The simplest thing, if you can locate one, is to find a WD1000/WD1001
controller board and hook it to a PC. Chances are overwhelming that it
was used to write the SA100x in the first place.
My first 5150 hard drive used such a setup--an SA1002, a WD1001 and a
very small hand-wired ISA card for i
On 2/3/21 5:59 PM, Fred Cisin via cctalk wrote:
> He humbly acknowledged things that he didn't know, actively solicited
> comments and suggestions, and compiled a really nice collection of some
> of the weird formats. (including a link to Chuck's F85 page)
I didn't ever send him an F85 diskette,
On Wed, Feb 03, 2021 at 10:43:48AM +0100, Enrico email.it wrote:
>
>
> A very dear friend first read in raw mode a 10MB Winchester hard disk model
> Shugard SA1004 from which the files were correctly extracted and then set up
> a test bench from which you can see in this video the complete system
On Wednesday, February 3, 2021 at 9:25, ED SHARPE via cctech wrote:
> Indeed this site is great for reference but alas are too lo-res for good
> museum display images.
They appear to be scanned at 150 dpi.
The ones here are scanned at 300 dpi:
http://hparchive.com/hp_journals
I remember how annoying it was when Ebay required all payments through
paypal. I preferred checks and getting all the money.
With Ebay's cut plus I am sure the new payment cut will be above
Paypal's it becomes less and less interesting to sell things there. But
that's what happens when you hav
On 2/3/21 1:57 PM, Al Kossow via cctech wrote:
On 2/3/21 1:29 PM, Michael Thompson via cctech wrote:
The RICM would happily accept any donated FlipChips
Almost everything sold yesterday.
and I won't go into how disgusted I am with eBay's new seller payment system
they forced everyone into
On 2/3/21 1:29 PM, Michael Thompson via cctech wrote:
The RICM would happily accept any donated FlipChips
Almost everything sold yesterday.
>
>
> Date: Tue, 2 Feb 2021 09:19:08 -0800
> From: Al Kossow
> Subject: Flip-Chip selloff
>
> I don't have any equipment that uses them any more, so I'll be ebaying off
> my
> A-W series flip chips over the next few days. The W's and PT08 boards are
> up now
>
> https://www.ebay.com/itm/1846474768
On Tue, Feb 2, 2021 at 12:30 AM Josh Dersch wrote:
>
>
> On Sun, Jan 31, 2021 at 10:03 PM Fritz Mueller wrote:
>
>>
>>
>> > On Jan 31, 2021, at 8:19 PM, Josh Dersch wrote:
>> > Well, what's interesting here is that on my system, switch S4 (MAINT
>> STPR) steps the processor with switches S1 and
You're absolutely correct, however the only thing Al contributes (for
the purposes of this particular discussion) are complaints about how
other people are doing it wrong.
On Wed, 3 Feb 2021, Chris Hanson via cctalk wrote:
I think Al has contributed enormously to the archival and preservation
On Wed, 3 Feb 2021, Fred Cisin via cctalk wrote:
. . .
Then try cylinder 36.
If the disk had been written on a 48tpi 35 track drive (SA400/SA390 used on
TRS80 and Apple), then cylinder 72 of a 96tpi/cylinder 36 of 48tpi would not
have been used. If cylinder 72 does not read, but 36 gives a va
ideally, you'd use a 96tpi drive on 48tpi and microstep the head
positioner. you still have the problem of head clog.
Some "stupid ideas":
In line with trying to minimize possible damage during analysis of the
format, try:
Use a 96tpi drive.
Try to read cylinder 72. MOST OS's are aware
a much larger and more expensive solution.
Does it matter?
Do you buy Chinese junk tools as well?
It isn't like you're going to buy 100 or even 10 of the things.
If you are just starting out at this, and didn't collect a stash of
old floppy drives you're going to spend a lot more on the dri
> On Feb 3, 2021, at 5:37 PM, Peter Corlett via cctalk
> wrote:
>
> On Wed, Feb 03, 2021 at 01:09:50AM -0800, jim stephens via cctalk wrote:
>> On 2/2/2021 11:51 PM, Peter Corlett via cctalk wrote:
>>> The Raspberry Pi Pico has a similar price to the Blue Pill and seems a
>>> much better mach
He offers everything from the $15 bare board up. Next step up is doing
the surface mount chips for you at $3.50, etc.
I'd do the bare board. I can attest that the mfm emulator will work.
