate destruction
> of all magnetic tapes."
Well, the semi-good
On 07/16/2017 02:50 PM, Paul Berger via cctalk wrote:
> That print technology was pretty common everywhere but at IBM for
> high speed line printers. When I was in college the service bureau
> that processed our FORTRAN had one that if I remember correctly was
> made by Honeywell and featured wavy
On 07/19/2017 09:49 AM, Paul Koning via cctalk wrote:
> An example where you'd be way off is the CDC 6000 series, which has
> integer mantissas and doesn't necessarily normalize the answers. So
> even apart from the encoding conversion, the answer won't match. Or
> the Electrologica X8, which ha
On 07/19/2017 03:10 PM, Eric Smith via cctalk wrote:
> I'm interested in the history of the logic design for the edge-triggered D
> flip-flop, as used in the SN7474. The design is composed of three set-reset
> latches (six NAND gates total) per flip-flop.
>
> Does anyone know what year the SN7474
On 07/19/2017 03:13 PM, Fred Cisin via cctalk wrote:
> To get rid of the pitting, you would have to grind, brush, or mill
> down to below the depths of the pits. Or fill them in (bondo?) and
> paint over. Maybe paint it like an 026 punch?
Crackle-coat paint looks very nice.
Removing pits by sand
On 07/19/2017 07:13 PM, Fred Cisin via cctalk wrote:
> In most places other than the south and Chicago, Coke and Pepsi are what
> is used. I don't think that SNL (Saturday Night Live) ever did a "No
> Coke; RC" skit.
There's also some stuff called "Naval Jelly"
http://www.loctiteproducts.com/p
On 07/20/2017 12:02 AM, Brent Hilpert via cctalk wrote:
> A copper layer can perform some filling and smoothing function in a plating
> job.
> Its perhaps more significant purpose however (as I understand it in my
> limited experience with having plating done*), is to provide an oxygen
> barrie
On 07/20/2017 10:42 PM, Steve Malikoff via cctalk wrote:
> Eric said:
>> I think Shugart settled on 5.25" for the size of a minifloppy at least a
>> year, and more likely two years, before Steve Jobs would have visited. I
>> don't have proof, but SA400 public intro was in 1976, and they probably
>>
On 07/21/2017 10:37 AM, Adrian Graham via cctalk wrote:
> I have a Facit9911 2 11/16” (or 70mm in new money) microfloppy drive with a
> mahoosive interface module which google turns up precisely nothing about. I’m
> pretty sure I’ve mentioned it here before but even a search of the archive
> tu
On 07/21/2017 12:19 PM, Paul Koning wrote:
> Interesting. Another example, slightly later, is the audio unit of the PLATO
> IV terminal (1974 or thereabouts). It uses a rather large disk, perhaps 10
> inches diameter, brown oxide, no grooves. It's a random access device, with
> 128 tracks.
On 07/23/2017 05:51 PM, Henry Bond via cctalk wrote:
> I have need to make backups, and if you are going to do something, do it the
> proper way. Feel like I'm preaching to the choir here mind.
>
> My issue is finding tape to fit any drive I might buy or choosing an
> appropriate tape library
On 07/23/2017 09:05 PM, devin davison via cctalk wrote:
> 30 seconds ago. I guess I should clean the Exabyte carts off my dining room
> table.
Heck, I've still got lots of DDS1 and 2 carts, DC1000 mini carts, and a
whole box of 8mm Exabytes. Various QIC carts, Travan, etc.
Did someone say Syqes
On 07/24/2017 11:31 AM, Fritz Mueller via cctalk wrote:
> To answer the question of "where hard to see", I guess it's really an
> issue of my old-man-eyes at this point. I find I need to use a
> jeweler's headset, or even bench microscope, to really see anything
> small in detail these days. It's
On the subject, I need someone with a better memory.
Around 1973 or so, I visited a friend at the old GE Plant in Phoenix.
All Hoyt could talk about was GECOS, but he was gracious enough to give
me a cook's tour of the development area, including the water-cooled
something or the other, which was
On 07/27/2017 12:48 PM, Noel Chiappa via cctalk wrote:
> > From: Charles Anthony
>
> > Gah. I saw a picture of one somewhere recently, but I can't remember
> > where.
>
> Are you thinking of this one:
>
> http://ana-3.lcs.mit.edu/~jnc/tech/jpg/SysConKAPanel.jpg
>
> Meter closeup h
Stupid me left a tape on my HP 7970 drive for too long and it has wedded
itself to the rubber hub retainer. Brute force isn't gong to work this
time.(Imation tape with the plastic hub). Tried getting some silicone
lube in to loosen things; no go.
So I need to pull off the reel hub from the motor
On 2017-07-28 4:31 GMT-03:00 jim stephens via cctalk
:
>
>>
>> Be the first on your block to own this one. I'm sure you can read
>> it.
>>
>> The-First-CD-Vintage-One-Only/
>> http://www.ebay.com/itm/322349181899
Well, to start with, let's take the obvious: 14" is not "compact",
even for An
On 07/31/2017 09:24 AM, Warner Losh via cctalk wrote:
> And there's often impurities in household vinegar, so you have to be
> a little careful which ones you use for cleaning. Balsamic Vinegar,
> not a good choice :). Though most of the white vinegars or
> concentrated vinegars work well enough f
On 07/31/2017 10:18 AM, Al Kossow via cctalk wrote:
> has anyone ever determined what the real active ingredient is in that
> stuff?
