On Sat, 2022-04-30 at 12:00 -0500, cctalk-requ...@classiccmp.org wrote:
> cleaning up edge connectors
I started a religious war about 20 years ago on this list with this,
but here goes: ;-)
I like Pink Pearl erasers (rubbers in English). The Pink Pearl has a
titch of abrasiveness, which helps re
I just received my UKNC from what was Czechoslovakia. Made in 1990 it
was dirty but otherwise in good shape. I need to install an alternate
power supply as the Soviet one requires 220volts and has a wierd plug.
Anyone know where one can find a disk interface for this machine? I
have such for se
There's a nice, working PDP 11/23 with 20 meg hdd and 1meg (!!) of ram,
with terminal screens indicating full operation. The asking price is
$900.00, but I imagine the fellow might negotiate. Shipping is gonna
be a fair penny.
best,
Jeff
Those sound like ram chip 4116, quite common once, and still available.
I have a couple dozen tested ones handy if you want them. (From Atari
800 16k ram modules). 250ns to 350ns, depending.
best,
Jeff
On Tue, 2020-10-27 at 12:00 -0500, cctalk-requ...@classiccmp.org wrote:
> Re: Next project
I've not worked on 8" floppy drives, but have on tons of 5.25" single-
sided drives. Older single-sided ones (usually 35-track from the 70's)
had load solenoids for the pressure pads, as with a double-sided unit.
The pad is to provide good contact between the media surface and the
head beneath.
My Sunblade works fine with a generic USB keyboard, but does not
recognize the Type 7 USB keyboard I bought for it. OpenBoot prom
reports "no keyboard detected". If I boot with my generic keyboard
plugged in and then plug in the type 7, it sees it fine in OpenBSD. It
is the openboot prom that do
I don't have a way to make plastic new, but I've had good results with
WD40 for restoring surfaces with WD40. Some plastics get dusty and
highly ablative on the surface with age and environment. Plastic LOVES
WD40, if it is 'thirsty' Coat the plastic with WD40, and wait. It
will soak in, someti
I have a Sunblade 100, got it on ebay for $103.00, landed on my
doorstep. I hacked the nvram chip with a pair of AA batteries, which
should keep the thing going for a hundred years.
I really wanted a STOP key, and found an ad on Ebay for new Type 7 usb
keyboard/mouse, bought the set.
I used a pl
It is apparently true. He had heart troubles, but this was unexpected
and certainly a shock to his family.
I met Curt here, on Classiccmp, about twenty years ago. We are both
hardcore Atari 8-bit computer geeks, but we met in this forum.
He is missed by many as he touched many. Please pray f
I decided to get a tvga8900 for mine, as fiddling with 15khz ttl is
just too flaky and problemmatic. Having a real cga/ega monitor would
be cool if I could justify the cost and the space, but a native fix is
an isa vga card so that's my solution. I'm refurbing a 5170 for use as
an imaging tool, I
I've got a Morrow Microdecision 3 on the bench and gather it often
shipped with the MD-60 terminal, but for the life of me I can't find
what emulation that terminal uses.
Lacking the native terminal, what emulation should I be using?
Thanks!
Jeff
On Fri, 2020-01-03 at 12:00 -0600, cctalk-requ...@classiccmp.org wrote:
> On 1/2/2020 1:35 PM, Cameron Kaiser via cctalk wrote:
> > > > Anyone done anything with Netware *for PowerPC*? Allegedly
> > > > there was
> > > > some attempt at Apple to put it on what later became the
> > > > Network Serve
On Mon, 2019-12-23 at 12:00 -0600, cctalk-requ...@classiccmp.org wrote:
> Re: First Internet message and ...
I read the caselaw in the GUI war cases of the 80's. Microsoft and
apple were battling over features and everyone else was being weighed.
There are nice comparative tables, TOS/GEM vs OS/
I've got a thoroughly tested and working Canon Mdd210 5.25" floppy
mechanism here. I don't need such a special mech, any 360k drive would
do. If you want this particular mechanism for some reason, just let me
know and we can arrange a trade for a more ordinary one.
Best,
Jeff
This link was posted on an Atari forum. I noticed a PDP 8 faceplate, a
UNIVAC keyboard, and some other seriously retro parts. Might want to
Hit this link:
https://docs.google.com/document/d/1-n9AUXZAiVw0nvht-JhD4IN8DMZWrAW7YCsS7gvFaP8/edit?fbclid=IwAR0t9_X5i_qC_k0lRZUvNyRLBXi98wn-MCBF6gT7lX1qR
I am in the middle of refurbishing two drive controllers, a Percom At88
with doubler board, and a Percom At-88SPD. Neither has mechs and my
search for them has been frustrating. The mechs are like hens teeth
online, and when I find them they are insanely expensive.