I've not one the SA-1000 might have to work with him to do it
yourself. I recall he offered a kit o
Antonio said
> On 03/02/2021 22:22, John Foust via cctalk wrote:
>> At 04:01 PM 2/3/2021, you wrote:
>>> and I won't go into how disgusted I am with eBay's new seller payment system
>>> they forced everyone into on the first of the month.
>> A few months ago I sold on eBay some servers and NAS stuf
On 03/02/2021 22:22, John Foust via cctalk wrote:
At 04:01 PM 2/3/2021, you wrote:
and I won't go into how disgusted I am with eBay's new seller payment system
they forced everyone into on the first of the month.
A few months ago I sold on eBay some servers and NAS stuff for a client.
I thought
On Wed, Feb 03, 2021 at 01:09:50AM -0800, jim stephens via cctalk wrote:
> On 2/2/2021 11:51 PM, Peter Corlett via cctalk wrote:
>> The Raspberry Pi Pico has a similar price to the Blue Pill and seems a
>> much better machine for this task, although I haven't combed through its
>> reference manual
On Wed, Feb 3, 2021 at 3:20 PM John Foust via cctalk
wrote:
> At 03:37 PM 2/3/2021, Chuck Guzis via cctalk wrote:
> >"Reasonably quickly" is a relative term. I've got samples here that I
> >had to cogitate over for a year.
> >Admittedly, these were items that were sui generis, but "quickly" was
At 04:01 PM 2/3/2021, you wrote:
>and I won't go into how disgusted I am with eBay's new seller payment system
>they forced everyone into on the first of the month.
A few months ago I sold on eBay some servers and NAS stuff for a client.
I thought it would be easy to see the detailed financial bre
At 03:37 PM 2/3/2021, Chuck Guzis via cctalk wrote:
>"Reasonably quickly" is a relative term. I've got samples here that I
>had to cogitate over for a year.
>Admittedly, these were items that were sui generis, but "quickly" was
>not in the picture.
Well, there's the balance between novice norma
On Tue, Feb 02, 2021 at 08:50:56PM -0700, ben via cctalk wrote:
> On 2/1/2021 6:07 AM, Peter Corlett via cctalk wrote:
[...]
>> You're describing a failing in C and similar languages stuck in the
>> 1960s. Here's a Rust method that does add-exposing-carry:
>> https://doc.rust-lang.org/nightly/std/
On 2/3/21 1:00 PM, John Foust via cctalk wrote:
>
> What I'm hearing is that these microcontroller standalone devices
> don't give any feedback on the reading process. Couldn't they be more
> tightly coupled to a PC so the raw data could be displayed immediately
> and analyzed reasonably quickly?
On 2/3/21 12:31 PM, Chris Hanson wrote:
tools from project hosting sites like SourceForge, Bitbucket, GitLab, and
Github a close second.
Some people tried to get a technical Greaseweasel discussion going on their
github, and it is slowly
being adopted after a whole lot of nothing initially.
Adam, I have a VAXstation sitting about three metres from me. As is
usually the case, "it worked when I turned it off 20 years ago" I don't
remember how many years ago I turned it off. I think it is a model 30
but casually looking at the box does not show me what model it is. I
pulled out the n
What I'm hearing is that these microcontroller standalone devices
don't give any feedback on the reading process. Couldn't they be more
tightly coupled to a PC so the raw data could be displayed immediately
and analyzed reasonably quickly? Certainly they could send all
the samples over USB quit
On 2021-02-03 15:29, Adam Thornton via cctalk wrote:
> As long as we’re talking about divesting: if anyone has a VaxStation that
> they’d sell me for substantially less than eBay prices, I’d be interested. I
> have a 3100M38, but it doesn’t POST; indeed, a replacement mainboard would be
> a pla
On Feb 2, 2021, at 7:58 AM, geneb via cctalk wrote:
>
> You're absolutely correct, however the only thing Al contributes (for the
> purposes of this particular discussion) are complaints about how other people
> are doing it wrong.
I think Al has contributed enormously to the archival and pres
As long as we’re talking about divesting: if anyone has a VaxStation that
they’d sell me for substantially less than eBay prices, I’d be interested. I
have a 3100M38, but it doesn’t POST; indeed, a replacement mainboard would be a
place I could start. (I did try burning new ROMs and replacing
I have received a few of the above-mentioned DC300-sized QIC carts for
recovery. The usual stuff about tension bands applies, but I'm a bit
stymied.
The official specs for these tapes say that they're SLR 3. I've tried
Tandberg SLR 3, 4 and 5 drives (any of which should be able to read
these) w
I'll add just a bit with respect to floppy disks on an MCU.
