On Sat, Apr 13, 2024 at 10:48 PM Jon Elson via cctalk
wrote:
> Yes, there were a number of Versatec models for different
> paper sizes and pixel density.
Does anyone else have one in their collection?
I have an ICL-badged V80 which has a GPIB interface to link it to a
PERQ. I also have the
On Thu, Apr 4, 2024 at 1:48 AM Sellam Abraham via cctalk
wrote:
[Sent privately]
>
> Has anyone communicated with or know a way to communicate with Joe Rigdon
> out of Florida? Most here should know him as an old-school ClassicCmp
> veteran.
I have just heard that he attended the HP Handhelds
On Sat, Apr 6, 2024 at 3:54 PM Douglas Taylor via cctalk
wrote:
>
> The DEC VT340 has a slot in the back of the terminal to insert a ROM
> cartridge. I can't find any description of what this DEC labeled ROM
> cartridge would do for you. I've seen them with V1.1 and V2.1 markings,
> does anyone
On Fri, Apr 5, 2024 at 1:33 PM Tony Duell wrote:
>
> On Thu, Apr 4, 2024 at 8:58 PM Zane Healy via cctalk
> wrote:
>
> > Have you checked with Eric Smith or Dave McGuire? I want to say that Dave
> > was in the same general area as Joe when he lived in Florida.
>
> I've asked Wlodek Mier-J of
On Thu, Apr 4, 2024 at 8:58 PM Zane Healy via cctalk
wrote:
> Have you checked with Eric Smith or Dave McGuire? I want to say that Dave
> was in the same general area as Joe when he lived in Florida.
I've asked Wlodek Mier-J of the British HPCC calculator club if he has
any contact details.
On Sun, Mar 17, 2024 at 3:38 PM Adrian Godwin via cctalk
wrote:
>
> HP at least sometimes used staff.
There's one HP publicity photo I remember that I surely hope was staged.
It's for the HP9880 hard disk system for the HP9830 calculator. The
disk drive is an HP7900, a fixed/removeable platter
On Wed, Feb 21, 2024 at 9:39 AM Stefan Skoglund via cctalk
wrote:
>
> Liam, TriPOS ?
>
> If i'm not wrong it was a OS developed in Cambridge (Cambridgeshire).
It was. The name came from the fact that a course at Cambridge
University is called a Tripos. Originally written by Martin Richards
(as
On Fri, Dec 1, 2023 at 4:22 AM Chuck Guzis via cctalk
wrote:
>
> On 11/30/23 15:46, Van Snyder via cctalk wrote:
> > I was given a 22-inch Viewsonic monitor. The label had been scratched
> > off. It has four switchesd below the screen, labeled 1, 2, an up arrow,
> > and a down arrow.
> >
> > When
On Wed, Nov 29, 2023 at 6:16 PM Rob Jarratt wrote:
> I am working on the schematic and when it is done I will post it for
> information. However, I was wondering what you suggest for testing the board
> once I have done this. Simply replacing the blown fuse and plugging it in
> doesn't sound
On Sat, Nov 25, 2023 at 11:12 PM Rob Jarratt
wrote:
> > Have you checked the diodes and capacitors associated with the flyback
> > transformer? If something is shorted there. it's the equivaent of running a
> > power supply into a short circuit. The input current will go up.
>
> I have checked
On Sat, Nov 25, 2023 at 12:07 PM Rob Jarratt via cctalk
wrote:
>
> Hello,
>
>
>
> As some may recall I have been working on getting a VT100 going again. I
> have made good progress and I think the main board is probably OK now (see
> here if you are interested:
>
On Sun, Oct 1, 2023 at 8:38 AM Wouter de Waal via cctalk
wrote:
>
> Hi all
>
> I re-discovered some eurocards I found in a box at a swapmeet long ago.
>
> It looks like a complete 8085 system. Lots of RAM, 2K EPROM, I/O, FDC.