The MSDS is an exemplar for industrial obfuscation:
http://www.techni-tool.com/site/MSDS/218CH052.pdf
Composition? It's all proprietary, so we can't tell you.
Tox
On 08/01/2017 07:02 AM, Pete Lancashire via cctalk wrote:
> Or find a place that ships a lot of stuff and do the same there.
In my case, this. The outfit I use has a contract with a freight
shipper and their price for packing, palletizing and shipping is often
lower than my cost when dealing di
On 08/05/2017 06:29 PM, Eric Smith via cctalk wrote:
> Bubble memory devices typically have many minor loops, not all of
> which are usable. TI printed mask data on the label of the bubble
> device, identifying the defective loops. When a bubble memory board
> is installed or replaced in the ter
On 08/06/2017 04:16 PM, Gary McGill via cctalk wrote:
> I have an Visual 1050 computer (CPM based) with screen and keyboard.
> Probably works but I have not tried it yet. Will likely uncover boot
> disks, and other software.
>
> Anyone interested to pay shipping from Bellingham, WA?
>
Gary, t
I'm with Fred on this one. Get a socket, solder some pigtails to it
and use that, if you're worried.
I'd definitely do that if the plug were a mini-DIN. Standard DIN, not
so much. Just use a smaller probe with only the tip exposed through a
bit of "spaghetti".
--Chuck
On 08/08/2017 12:38 PM, Rico Pajarola via cctalk wrote:
> I have the whole archive, but you'd have to tell me which files you need.
> Note that most files from ftp.compaq.com are still available on
> ftp://ftp.hp.com/ (including all softpaqs).
>
> You should be able to install Windows 98 without a
Quick question, Rich--what kind of media are you using to test by
formatting to 1.2MB?
If they're SS media (as indicated by the position of the index
aperture), your drive will probably barf if you try to access the disk
as double-sided. We've all been spoiled by 5.25" and 3.5" media which
doesn
On 08/09/2017 01:41 AM, william degnan wrote:
> How about booting into dos and just formatting a disk that way?
Go back and read what I wrote, Bill. If single-sided media is being
used, DOS formatting will fail as there is no single-sided high-density
format available.
Of course, if double-s
On 08/09/2017 09:52 AM, Richard Cini via cctalk wrote:
> It's funny -- I didn't see the original reply from Bill to this
> message.
>
> I am aware of the track differences and I thought Dos would format
> it but just slam the head for the last three tracks. No such luck. It
> actually complains a
On 08/09/2017 10:57 AM, Richard Cini via cctalk wrote:
> "DON'T ASSUME..." AS THEY SAY ON TV. I'M OK WITH THE ADDITIONAL CLARITY.
> SINCE YOU HAVE A WORKING 242, WOULD YOU MIND CONFIRMING THE JUMPER SETTINGS
> FOR ME? JUST TRYING TO ELIMINATE AS MANY POTENTIAL ERROR POINTS.
I had a look and a
On 08/09/2017 12:41 PM, Fred Cisin via cctalk wrote:
> My naming convention is flawed. I think that at one point Western
> Digital made an "NEC compatible" controller, that isn't what I call
> "wd-style"
Yup, the WD37C65. Anyone need any? I've got a tubeful that I'm never
going to use. Used
On 08/09/2017 01:29 PM, Richard Cini via cctalk wrote:
> I don't have the screen print handy but if you look on Dave Dunfield's site
> under Disk/Software he has a controller registry. I'm using the Adaptec
> AHA-1522A which uses the National DP8437AV chip.
That should work with most common WD1
On 08/09/2017 01:47 PM, Fred Cisin via cctalk wrote:
> That is SO compatible with the NEC 765 chips that I'm going to CALL it
> an NEC chip.
> I wonder if has the same "flash-blind" behavior following index?
> I'll go out on a limb saying that I think that it will NOT give you any
> chaange from u
There's also the possibility that the drive alignment is so far out of
whack that you're not seeing the data on the SCP disks. This is
unlikely in drives that haven't been diddled with, but unless you bought
the drive NOS, you don't know that.
Grab a known-good 8" floppy--the format doesn't real
On 08/09/2017 03:06 PM, Fred Cisin via cctalk wrote:
> Yes.
> It is not clear whether the issue is with the disks, or with the
> hardware setup.
Again, maybe I'm reading too much into the comments, but I thought that
Rich had formatted a floppy using IMD and verified using the Analyze
function.
On 08/10/2017 01:29 AM, Christian Corti via cctalk wrote:
> That really depends on the drive. Ok, I think the Qume is "smart"
> enough to inhibit any write to side 1 on a SS media. But OTOH, many
> other drives are just happy doing anything that you request (e.g. the
> BASF drives I also use).
We
On 08/10/2017 11:16 AM, Noel Chiappa via cctalk wrote:
> It's even easier than that. I have used PakMail:
>
> https://www.pakmail.com/
>
> a fair amount, and have been very pleased with their service and pricing;
> they generally offer a pick-up service where they pick the item up, pack it,
>
On 08/11/2017 10:58 AM, Marvin Johnston via cctalk wrote:
> I seem to recall this topic has been brought up a couple of times
> over the past 20 years or so that ClassicCmp has been in existance,
> but I can't find the info. And technology has advanced :).
>
> I have probably at least 10,000 flopp
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