One reason to put histogram and peak-detection in the MCU firmware is
that for a disk you never know how far out of alignment the original
(recording) drive might be. A drive used to record something out of
alignment can yield garbage on
On 2/3/21 10:34 AM, Paul Koning wrote:
Which might mean either (a) what I suggested is in practice not needed, or (b)
existing software treats as unrecoverable disks that could be recovered with
more sophisticated tools. I have no idea which is correct.
More sophisticated tools aren't neede
> On Feb 3, 2021, at 1:27 PM, Al Kossow wrote:
>
> On 2/3/21 10:18 AM, Paul Koning wrote:
>
>> Fair enough, but that means your real time processing needs to be sufficient
>> to know where the tracks are. And if the media are in bad shape, you may in
>> fact want to capture each track N ti
On 2/3/21 10:18 AM, Paul Koning wrote:
Fair enough, but that means your real time processing needs to be sufficient to
know where the tracks are. And if the media are in bad shape, you may in fact
want to capture each track N times at slight offsets from the nominal position,
then do signal
On 2/3/21 10:17 AM, Mattis Lind wrote:
I have been looking into designing a 12 bit A/D with a differential amplifier in front which would sample at 6, 12 or 24 Mhz delivering the
raw samples to the host over USB (FX2LP chips are good at pumping USB data). In this way I have all the info I can ge
> On Feb 3, 2021, at 12:55 PM, Al Kossow via cctalk
> wrote:
>
> On 2/3/21 9:43 AM, Paul Koning via cctalk wrote:
>
>> A nice benefit of capturing the raw waveforms and post-processing them is
>> that you can do all sorts of very complex processing. If the media are nice
>> and clean then
Den ons 3 feb. 2021 kl 18:55 skrev Al Kossow via cctalk <
cctalk@classiccmp.org>:
> On 2/3/21 9:43 AM, Paul Koning via cctalk wrote:
>
> > A nice benefit of capturing the raw waveforms and post-processing them
> is that you can do all sorts of very complex processing. If the media are
> nice and
On 2/3/21 9:36 AM, Mattis Lind wrote:
> So you store a full track worth of data and then write it to the
> SD-card. Then move the flux-length data over to a PC and do post
> processing there, right?
>
> Isn't there performance in the CPU to do the actual decoding as well?
> FM, MFM, GCR or whatev
On 2/3/21 9:55 AM, Al Kossow via cctalk wrote:
In the real world, this is fundamentally wrong.
You need to know you haven't captured garbage while the disk is still in the
drive
and you want to minimize the time you spend dwelling on an individual track.
When you are recovering a batch of hu
On 2/3/21 9:43 AM, Paul Koning via cctalk wrote:
A nice benefit of capturing the raw waveforms and post-processing them is that
you can do all sorts of very complex processing. If the media are nice and
clean then simple processing is sufficient. If they are badly damaged, you may
need more
> On Feb 3, 2021, at 12:36 PM, Mattis Lind via cctalk
> wrote:
>
>> ...
>
> So you store a full track worth of data and then write it to the SD-card.
> Then move the flux-length data over to a PC and do post processing there,
> right?
>
> Isn't there performance in the CPU to do the actual
Den ons 3 feb. 2021 kl 18:00 skrev Chuck Guzis via cctalk <
cctalk@classiccmp.org>:
> On 2/3/21 7:14 AM, dwight via cctalk wrote:
> > I'm curious as to how the sampling code looks. Do you use the timers?
> > Dwight
>
> Exactly. You run the sample timer in "capture" mode using DMA. There's
> a li
On 2/3/21 7:14 AM, dwight via cctalk wrote:
> I'm curious as to how the sampling code looks. Do you use the timers?
> Dwight
Exactly. You run the sample timer in "capture" mode using DMA. There's
a little trick in this when handling high-denisty fisks in thatthe DMA
counter is limited to 65K "it
On Tue, Feb 2, 2021 at 12:19 PM Al Kossow via cctalk
wrote:
> I don't have any equipment that uses them any more, so I'll be ebaying off my
> A-W series flip chips over the next few days. The W's and PT08 boards are up
> now
>
> https://www.ebay.com/itm/184647476832
> https://www.ebay.com/itm/184
I'm curious as to how the sampling code looks. Do you use the timers?