>
> The strange thing is that the EPROM is mapped at F800, the code in
On Fri, Sep 1, 2023 at 6:29 PM Rick Bensene via cctalk
wrote:
>
> Tony wrote:
>
> > Didn't Singer own Friden (or at least the name) at one point? I am sure
> > I've seen calculators
> > batched(sic) 'Singer Friden').
> Singer effectively began the death of internal electronic calculator
>
On Fri, Sep 1, 2023 at 4:51 PM dwight via cctalk wrote:
>
> My first computer was a Poly-88. I had no monitor and no keyboard.
> I read and understood the instructions about finding a TV that used a
> transformer power supply. Many newer TV's of that day were not using a
> transformer for the
On Fri, Sep 1, 2023 at 4:31 PM dwight via cctalk wrote:
>
> I do understand the warranty sticker. Say we have the average computer buyer.
> He has a screw driver and mostly knows how to use it. He also went to Radio
> Shack ( long gone ) and bought a cheap soldering iron. He is now fully
>
On Thu, Aug 31, 2023 at 9:53 PM Chris Zach via cctalk
wrote:
>
> Which is weird, since Radio Shack was renowned for putting schematic
> diagrams on so many of their products. My Flavoradio still has the
> schematic on it if a transistor goes bad
And they would sell spare parts and service
On Thu, Aug 31, 2023 at 7:49 PM Fred Cisin via cctalk
wrote:
> On Thu, 31 Aug 2023, geneb via cctalk wrote:
> > Fun fact - the "Warranty Void if Removed" tags were and are illegal. The
> > warranty can only be voided if the mfgr can prove the thing you did resulted
> > in the problem you're
On Sun, Aug 13, 2023 at 5:20 PM Nigel Johnson Ham via cctalk
wrote:
> The DEC Rainbow RX50s only have one motor :-)
{being pedantic}
No they don't. They have 2. A permanent-magnet DC motor used to drive
both spindles and a stepper motor used to position both heads.
But I will agree it is a lot
On Sat, Aug 12, 2023 at 4:36 AM Chuck Guzis via cctalk
wrote:
>
> On 8/11/23 16:08, Fred Cisin via cctalk wrote:
> >
> > Or, is it correct to refer to anything between DA and DB as "DB"??
> > (such as "DB-23" on Amiga? Yes, I dremeled a DB25 to fit.)
>
> Atari ST also used strange shell/pin
On Tue, Jun 27, 2023 at 12:35 AM Mark Huffstutter via cctalk
wrote:
> I've never seen an HP-9830A that gorgeous, and with the
> Companion HP-9866A printer no less, wow!
What I'd like to see is an HP9830 with the HP9880 disk system (an
HP7900A drive with a special controller). Any still
On Wed, Jun 28, 2023 at 5:02 PM Chris Zach via cctalk
wrote:
> Yup, it's a DEC thing, however the DEQNA cab kits do the proper cam and
> lock interface. I thought about removing the nuts, but went with
> ordering a cable and I'll pull the studs off it to make it work. Sub
> optimal but that is
On Wed, Jun 28, 2023 at 2:44 PM Jonathan Chapman via cctalk
wrote:
>
> > For a few inches, which would be enough here I think, I've used an IDC
> > DA15 plug and socket crimped onto the normal ribbon cable. Technically
> > it's wrong but the reflections on that length of cable won't matter.
>
>
On Wed, Jun 28, 2023 at 6:00 AM Grant Taylor via cctalk
wrote:
>
> Tony's email makes me ask more questions than I have (smart alack)
> answers to. Maybe ~> hopefully I can ~> will learn something.
I was being a bit of a smart alec too. The point I was making is that
a bit of normal IDC ribbon
On Wed, Jun 28, 2023 at 6:13 AM Fred Cisin via cctalk
wrote:
> With many boxes of used cables, often there will be cables that are DB-25,
> but with 16 pins missing in the 25 pin connector, often leaving pins 1-8
> and 20, and gaps where other pins could have been.. I call THAT a DB-9
>
The
On Wed, Jun 28, 2023 at 1:19 PM Paul Koning via cctalk
wrote:
>
>
>
> > On Jun 28, 2023, at 1:13 AM, Fred Cisin via cctalk
> > wrote:
> >
> > DA, DC, DE connectors are a different size D shell than the DB, which is
> > the one commonly used for a 25 pin cable.
