>Message: 21
>Date: Mon, 5 Jun 2023 04:35:28 +0100
>From: Tony Duell <ard.p850ug1(a)gmail.com>
>Subject: [cctalk] Re: Getting floppy images to/from real floppy disks.
>
>On Sun, Jun 4, 2023 at 10:57 PM Fred Cisin via cctalk
><cctalk(a)classiccmp.org> 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 voltages.
>It's one diode drop to the +5V (logic supply) and +12V (DRAM, disk
>motors, monitor supply), the -5V for the DRAM is produced on the logic
>board.
>
>I am told it was never used and that the Osborne battery pack came
>with an inverter to provide 110V AC.
>
>-tony
It (the Osborne Powr-Pac (tm) ) has a what the manual says is a DC-DC inverter that plugged into a Gould lead-acid battery (or the cigarette-lighter socket in a car) at one end and the AC input of the Osborne 1 at the other. I have read on this list that Lee denies that OCC ever sold them, but I have one that I bought for $50 at Compumat in Chicago on October 10, 1983 -- I still have the unit, receipt, and User Registration card. It came with a glossy-printed grey-and-blue manual, like other contemporary OCC products.
If anyone wants a copy, I can email you a PDF scan of the user manual.
Bob
For various reasons (including, but not limited to, insanity and obsessiveness*) I am building a diode laser based tape punch. It's not specifically for a classic comp, but I'd like to stick with standard format so that it'd be useful for making custom tapes for members in the future. I will probably need to make dozens of tapes so using actual, vintage rolls is out of the question. Does anyone know if 1" tape is used for anything else and where I might find some new? Otherwise I may have to add paper-slitter to my project list and make my own.
*I've had the idea of a lost-media ARG stuck in my head for years.
Hello!
I have an IBM 6152 aka IBM RT system I rescued. (It may be a 6151?)
I'm 90% sure it has colour graphics. The system does seem to POST
correctly (according to the LED on the front) but the CRT is dead. I'm
wondering if anyone has built an adapter to hook this to a VGA
monitor.
I'm a bit confused by the pinout. It has high and low bits for the RGB
(and associated grounds for each colour.) So I'm not sure how that
would work hooking to a more modern monitor.
http://bio.gsi.de/DOCS/IBM/615x/faqshard.html
Otherwise I need a crash course in fixing CRTs.
--
-Jon
+44 7792 149029
Hi:
Doing some research for historical purposed – no litigation at all – trying to identify the first “legal” PC-DOS compatible PC, “legal” in the sense that it’s BIOS was not a copy of an IBM BIOS. Eagle gets the honor of being first MS-DOS compatible and getting sued for copying IBM’s BIOS 😊
The Compaq Portable which shipped in November 1982 is generally credited with the first legal MS-DOS compatible PC. AFAIK it could not run PC-DOS and those applications which depended upon certain IBM BIOS commands would fail.
The first “legal” BIOS is generally considered to be from Phoenix which was announced in May 1984 and so far I have been unable to determine its first system deployments. FWIW Wikipedia points to HP, Tandy and AT&T as some time adopters of a Phoenix BIOS but my research so far is that Tandy’s T1000 family announced in October and November of 1984 was the first system to be PC-DOS compatible and it did not use a Phoenix BIOS! Such PC-DOS compatible HP and AT&T systems were much later and the Tandy BIOS was written by programmers of Tandon Corporation, the OEM supplier of the first Tandy T1000s.
Can anyone identify a PC-DOS compatible PC announced earlier than October 1984? Citations would be greatly appreciated.
Thanks
Tom
> Begin forwarded message:
>
> From: segaloco via TUHS <tuhs(a)tuhs.org>
> Subject: [TUHS] Pixel 100/AP UNIX Computer
> Date: June 7, 2023 at 12:17:14 AM PDT
> To: The Eunuchs Hysterical Society <tuhs(a)tuhs.org>
>
> After talking with the folks I bought the recent documents from, they let me know they are also selling a piece of hardware: https://www.ebay.com/itm/125714380860
>
> After the link is an auction for an Instrumentation Laboratory Pixel 100/AP. A small booklet included with the many documents I received indicates as of 1982 the Pixel 100/AP ran a System III derivative. The booklet goes on to present a summary of user commands and options. Despite the System III basis, included among these are the C shell and ex/vi.
>
> I have no room for hardware or honestly at that price point it'd be worth the preservation effort. Hopefully it finds a good home, it includes an almost complete documentation set save for the small booklet I've got (which could be separate promo material for all I know)
>
> In any case, there were a few letters amongst the documents suggesting the original owner was involved in the production of this system, particularly in the area of OS details. If I find any noteworthy information I'll pass it along.
>
> - Matt G.
>
> P.S. If anyone knows of a preservation effort accepting new machines I can pass this along.
This was originally posted to “The Unix Historical Society” email list and I asked the original author for permission to forward it here.
If anyone is interested in such equipment.
David
There are two ways to write error-free programs; only the third works.
--Alan J. Perlis
David Barto
barto(a)kdbarto.org
David A. Smith has posted the source code for The Colony
(for Mac, PC and Amiga)
- the first realtime 3d adventure game.
https://github.com/Croquetx/thecolony
>Message: 7
>Date: Tue, 06 Jun 2023 02:41:56 +0000
>From: John Floren <john(a)jfloren.net>
>Subject: [cctalk] Re: Getting floppy images to/from real floppy disks.