I know there's gotta be a pile
A fellow who was putting the air in "Microsoft Tire" (c) is going to
prison. Microsoft claims that the air they give free with the tire is
not free. You can download the air and install the air and use the
air, but noone can help you do it or they will spend 15months in
federal prison and pay 3/4
Message: 4
Date: Thu, 5 Sep 2019 10:03:54 -0400
From: "Craig M."
To: cctalk@classiccmp.org
Subject: ROLM - Dat general 1602 - AN/UYK-19 computers.
Message-ID:
<
CAD1aQJ5FnQDS7i+iLeh-+zBSBrzaqV9-f61Q76XgEbz=fsn...@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
Good Morning,
ch is also very important.
Best,
Jeff
On Fri, 2019-08-02 at 13:06 -0500, Eric Christopherson wrote:
> On Fri, Aug 2, 2019 at 12:39 PM Jeffrey S. Worley via cctalk <
> cctalk@classiccmp.org> wrote:
> > I'm building as many as ten of a 512k Axlon compatible memory board
> >
I'm building as many as ten of a 512k Axlon compatible memory board for
the Atari 800 (not xl) computer. If you'd like to have one, please
message me and let me know so I can reserve one for you.
I'm not sure of my cost at the moment, but it is something on the order
of $30.00 per board. I'll to
On Wed, 2019-07-24 at 21:24 -0400, Pete Rittwage wrote:
I did some lookup on the reflow temperatures for various solder
materials because my gut told me 250 degrees is too low to do any good.
Turns out this is so. 250 CELCIUS maybe, but Fahrenheit? not.
https://www.google.com/search?q=melting+p
Does this mean that, like me scratching a bit at the package to expose
enough nub of broken-off pin to get a blob of solder on to hold a new
leg made of wire can theoretically be extended to shaving off the top
of the package to expose the IC and then tack soldering the severed
wire back onto it?
Yesterday evening, in the process of refurbishing five very badly
treated Atari 800 computers I had a hunch and subjected a failed Pokey
chip (Atari Part CO12294 Wikki link https://en.wikipedia.org/wiki/POKEY
) to high heat by way of the barrel of my soldering iron until
saliva evaporated from
On Sat, 2019-06-15 at 12:00 -0500, cctalk-requ...@classiccmp.org wrote:
>
> The hard disk seems to be stuck or the drives electronics are broken,
> it
> does not spin up. As these drives are quite rare, I'm looking for the
> SCSI card (Model 6lX700l). Is it right, the PC-RT can boot off SCSI?
>
> > On Fri, 2019-02-15 at 12:00 -0600, cctalk-requ...@classiccmp.org wrote:> >
> > as
These hardware wizard stories remind me of a legendary repair wizard,
> non-computer industrial devices I think. He was called in to fix a
> tricky problem at the customer site. Studied it for a while, took
>
Of all machines I've used, the beloved Atari 8-bit is most vocal. It
has the feature of 'i/o noise' by default. It can be disabled with a
Poke, but every kind of io has distinctive sounds and actually
represents the data being sent/received. If you disable it and crank
the volume on your TV, you
I got a laugh out of this anecdote. Of course, folks heard me chuckle
and I tried to share the joke but Way too geeky for public
consumption.
Back in 2000-ish, I was upgrading my DG MV4000/dc to 8mb so as to be
able to run the snazzy AOS/VS II tapes I'd got along with the 9 track
drive I hac
On Fri, 2019-02-08 at 12:00 -0600, cctalk-requ...@classiccmp.org wrote:
> Re: Looking for: 68000 C compilers
There is a GNU OS for the Atari 68k-based ST, TT, and Falcon computers
which might be fun to play with. It is called MiNT. FreeMiNT and
SpareMiNT are two distros. They are available. Ar
On Sun, 2019-01-06 at 11:08 -0800, Josh Dersch wrote:
> That's a good trick, given that the K5 came out in 1996 and the K6 in
> 1997, the FDIV issue blew up in late 1994.
Memory is like that. The FDIV bug didn't go away because it was
announced, the chips stayed on desktops and our diagnostic sof
What defines a 'modern processor'. The term is pretty slippery.