>
> There is also DD, though I've
On Wed, Jun 28, 2023 at 2:17 AM Chris Zach via cctalk
wrote:
>
> Anyone in MD got an AUI cable (few feet long) I can steal so I don't
> have to remove the bolts from the Pro/380's Ethernet socket or the pins
> on my 10bt ethernet MAU?
For a few inches, which would be enough here I think, I've
On Mon, Jun 26, 2023 at 3:38 PM Jan-Benedict Glaw via cctalk
wrote:
>
> Hi!
>
> As I'm preparing to setup my old hardware, I fetched two VAXstations
> (4000/90 and /96) from storage and cleaned one of them throughoutly.
>
> Then I gave power (to both of them), but both won't really start:
> all
On Mon, Jun 26, 2023 at 1:06 PM Steve Lewis via cctalk
wrote:
>
> VCF SW was this past weekend near Dallas, Texas.
>
> Here are some highlights from my perspective.
>
> https://voidstar.blog/vcf-southwest-2023/
>
>
> Most photos you can click to enlarge (Edge has bugs with WordPress, you may
>
On Sun, Jun 25, 2023 at 5:52 PM Rob Jarratt wrote:
>
> Before I confuse matters too much I should point out that I was not using the
> Rainbow power switch unit but one from a DECmate. I had erroneously thought
> there was a fault with the Rainbow one. I think the fan supply may be
> different
On Sun, Jun 25, 2023 at 5:33 PM Rob Jarratt wrote:
>
> Thanks Tony. I removed the mains bridge rectifier and found it measured short
> across two of its terminals, so I am ordering a replacement. I tested the
> PSU, without the mains bridge rectifier and without the diodes on the output
> of
On Sun, Jun 25, 2023 at 1:36 PM Rob Jarratt via cctalk
wrote:
>
> Hello,
>
> It has taken me ages to get back to this, but I think I have hit an
> insurmountable problem.
>
> I reassembled the PSU after the PWM started working again and tested it with
> a dummy load and using two 100W light bulbs
On Sun, Jun 25, 2023 at 8:31 AM r.stricklin via cctalk
wrote:
>
>
> > On Jun 24, 2023, at 11:10 PM, Tony Duell via cctalk
> > wrote:
> >
> > And this is where I get lost..
> >
>
> I do not understand your overbearing attitude of helplessness toward
Still trying to make sense of this thing.
The problem is that one very important thing is missing. I refer to
DODUMENTATION. I don't fall for this modern rubbish that a product
with a thin manual is easy to use. No, the thicker the manual the
better. It will probablt answr my questions. But the
; On Sun, 11 June 2023, 10:44 pm Tony Duell via cctalk,
> wrote:
>
> > > Fundamentally, it seems to me that they're all the same basic hardware,
> > > timing intervals between flux transitions.
> > >
> > > So other than the soaftware, what's the difference?
On Sun, Jun 11, 2023 at 9:07 PM Sellam Abraham via cctalk
wrote:
> "While I don’t recall saying that, I may well have - I know that I was
> involved in the engineering question of how safe it would be to use.
>
> The inverter produced 230 VDC, which it turned out could be safely fed to
> the
On Mon, Jun 12, 2023 at 1:25 AM Chuck Guzis via cctalk
wrote:
>
> I'm a bit surprised that there don't seem to be any adaptations that
> hook into the head pre-amps and use an ADC to give a view of what the
> read signal actually looks like. Maybe that's asking too much--there
> are certainly
> Fundamentally, it seems to me that they're all the same basic hardware,
> timing intervals between flux transitions.
>
> So other than the soaftware, what's the difference?