>To: "General Discussion: On-Topic and Off-Topic Posts"
> <cctalk(a)classiccmp.org>
>
>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 the manual. Unfortunately I >can't find any record that Otrona ever actually *sold* a "DC Power Option", which >would plug into an unpopulated 6-pin Molex connector on the back of the device. >Interestingly, the header inside the power supply labeled "DC Option" is a 7-pin >header, so I'm not sure which pin was "optional" for the external connector!
>
>I'd just replace the power supply wholesale with a little ATX supply or something, but >the machine needs 5V, 12V, -12V, and 15V; the latter is used to power the CRT and >represents a real challenge! I've yet to find anything that outputs all 4 levels at a >reasonable price.
>
>john
>
I have an Otrona Attache 8:16 with the DC option, so it was sold. (I used both the Osborne and the Otrona in Peru, so having a battery option was an advantage.) However, my Attache has the disk drives that both spin up at the same time, and the DC option does not supply enough power to properly spin both drives, so the computer will reboot if you try to read or write anything to disk while on DC!
I’m traveling now, but will open up my Attache and take some pictures for you in a couple of weeks.
Bob
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 like to be able to :
Download disk images (I assume in .IMD or .TD0 format) and write them
to real floppy disks to use in my old machnes
If possble, for the more common filesystems like MS-DOS or CP/M, be
able to work with these images on the modern PC at the file level. For
example, if I download a CP/M progam as a .COM file I'd like to be
able to put it into a disk image of a Philips P2000C disk, then
transfer that image to a real floppy and put it in a drive on the
Philips machine.
I understand there are designed based on a modern microcontroller that
connecct to a USB port and a disk drive. Software on the PC translates
between the disk image and the accurately-timed pulses corresponding
to flux transitions on the disk. This unit links to a real disk drive,
you run the software and it reads/writes a real disk in said disk
drive.
Now... I can handle a 'scope. I can handle a logic analyser. I can
handle a soldering iron. I can handle an engineer's lathe. I can
rebuld and align floppy disk drives. I can program most 8-bit micros
along with PERQ microcode, PDP11 mahine code, etc BUT I don't have a
clue when it comes to modern PCs, modern microcontrollers or USB
ports.
So what I am asking is for people to describe what to do as in :
Buy this microcontroller board
Buy this blank PCB and solder the components given in the BOM to it.
Download this software and install it by doing this.
Connect a standard floppy drive to this connector
Run the software, specify the disk image file and sit back.
-tony
>>> Doubtful that VW Bug was on the Autobahn at the time, and, while the
>>> . . .
>>> Now, if the Bug had a trailer hitch, it could tow a trailer behind it with
>>> a gasoline or diesel powered generator with sufficient capacity to run
the PDP-8.
>> Are you suggesting some kind of, say, portable computer?
>> Runs, dodging and weaving.
> I'm not sure that you could fit a complete Model 33-ASR Teletype in the
> passenger seat of the Bug. I suppose if the Teletype was removed from
> its stand, it might be able to sit on the seat, and be powered by the
> same generator that runs the Straight-8.
It is truly easy to remove the passenger seat. Just unlatch the adjuster and
slide it forward off of the tracks. Then make brackets (out of the bottom of
an old seat) to mount the base of the teletype to the brackets.
I have known people who mounted equipment that way.
Many/most VW owners did not clean and lube the tracks, so it was often
difficult to slide the seat, and the latch spring did not re-engage. Ralph
Nader mis-represented that as "Of VWs in accidents, 60%? had the seat come off
of the track." The CORRECT statistic was, "Of VWs in accidents, IN WHICH THERE
WAS SEAT DAMAGE, 60%? were the seat came off of the track." Which was, while
still disconcerting and dangerous, trivial to repair by sliding it back on, and
cleaning and lubing the track and latch, with no other damage.
Removing the bottom of the back seat, and replacing it with a piece of plywood
also provides a roomier and more secure base for the payload.
Possibly even with enough room for a portable generator? (I don't know the
power requirements for the machine, but I do know that VW bugs are not very
amenable to trailering.)
Be careful about putting weight on the back seat! VW had the battery under the
back seat, and many owners did not have a cover over the battery to protect
against shorting by the seat springs!
A type 2 VW bus/van, preferably model 215 (with freight doors on both sides),
would be far more suitable. Or one with sunroof?
In some jurisdictions, the DMV would classify ones with any seats in addition
to the driver's seat, as "Station Wagon"!
To get commercial (lower cost) plates for my type 2 VW in Maryland, I had to
submit pictures showing that there were no other seats, and they even kicked
those back until I also included one showing that it did have a driver's seat.
> It'd be really hard to operate the machine while driving, for sure. It'd be
> far worse than messing with a smartphone while driving :-/. But, once
> stopped somewhere pleasant, you could
> actually develop programs using the punched tape reader/punch on the 33ASR.
> It'd definitely be
> an example of early "mobile computing". (Tongue firmly in cheek).
. . . and, if you caravaned/carpooled, other vehicles could carry peripherals.
No reason why we couldn't eventually have mobile computing!
--
Grumpy Ol' Fred cisin(a)xenosoft.com
