On 07/04/2016 01:43 AM, pete wrote:
>
> Acorn formatter s/w doesn't write the optional "index mark" before the
> first sector so some PCs have trouble understanding Acorn disks.
>
If that's a problem on a PC (today it rarely is, but it was in the days
before the "A" revision of the 8272/765 cam
On 03/07/2016 00:51, Fred Cisin wrote:
On 07/02/2016 02:15 PM, Peter Coghlan wrote:
The original ADFS had 16 sectors of 256 bytes per track. However, it
appears that more recent ADFS formats use 5 sectors of 1024 bytes.
There are more details here:
http://mdfs.net/Docs/Comp/Disk/Format/Formats
On Sat, Jul 2, 2016 at 10:15 PM, Peter Coghlan
wrote:
>
>> Is the capacity of the diskette 800K? or is that merely the name of the
>> type of the diskette, with an actual capacity of somewhere between 640K and
>> 800K?
>>
>> If the actual capacity is 800K, with MFM, then it would probably be 80
>
On Jul 2, 2016, at 2:38 PM, Chuck Guzis wrote:
> Since I don't have an Acorn, I'm a bit in the dark about all of this
> talk about Kyroflux. Wouldn't it be simpler to use a legacy PC floppy
> controller?
Indeed ImageDisk works just fine to read and write every standard
(non-copy-protected) AD
On Sat, 2 Jul 2016, Peter Coghlan wrote:
The original ADFS had 16 sectors of 256 bytes per track. However, it appears
that more recent ADFS formats use 5 sectors of 1024 bytes. There are more
details here:
http://mdfs.net/Docs/Comp/Disk/Format/Formats
Thank you!
Note: the use of the term "qu
On the porch looking at your cabinet and my chair.
Thanks.
- Original Message -
From: "Chuck Guzis"
To: "General Discussion: On-Topic and Off-Topic Posts"
Sent: Saturday, July 02, 2016 5:38 PM
Subject: Re: Disc Imaging / Kryoflux - Acorn ADFS 800KB
> On 07/
On 07/02/2016 02:15 PM, Peter Coghlan wrote:
The original ADFS had 16 sectors of 256 bytes per track. However, it
appears that more recent ADFS formats use 5 sectors of 1024 bytes.
There are more details here:
http://mdfs.net/Docs/Comp/Disk/Format/Formats
. . . and the "F" and "F+" would requir
On 07/02/2016 02:15 PM, Peter Coghlan wrote:
>
> The original ADFS had 16 sectors of 256 bytes per track. However, it
> appears that more recent ADFS formats use 5 sectors of 1024 bytes.
> There are more details here:
>
> http://mdfs.net/Docs/Comp/Disk/Format/Formats
Since I don't have an Acor
Is the capacity of the diskette 800K? or is that merely the name of the
type of the diskette, with an actual capacity of somewhere between 640K
and 800K?
If the actual capacity is 800K, with MFM, then it would probably be 80
track, double sided, with either 10 512 byte sectors or 5 1024 byte
On 2 July 2016 at 20:58, Austin Pass wrote:
> Thanks Liam.
>
> Although in this particular instance I have a high degree of confidence
> that the use of a VM (Parallels on an iMac running 10.11) and Windows 8.1
> isn't the root of my problems.
I still wouldn't trust it for something as hardware-
On Sat, 2 Jul 2016, Austin Pass wrote:
Thanks for the feedback Fred.
The Kryoflux Forums are admin-approval-only and I've been waiting a couple
of days for that to happen.
To the best of my own knowledge it's a pretty standard MFM, as the
computers featured the Western Digital 1770 and 1772 contr
On Sat, Jul 2, 2016 at 3:01 PM, Liam Proven wrote:
> On 1 July 2016 at 22:28, Austin Pass wrote:
> > I've hooked it all up to a Windows 8.1 VM
>
>
> A *VM*?
>
> Oh, come on. Be serious. If you're troubleshooting hardware, use
> hardware. No blasted VMs. I'm amazed anything worked at all via a VM
I'm coming to the same conclusion - command line the way to go!
Dumping the flux transitions (the "raw" mode your describe) certainly
produces data, but I'm in the same boat when it comes to using DTC to put
it in a readable image format.
-Austin
On Sat, Jul 2, 2016 at 3:06 AM, Jason T wrote:
Thanks for the feedback Fred.
The Kryoflux Forums are admin-approval-only and I've been waiting a couple
of days for that to happen.
To the best of my own knowledge it's a pretty standard MFM, as the
computers featured the Western Digital 1770 and 1772 controllers.
The specific discs I'm trying
On 1 July 2016 at 22:28, Austin Pass wrote:
> I've hooked it all up to a Windows 8.1 VM
A *VM*?
Oh, come on. Be serious. If you're troubleshooting hardware, use
hardware. No blasted VMs. I'm amazed anything worked at all via a VM.
Also, 8.1 is relatively speaking obsolete and unpopular. I'd su
On Fri, 1 Jul 2016, Austin Pass wrote:
I'm trying to preserve my Acorn ADFS 3.5" discs. To this end, I've
purchased a KryoFlux "Pro" board and a new-old-stock ALPS floppy drive.
I've hooked it all up to a Windows 8.1 VM and everything *seems* to be
working. However, the .adl images I create are
On Fri, Jul 1, 2016 at 3:28 PM, Austin Pass wrote:
> I'm trying to preserve my Acorn ADFS 3.5" discs. To this end, I've purchased
> a KryoFlux "Pro" board and a new-old-stock ALPS floppy drive.
>
> I've hooked it all up to a Windows 8.1 VM and everything *seems* to be
> working. However, the .a
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