I could make a stupid comment and ask 'what's the difference between a
PDP8, PDP11, PERQ or HP9830?'. Apart from having
Well, I've got the Greaseweazle software to run, but I don't know why,
which is hardly encouraging.
Installing various Windows updates, downloading .dlls, and puting the
latter in various directories changed the error messages but it never
actually worked. But downloading the latest Greaseweazle
On Wed, Jun 7, 2023 at 1:36 AM John Floren via cctalk
wrote:
> Thanks, Bob, that would be very helpful! I think the biggest thing is
> figuring out how the pack was wired into the J4 header on the PSU... if
> you've got the manuals for the DC option, it might have schematics too.
Be very
On Tue, Jun 6, 2023 at 7:47 PM Paul Koning via cctalk
wrote:
> I'm reminded of a comment about the PDP-11 family:
>
> "A PDP-11/xx is compatible with a PDP-11/yy if and only if xx == yy".
That I suspect is actually false. The11/05 and 11/10 were the same
machine, ditto the11/35 and 11/40.
On Tue, Jun 6, 2023 at 3:42 AM John Floren via cctalk
wrote:
> It's funny that luggable power packs come up here as I'm trying to revive my
> Otrona Attache... The power supply does nothing on AC input, even after a
> recapping, so I thought I'd investigate the "DC Power Option" described in
On Sun, Jun 4, 2023 at 10:57 PM Fred Cisin via cctalk
wrote:
>
> On Sun, 4 Jun 2023, Rick Bensene via cctalk wrote:
> > an example of early "mobile computing". (Tongue firmly in cheek).
>
> The original Osborne 1 had a 12V power input!
Actually it's +12.6V and +5.6V and you have to supply both
On Tue, May 30, 2023 at 5:09 PM philip--- via cctalk
wrote:
>
> I wasn't trying to solve the whole problem at once!
>
> A lot of people have recommended "sneakernet" to connect your modern
That's an expression which always sounds odd to me. The footwear known
as 'sneakers' across the Pond is, I
On Tue, May 30, 2023 at 12:22 PM Adrian Godwin via cctalk
wrote:
>
> There was an isolation transformer followed by a variac. The procedure was
> to slowly bring up the variac until the control circuit was functioning,
> check the waveforms around that, and then increase the supply voltage while
On Tue, May 30, 2023 at 11:33 AM Hans-Ulrich Hölscher via cctalk
wrote:
>
> What can/will go wrong in either case, and why?
The normally-given reason is that an SMPSU approximates to being a
constant power load and draws more current if the input voltage is
reduced. This can cause the chopper
On Sun, May 28, 2023 at 4:36 PM Chuck Guzis via cctalk
wrote:
> All of these flux-transition gizmos, whether or not they're the
> Applesauce, Greaseweazle, Catweasel, Fluxengine, Deviceside work
> exactly the same way. A counter free-runs, and every time there's
> change in direction of
On Sun, May 28, 2023 at 2:32 PM Adrian Godwin via cctalk
wrote:
>
> Tony,
>
> An instrument slightly more to your taste than a PC might a 16500b logic
> analyser. Perhaps you've already got one. I believe these can work with
> both LIF and MSDOS floppies and uses an IDE HDD (which can painlessly
> I'm suprised to hear you're familliar with the GreaseWeasel but have
> never heard of BlueSCSI. ( https://scsi.blue/ ). Though SASI
> compatability seems "possible but not guaranteed", being an open source
> project, you can probably wangle the existing PCB's/software to be SASI
> compliant.
On Sat, May 27, 2023 at 10:00 PM Alexander Schreiber via cctalk
wrote:
> Which is why among the more cynic^Wexperienced SREs (my line of work)
> we sometimes use the term "Working As Implemented" when the code behaves
> exactly as written (and ofteni as specified), but still does the wrong
>
On Sat, May 27, 2023 at 8:47 PM philip--- via cctalk
wrote:
>
>
> > USB interfacing is hard, but SD cards are a lot simpler. So use a card
> > reader thing to transfer the files to an SD card and design an
> > interface for that to ISA bus.