Dwight
From: cctalk on behalf of Mattis Lind via
cctalk
Sent: Wednesday, February 3, 2021 5:01 AM
To: Al Kossow ; General Discussion: On-Topic and Off-Topic
Posts
Subject: Re: Greaseweazle
On Tue, Feb 02, 2021 at 07:10:14PM -0800, Christopher Zach wrote:
> I've had 30+ years to acquire this "stuff". :-)
I turned 65 last year ...
mcl
I suspect many of us are in similar situations. I have been collecting and
storing
my treasures for about 35 years. I even recently moved it all into one nice
climate
controlled space. (It has mostly all been in climate controlled space, but now
it
is all in the same space with room to work on i
> On Feb 3, 2021, at 9:53 AM, Mattis Lind wrote:
>
> Den ons 3 feb. 2021 kl 15:07 skrev Paul Koning via cctalk
> :
>
> ...
>> I haven't used RPi at all, since when I looked at it some years ago the SOC
>> technical information was secret. Contrast the BeagleBone, for which there
>> is a 50
Den ons 3 feb. 2021 kl 15:07 skrev Paul Koning via cctalk <
cctalk@classiccmp.org>:
>
>
> > On Feb 3, 2021, at 2:51 AM, Peter Corlett via cctalk <
> cctalk@classiccmp.org> wrote:
> >
> > On Tue, Feb 02, 2021 at 09:20:01AM -0800, Chuck Guzis via cctalk wrote:
> > [...]
> >> When I last proposed the
It's a bit very expensive to shipping a SA-1000 from U.S. to Italy
almost over than 200 USD
-Messaggio originale-
Da: cctech [mailto:cctech-boun...@classiccmp.org] Per conto di jim stephens
via cctech
Inviato: mercoledì 3 febbraio 2021 12:18
A: Enrico email.it via cctalk
Oggetto: R
> On Feb 3, 2021, at 2:51 AM, Peter Corlett via cctalk
> wrote:
>
> On Tue, Feb 02, 2021 at 09:20:01AM -0800, Chuck Guzis via cctalk wrote:
> [...]
>> When I last proposed the STM32F407, I was met with "Oh, but the Blue Pill
>> is cheaper". Okay, use the Blue Pill, but my code won't work with
Den ons 3 feb. 2021 kl 13:25 skrev Al Kossow via cctalk <
cctalk@classiccmp.org>:
> On 2/2/21 11:51 PM, Peter Corlett via cctalk wrote:
>
> > I have a pile of Blue Pill boards, and using it to read floppies was an
> > obvious application. However after running the numbers, it turned out
> there
>
On 2/2/21 11:51 PM, Peter Corlett via cctalk wrote:
I have a pile of Blue Pill boards, and using it to read floppies was an
obvious application. However after running the numbers, it turned out there
isn't enough RAM to buffer an entire track from a HD floppy. It also has a
broken USB implementa
On 2/3/2021 1:43 AM, Enrico email.it via cctalk wrote:
Any suggestion?
I believe Dave G's MFM emulator has an option to support the SA1000.
I have one in stock for a future project to try to extract data from
SA-1000's in DSD floppy / 8" drive subsystems.
https://www.pdp8.net/mfm/mfm.shtm
On Tue, 2 Feb 2021, Al Kossow wrote:
Copy protection is just a pain in the ass.
A tiny, tiny fraction of what I work with has any and
I'm very happy it is mostly used on consumer computers
which are being archived by others so I don't have to.
:-))
This is also my attitude. I just don't care a
On Tue, 2 Feb 2021, Al Kossow wrote:
Do you make these available online?
I found your version of IMD here
ftp://computermuseum.informatik.uni-stuttgart.de/utils
not under source control.
Ups, I see that this is a very old version. I'll update this with my
current version and I'll write some
Correct addess of the video test:
https://www.dropbox.com/s/d9iacfgrnexso3o/GP%20T20%20con%20HD%20banco%20prov
a.mp4?dl=0
The email cuts the link address to the video file. please join the first
with the second piece and paste it in your browser.
Enrico
Hello everyone,
in Italy in 1981 there was an explosion in creating new machines following
the introduction of microprocessors.
I have several "General Processor T-Model" machines that used CP / M 2.2
operating system.
Here you can see the photos of the 1st acquisition
https://www.vintagesbc.i
Indeed this site is great for reference but alas are too lo-res for good museum
display images.
I do use this as a reference source but need paper copies sometimes to hi res
scan some times!
Ed#
On Tuesday, February 2, 2021 Richard Milward via cctalk
wrote:
You can find HP Journal issues
On 2/2/2021 11:51 PM, Peter Corlett via cctalk wrote:
The Raspberry Pi Pico has a similar price to the Blue Pill and seems a much
better machine for this task, although I haven't combed through its
reference manual yet.
For capture and writing (if that's part of the design) I heard there's a
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