As far as RX02 formatted 8-inch floppies go, I have some original DEC
RT-11 V05.01 RX02 format distribution floppies which I managed to dump
to disk images a few years ago. I forget exactly how I did it now.
It was either with a real DEC RX02 drive and an M8029 RXV21 controller
in a Q-Bus PDP-11 s
On Sat, 6 May 2017, Terry Stewart via cctalk wrote:
?Anadisk tells me the disks are Single Sided, Single Density.
It can see ID marks as it tracks a disk but that is all. It can't see
any data.
Could be an RX02 disk as people say
Oh, and sector size is 128 bytes.
Well, yes and no.
th
On Fri, 5 May 2017, Chuck Guzis via cctalk wrote:
I didn't mean what I think you thought I meant.
correct
I apologize
The immediate problem
is getting data--any data at all. If you can retrieve every sector on
the disk, then it's just a matter of software to unravel the filesystem.
DEC files
ct: Re: RE: Extracting files off “unknown” 8 inch disks. Any thoughts…
On Fri, 5 May 2017, Bill Gunshannon via cctalk wrote:
> But I thought the problem was that most disk controllers can't do RX02.
> Everybody doesn't have a Catweasel or Cryoflux.
That's right.
Chuck's su
> Terry is doing it for fun; we can't expect the others to.
On Fri, 5 May 2017, Bill Gunshannon via cctalk wrote:
I would. :-) Or maybe for beer.
I doubt that Allison will want to underbid THAT!
On Fri, 5 May 2017, Bill Gunshannon via cctalk wrote:
But I thought the problem was that most disk controllers can't do RX02.
Everybody doesn't have a Catweasel or Cryoflux.
That's right.
Chuck's suggestion would require that somebody who has a
flux-transition device (Catweasel, Kryoflux, Cent
: Extracting files off “unknown” 8 inch disks. Any thoughts…
>> Not really, in the event they would like them read and we know they
>> are RX02 there are a number of people here who likely could read them
>> (myself being one of them!)
On Fri, 5 May 2017, Chuck Guzis via cctalk wrote:
Not really, in the event they would like them read and we know they
are RX02 there are a number of people here who likely could read them
(myself being one of them!)
On Fri, 5 May 2017, Chuck Guzis via cctalk wrote:
Just image them sector-by-sector and let folks fool with the images.
The filesy
>First if they are DEC its one of two formats either FM aka RX01 or FM2
>aka RX02.
>(..an in-depth explanation)
>How do I know. I have PDP-8, PDP11 (with RX02) and VAX (qbus uVAX,
>uVAX2000, and 3100 family).
>I used to and still do exchange between RT-11 and CP/M using RX01 mode
>and a CP/M utili
Thank you!
Now, the question will be whether Allison has some free time to check them
out for Terry.
Experience always beats speculation:
On Thu, 4 May 2017, allison wrote:
First if they are DEC its one of two formats either FM aka RX01 or FM2
aka RX02.
RX01 base format is 128byte sectors
On May 4, 2017 3:30 PM, "Terry Stewart via cctalk"
wrote:
>Using IMD, or other tools, can you determine the density, bytes per
sector, and sectors per track of the disks (try at least 2)
>Also, is the data recorded single sided, or both sides?
>If you can read it with IMD, then you can start wad
>Is your 8 inch setup capable of FM/single density?
>I think that Dave has a utility to test that.
Yes, quite capable. It passes Dave's test and I have read/written in
single density when archiving other stuff. Archiving my FM/single density
POLY and Panasonic stuff was no problem.
http://www.cl
On Fri, 5 May 2017, Terry Stewart via cctalk wrote:
Yes, reading them with IMD was one of the first things I tried. Couldn't
do it at all. Tons of errors, no tracks could be read. IMD didn't
recognise the layout at all.
All the disks I tried were like this.
Then, either it is impossible to r
>Does your system handle single density? (some FDCs do; some don't)
Oh, yes it does.
>Using IMD, or other tools, can you determine the density, bytes per
sector, and sectors per track of the disks (try at least 2)
>Also, is the data recorded single sided, or both sides?
>If you can read it with IMD, then you can start wading through content
within sectors to get more clues about w
On Fri, 5 May 2017, Terry Stewart via cctalk wrote:
They may be CP/M, or some other format entirely.
It turns out these disks are from a VAX machine. Assuming the OS is VMS, I
scoured the Internet for something that might read them.
I don't know anything.but, I will point out a few things
On Mon, 17 Apr 2017, Chuck Guzis via cctalk wrote:
WinNT/2K/XP will read Japanese PC98 MS-DOS 1024*8*2*77, but I don't know
if it'll format that particular format (never tried).
Doubtful on FORMAT, since that is working from a very short list of
choices, but reading (and hence writing) can be
>>It may also be that is just doesn't support 77 and can only do 80 tracks.
>I don't think it is this. I can format it fine with 77 tracks using 22DSK
and IMD. It has no problem reading or >writing to 77 track formatted disks.
Oh sorry Dwight, I thought you meant the drive here. You mean MS-DO
On Tue, 18 Apr 2017, dwight via cctalk wrote:
Some times it reads part of the disk. I don't know what it is looking at
but it won't format over some types of original data. I've often erased
with supper magnet to get past such stuff.
That really got silly when they added "UNFORMAT"!
It may a
>Let's start with determining the hardware aspects to see whether Terry's
machines are capable of reading the disks.
Yes, this is the first step for me. Last night I pulled out an MS-DOS 486
that seems capable. It can read/write single density according to TESTFDC.
This is the machine I'll use.
From: cctalk [cctalk-boun...@classiccmp.org] on behalf of Fred Cisin via cctalk
[cctalk@classiccmp.org]
Sent: Thursday, March 23, 2017 10:38 AM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: RE: Extracting files off “unknown” 8 inch
On Thu, 23 Mar 2017, Bill Gunshannon via cctalk wrote:
Let's not forget UCSD-Pascal or RT-11. :-) Lot's of formats, some easier to
recover than others.
Let's start with determining the hardware aspects to see whether Terry's
machines are capable of reading the disks.
Deciphering the file sy
: Fred Cisin; General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Re: Extracting files off “unknown” 8 inch disks. Any thoughts…
Thanks Guys,
Now I'm intimidated (-:
Just kiddingthat's useful stuff Fred. Thanks for taking the time to
type all that out.
I'll give it
Thanks Guys,
Now I'm intimidated (-:
Just kiddingthat's useful stuff Fred. Thanks for taking the time to
type all that out.
I'll give it a go...and see what I can see. If anything it's a good excuse
for me to wire the drive up. I'd like to image those Panasonic disks one
day for posterity
Once you've got sectors, speak up, and we'll give you more things to
look at.
On Wed, 22 Mar 2017, Chuck Guzis via cctalk wrote:
Fred, how about the image of a Compugraphic typesetter floppy I have?
It uses Hebrew for its code set.
Feel up to it?
Nope.
You're much better at it than I am.
I wa
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