>
> Thinking of that, I had actually wondered whether
> Would it be possible to build a small computer, 8088/8086
> just for this?
>
I don't see why not, but given the choice I'd pick just about any
other processor family. Probably a 68000.
-tony
On Thu, May 25, 2023 at 1:54 AM Mike Stein via cctalk
wrote:
>
> I realize he's a bit eccentric, (even more so than many of us ;-) ), but I
I am not 'a bit eccentric'. There is absolutely nothing mild about my
eccentricities!
> But it sounds like he'll explore one of the flux-transition
On Wed, May 24, 2023 at 10:54 AM emanuel stiebler wrote:
>
> On 2023-05-24 05:26, Tony Duell via cctalk wrote:
> > On Wed, May 17, 2023 at 5:29 AM Fred Cisin via cctalk
> > wrote:
> >
> >> Last time that I tried to research it, I found that there had once bee
On Wed, May 17, 2023 at 5:29 AM Fred Cisin via cctalk
wrote:
> Last time that I tried to research it, I found that there had once been an
> external drive in which the USB and controller werenot integrated with the
> drive electronics, so that it could easily get a different drive
> connected.
On Tue, May 23, 2023 at 2:21 PM Paul Koning wrote:
> > I do seriously wonder why nobody has been suggesting the
> > flux-transition type of device. If it can be got to work then it would
> > seem the ideal solution in that it can handle anything the disk drive
> > [1] can handle, including non
On Tue, May 23, 2023 at 2:03 PM Chris Zach via cctalk
wrote:
>
> On 5/22/2023 11:53 AM, Sellam Abraham via cctalk wrote:
> > I learned a long time ago that it's a waste of time to trying to help
> > someone who, instead of focusing on solutions, just comes up with endless
> > reasons why your
On Mon, May 22, 2023 at 2:14 PM Liam Proven via cctalk
wrote:
>
> > And
> > of course it has to have the right type of disk controller, I
> > certainly need to be able to handle single-density (FM) reading and
> > writing correctly. Some machines can, some can't. I am hardly going to
> > be able
On Mon, May 22, 2023 at 5:25 PM j...@cimmeri.com wrote:
>
> On 5/22/2023 5:38 AM, Tony Duell via cctalk wrote:
> >>> I hereby formally retract my erroneous suggestion of a "386 98,SP2 desktop
> >>> with floppies and USB", and replace my suggestion with:
>
On Sat, May 20, 2023 at 12:22 PM Liam Proven via cctalk
wrote:
>
> On Fri, 19 May 2023 at 23:40, Fred Cisin via cctalk
> wrote:
> >
> > On Fri, 19 May 2023, Liam Proven via cctalk wrote:
> > > I do remember that, because I carried around a USB key with an
> >
> > Thanks, everybody for the
On Thu, May 18, 2023 at 8:03 PM Fred Cisin via cctalk
wrote:
>
> > >
> On Thu, 18 May 2023, Robert Feldman via cctalk wrote:
> > Can you fix it using MODE.com from a DOS prompt?
>
> Or, a full re-install of the USB-RS232 dongle?
Depends on what you mean by a re-install...
Asking Windows to
On Thu, May 18, 2023 at 5:28 PM Mike Katz wrote:
>
> I run the greaseweazle under window 10 and windows 11. I havent' seen
> any problems as of yet but I am using the command line utilities mostly.
I was running from the command line too. Typing 'gw' just gets a
dialogue box moaning that the
On Thu, May 18, 2023 at 5:05 PM Chuck Guzis via cctalk
wrote:
>
> On 5/18/23 08:48, Tony Duell via cctalk wrote:
>
> > I wish I'd never listened to people who said this was easy and would work
> > fine.
> >
> > Never again.
> >
>
> I warned you about
On Thu, May 18, 2023 at 3:16 PM Antonio Carlini via cctalk
wrote:
> At ~£25 you're unlikely to lose much with either of the two front
> runners :-)
Unfortunately in my case that is not true.