The Crusoe used microcode to emulate x86 and could therefore emulate
any processor architecture Transmeta wanted.
Crusoe was a pioneer in the low power market, the processor dynamically
clocked itself in very small steps depending o
On Sat, 2019-01-05 at 12:00 -0600, cctalk-requ...@classiccmp.org wrote:
> Re: Microcode, which is a no-go for modern designs
I was a tech in the 90's when the original Pentium FDIV bug was
storming. The issue was confined to the integrated floating point
portion of the processor and was therefore
AM Fritz Mueller via cctalk
> wrote:
>
> > > ? Try using the drive on the other bus if RSTS can be
> > > booted of from DK4.
> >
> > Easy enough experiment to try; would need to re-jumper the G740
> > disk selection flip chip in the RK11-C too
On Sun, 2019-01-06 at 12:00 -0600, cctalk-requ...@classiccmp.org wrote:
> Re: off topic - capatob - saratov2 computer Russsian pdp8
Nothing has changed as regards the number of bits in a byte, a nybble
is 4 bits, 8 to the byte, and x to the word - this last varies widely
depending on architecture.
Apropos of nothing, I've been confuse for some time regarding maximum
clock rates for local bus.
My admittedly old information, which comes from the 3rd ed. of "High
Performance Computer Architecture", a course I audited, indicates a
maximum speed on the order of 1ghz for very very short trace len
Yes. Sunos 5.4, Solaris 2.4. I got and installed Solaris 2.6 to
replace that, iirc. I also ran Netbsd and OpenBsd on that machine,
preferring OpenBSD, iirc the video drivers worked best on the
frambuffer I had which was the base model color board. This all
happened in the year 2000 or thereabou
The Sparcstation 4/330 I reworked the NVRAM chip on
I got it as-is from Computer Parts Barn in Asheville, NC. It was just
round the corner from my home in Oakley..
The machine wouldn't start due to NVRAM, which I fixed. It then
actually booted from the original drives, had an OS and data on
The re-work of that Dallas nvram chip is just beautiful. It makes me
ashamed of myself. (I just chopped into the epoxy with a pocket knife,
soldered two leads, and velcroed the new batteries somewhere inside the
machine I installed it in.)
I salute you sir.
Jeff
When I bought that Sparcstation 4/330 at Computer Parts Barn, the 48T02
was one of the problems with it. The chip looks like a piggieback rom
encapsulated in epoxy.
I was not reinventing the wheel at the time, I think, because it was
the year 2000 or so, but I looked for a replacement and found t
I had a Sparcstation 4/330 with optical mouse, without the pad. Of
course I wanted one, and eventually found one, but in the interim, I
did what an old hack suggested and printed myself a grid on paper.
Works peachy. The spacing of the grid will determine the tracking
speed of the mouse. Graph
I got into the Data General scene in the late 1990's, when I received
an Eclipse as a gift from a client who no longer needed it.
In my search for docs, software, and other information I met some
interesting people. One was in the Navy in the 1980's in data
processing. He recounted to me:
I was
This was circulating in 1995/6. IBM had been shipping the very good
OS/2 for some years and Microsoft was trying to catch up. Someone did
a very nice parody.
Jeff
*The Legend of the Pea Sea*
Long ago, in the days when all disks flopped in the breeze and the
writing of words was on a sta
I used OS/2 from 1993 to 2003 almost exclusively. It has the most
beautiful GUI on the planet, is object-oriented to a fault, and is the
target of all the claims Microsoft was making with regard to the
Object-orientedness of their new windows 95.
Wikipedia https://en.wikipedia.org/wiki/Workplace_
Probably preaching to the choir, but if you are going to be mounting an
old tape, there are some issues to be aware of.
Tape is really stable over time and your data is likely still there.
As tapes age, the surface of the gluey oxide coating degrades. The
symptoms will be very discernable with a
I recall the SAGE was an integrated system of control for Interceptors.
It began in the 1950's and became fully operational with the
F106 fighter interceptor aircraft. It could control an entire
intercept from wheels up to flare on landing. I never thought I'd SEE
a chunk of the system.
Data General made a nifty and flexible terminal called "Walkabout". It
had 32kb of internal memory one could use to take notes on the move. It
ran on a 12volt wall wart which charged an onboard nicad battery.
The lcd screen is not backlit but it was useable in most any light.
The sliders on the
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