I ordered a Greaseweazle earlier today and downloaded the software. Of
course there is no such thing as
On Wed, May 17, 2023 at 9:28 PM Mike Katz via cctalk
wrote:
>
> I have to agree with the folk on here who recommend some kind of flux
> reader/writer like the greaseweazle.
OK, that's what I thought.
Now what are the options. Greaseweazle or ? What are the
advantages and disadvantates of
On Wed, May 17, 2023 at 8:49 PM Chuck Guzis via cctalk
wrote:
> As much as Tony doesn't like it, I need to point out that a modern MCU
> quite often has as much (or more) RAM, and runs faster than many older
> PCs. Consider, for example, the lowly STM32H7A3 series. 1.4MB of RAM,
> 2MB of
On Wed, May 17, 2023 at 8:38 PM Fred Cisin via cctalk
wrote:
> The earliest Osbornes were single density with ten 256 byte sectors per
> track. I was able to write some code on TRS80 model 1 to read those.
> Many PC FDCs, including the IBM 5150/5160, can not do FM/single-density.
>
> Then
On Wed, May 17, 2023 at 5:54 AM Chuck Guzis via cctalk
wrote:
>
> On 5/16/23 21:29, Fred Cisin via cctalk wrote:
>
> >> From what I've heard, there has been substantial progress on the flux
> > transition devices, with decoding the track to sectors, and even support
> > of some file systems!
> >
On Wed, May 17, 2023 at 5:29 AM Fred Cisin via cctalk
wrote:
>
> >> Similarly, he could buy a cheap external USB 3.5" drive. Write content to
> >> that drive on the modern machine, and read those floppies on the older
> >> machines. The readily avaailable one have firmware that only supports
>
On Tue, May 16, 2023 at 11:42 PM Fred Cisin via cctalk
wrote:
>
> On Tue, 16 May 2023, Wayne S via cctalk wrote:
> > Tony in response to your original idea of wanting to download images for
> > use on you existing machines ( did i get that right?), i think you have
Yes. I've got the machines
As you know I've recently restored a couple of CP/M luggable
computers. I also have many other machines with floppy disk drives,
3", 3.5", 5.25" and 8"
The machine I connect to the internet with is a more modern laptop
runnng Windows 8.1. Essentially its only interfaces are USB ports.
I would
On Tue, May 2, 2023 at 1:34 PM Paul Koning via cctalk
wrote:
>
> It seems surprisingly hard to find that, though this
> https://forum.vcfed.org/index.php?threads/rs-232-to-current-loop-interface.47841/
> is close.
>
> Conceptually it's really easy. The main tricky part, certainly if you're
>
On Tue, Apr 18, 2023 at 11:04 PM John Robertson via cctalk
wrote:
>
> I like to start with schematics before poking too much...
So do I.
>
> I assume bad caps (will replace with low-ESR high temp), and possibly
> blown transistor(s)...
>
> *And Gregory Beat sent me a link that covers the 1001
On Wed, Apr 19, 2023 at 2:37 AM Tom Hunter via cctalk
wrote:
>
> ... or four $20 power transistors to protect a 10 cent fuse like on the DEC
> VR-14 display.
In general the transistor(s) will fail short-circuit, thus taking out
the fuse too.
Some switch-mode power supplies use special
On Tue, Apr 18, 2023 at 2:51 PM Tom Hunter via cctalk
wrote:
>
> The blown out resistor likely has "blown out" for a reason.
> The replacement will probably suffer the same faith unless you find the
> root cause.
As soon as I saw 'Boschert' mental alarm bells triggered
Boschert made a
On Wed, Mar 8, 2023 at 3:11 AM Chris Zach via cctalk
wrote:
>
> I noticed in a Dectape 2 document that the tape drives are just DC100
> models. Are there any specific documents on what kinds of signals should
> be coming out or into them?
>
> I'd like to fix this TU58.
The drive unit from a TU58
On Mon, Feb 27, 2023 at 10:29 AM jake utley via cctalk
wrote:
>
> I’ve been restoring a RM380 I picked up not long ago and it’s been good news
> and bad news. All the cards are in wonderful condition and the case is
> presentable however the two BASF 6106 floppy drives are highly corroded and
On Sun, Feb 5, 2023 at 11:12 AM emanuel stiebler via cctalk
wrote:
> Keep "all" magnets away from disks :)
The hubs of 3.5" floppy disks and of the disk packs used in RK05s,
RL01s/02s, RK07s, etc are locked to the spindle by a ring magnet.
-tony
On Fri, Feb 3, 2023 at 5:21 PM Alexandre Souza
wrote:
>
> I thoug the right one was st512...can you enlighten me on this subject Tony?
I've never heard it called that.
It's often called 'ST506' but that drive had a few differences from
the later ones. it didn't support buffered seeks AFAIK. The
On Fri, Feb 3, 2023 at 4:57 PM Chris Zach via cctalk
wrote:
> Yep, with 15 yeads it had a servo platter that is gone. Oh well, it's
> securely erased :-) I'll toss the drive, keep the electronics interface
> and keep it in mind for the future.
If you have the tools, it's worth carefully
On Fri, Feb 3, 2023 at 4:40 PM Chris Zach via cctalk
wrote:
>
> Question: I just used a strong magnet to wipe an old Maxtor MFM drive
> (magnet on outside of case). Now the drive will not even seek properly
> on start up, just endlessly moves the heads..
>
> Is the drive now toast? Do MFM drives
On Fri, Feb 3, 2023 at 2:41 PM Will Cooke via cctalk
wrote:
> Yes. The thresholds shift with temperature. Some companines (DEC?) used
> temperature-compensated amplifiers to address the issue. IBM, on some models
> like the 1620, kept the cores at a constant (elevated) temperature.
Most
On Tue, Jan 31, 2023 at 11:50 PM Ali via cctalk wrote:
>
> > (~$300), monitor (CGA had compoosite output, so could connect to cheap
> > CCTV, etc. monitors, and CGA even had a dedicated 4 pin Berg for the
> > SupRMod RF adapter), and maybe serial, and/or parallel.
>
> Fred,
>
> This is the first
On Tue, Jan 31, 2023 at 6:53 PM Jim Brain via cctalk
wrote:
> I think (I might have mentioned it at the thread start) it was part of a
> plan for a school network. Tandy offered a similar setup for schools
> for the Model 1/3/4 systems, where the "host" could send programs, and
> the clients
> "DLOAD is the most obscure command in the Color
> Computer and absorbs a substantial amount of space in the ROM. DLOAD is so
> poorly
> understood because Tandy has never made the necessary companion routine,
> DSEND.
I wonder if it was originally intended (or even used) at the factory
to
On Tue, Jan 31, 2023 at 10:56 AM Philip Belben via cctalk
wrote:
>
> > ZX80, ZX81, Spectrum, Acorn Acom, Acorn Electron, BBC Micro, etc, etc.
> > Do you count machines like the Amstrad CPC464 which had a built-in
> > cassette recorder?
>
> And don't forget the Commodore cassette port - used on
On Mon, Jan 30, 2023 at 6:47 PM Fred Cisin via cctalk
wrote:
> The 5150 had a cassette port!
> Diagnostics were supplied on cassette tape.
[...]
> There was an outfit that marketed a sorta network using the 5150 cassette
> port, for classroom distribution, etc.
There was the Radio Shack
On Mon, Jan 30, 2023 at 5:34 PM Jim Brain via cctalk
wrote:
>
> On 1/30/2023 11:14 AM, Chris via cctalk wrote:
> > It had a dedicated cassette port? Don't most cassette ports resemble a
> > serial port, or is my wonky brain making that up? What protocols did most
> > cassette ports use
On Fri, Jan 27, 2023 at 11:53 AM Chris via cctalk wrote:
> C: there never was a person worse at sports then me.
You have not met me!
If I manage to kick or throw a ball, it will go about +/- 1 radian of
where I would like it to go. I can run 100m in about 10 minutes.
Get the idea?
I''ll
On Fri, Jan 27, 2023 at 4:15 AM Fred Cisin via cctalk
wrote:
>
> We also probably don't have very many athletes here.
Not unless you class 'electronics' as a sport. I managed to do so at
school many years ago, meaning that while other boys were chassis
spheres and prolate spheroids about I was
On Wed, Jan 25, 2023 at 11:35 AM Adrian Godwin wrote:
>
> On Wed, Jan 25, 2023 at 10:27 AM Tony Duell via cctalk
> wrote:
>>
>>
>> I've put a few photos of the machine (in bits) in my flickr account here :
>>
>> https://www.flickr.com/photos/tony_duell/
On Wed, Jan 25, 2023 at 10:41 AM jos via cctalk wrote:
> >> It booted straight up
> > Where's the fun in that?
> >
> >
> Not much, agreed. But plenty of other stuff here to keep me occupied well
> until I am 130 years old !
Oh yes, same with me. More projects than I could ever complete.
On Wed, Jan 25, 2023 at 7:41 AM Tom Hunter via cctalk
wrote:
>
> Thank you Tony for your well written and informative post describing the
> restoration of a Philips P2000C luggable.
> I wish there would be more posts like yours.
Thanks.
I've put a few photos of the machine (in bits) in my
On Wed, Jan 25, 2023 at 7:52 AM jos via cctalk wrote:
>
>
> Interesting and detailed description, thanks !
>
> my P2000C "restauration" was much simpler :
>
> I picked it up, including carrying case and all the original disks, from the
> e-waste ( illegally..) and found it be be in pristine
On Tue, Jan 24, 2023 at 7:47 PM Will Cooke via cctalk
wrote:
>
>
>
> > On 01/24/2023 11:09 AM CST Tony Duell via cctalk
> > wrote:
> >
> >
> > A couple of questions if anyone has experience of this machine :
> >
> > 1) There is a 5 pin DIN
On Tue, Jan 24, 2023 at 7:02 PM Adrian Godwin wrote:
>
> On Tue, Jan 24, 2023 at 6:46 PM Tony Duell wrote:
>>
>> >>
>> >> 1) There is a 5 pin DIN socket for connecting an external video
>> >> monitor. The signals seem to be TTL-level separate syncs at European
>> >> TV rates (15625Hz horizontal,
On Tue, Jan 24, 2023 at 6:35 PM Adrian Godwin wrote:
>
> On Tue, Jan 24, 2023 at 5:09 PM Tony Duell via cctalk
> wrote:
>>
>> A couple of questions if anyone has experience of this machine :
>>
>> 1) There is a 5 pin DIN socket for connecting an external v
On Tue, Jan 24, 2023 at 6:16 PM Jim Brain via cctalk
wrote:
>
> On 1/24/2023 12:12 PM, Tony Duell via cctalk wrote:
> > I've skimmed the thread about making images of floppy disks. I want to
> > do the reverse.
> Greaseweazle will do this. Use the same HW setup as for im
I've skimmed the thread about making images of floppy disks. I want to
do the reverse.
But I had better explain. There are 2 subsets of computers here. The
larger subset -- all but one of the machines -- are classic computers.
These machines tend to hve real floppy drives and RS232 ports and not
A couple of questions if anyone has experience of this machine :
1) There is a 5 pin DIN socket for connecting an external video
monitor. The signals seem to be TTL-level separate syncs at European
TV rates (15625Hz horizontal, 50Hz vertical) and separate (not
composite) 4-level analogue video.
Philip Belben gave me a Philips P2000C luggable CP/M computer some
time back which had not been well-stored. It took a bit of work to get
it going
again. Here's what I did...
The basic desgn is a single-board computer with a Z80A, 64K RAM, 4K
ROM (bootstrap and a machine code monitor), floppy
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