Search found 415 matches

by brightcaster
Thu Jun 24, 2021 8:00 pm
Forum: Dumping
Topic: Determine 8" Disk Format
Replies: 8
Views: 143

Re: Determine 8" Disk Format

You can dump it to an FM sector image with 26 sectors, 128 byte each, 77 tracks, double sided. But I can't find any details on the filesystem DOS68 used. So no tool for getting the files of that image so far. But you can look at the image with a hex/ascii editor as I did.

David
by brightcaster
Thu Jun 24, 2021 4:14 pm
Forum: Dumping
Topic: Determine 8" Disk Format
Replies: 8
Views: 143

Re: Determine 8" Disk Format

The Floppy contains some mbasic sourcecode for DOS68D v5.1 on this machine:

http://www.computercloset.org/SmokeSignalChieftain.htm

David
by brightcaster
Thu Jun 24, 2021 2:46 pm
Forum: Support
Topic: How to use the Kryoflux system to format a blank floppy disk ?
Replies: 5
Views: 63

Re: How to use the Kryoflux system to format a blank floppy disk ?

Can't you do the formatting on the fairlight itself? Some operating systems use unique identifiers (which are randomly set while formatting) to see a diskchange! If you just copy a formatted disk all your copies have the same identifier and therefore the OS will not see if you change the floppy. Tha...
by brightcaster
Wed Jun 23, 2021 6:24 pm
Forum: Dumping
Topic: Is this a normal dump?
Replies: 8
Views: 118

Re: Is this a normal dump?

If it's really misaligned you can't fix it without professional equipment and knowledge!

So I would look for another drive...

David
by brightcaster
Mon Jun 21, 2021 5:41 pm
Forum: Dumping
Topic: Is this a normal dump?
Replies: 8
Views: 118

Re: Is this a normal dump?

As the track IDs are correct it could also be a matter of a misalignment by plus one track on the HD drive you used for reading. I have attached a screenshot from the HxC-Tool with the odd tracks removed. Maybe its croostalk with an uncentric spindle... But as I said, the floppy was written with a s...
by brightcaster
Mon Jun 21, 2021 4:40 pm
Forum: Dumping
Topic: Is this a normal dump?
Replies: 8
Views: 118

Re: Is this a normal dump?

This is indeed a very weird floppy! All the even tracks are nothing but noise. All the odd tracks are written from a 360k image but shifted by one track plus double stepping! So this is very odd and was done with a standard floppy controller (no disk duplicator)! You can get a proper image by deleti...
by brightcaster
Mon Jun 21, 2021 9:44 am
Forum: Support
Topic: Must have floppy drives
Replies: 3
Views: 56

Re: Must have floppy drives

There are "horses for courses". Some drives are better with MFM (because of internal filters) while they read poor with GCR and vice versa...

David
by brightcaster
Mon Jun 21, 2021 9:14 am
Forum: Dumping
Topic: Is this a normal dump?
Replies: 8
Views: 118

Re: Is this a normal dump?

It's difficult to say that you did a setting wrong, if you don't share your setting ;-) If all the odd tracks are red it could be a 40 track floppy where you have to activate the double stepping in the gui to get a proper reading. But in this case all the even tracks are red, which could be a sign o...
by brightcaster
Fri Jun 18, 2021 3:28 pm
Forum: Support
Topic: reading and writing Osborne Executive disks
Replies: 6
Views: 100

Re: reading and writing Osborne Executive disks

Yes, it is definitaly 5 secotrs per track! Otherwise it would be high density!

5.25" is the diameter of the floppy, the tracks are a division of the radius minus some space before and behind the writeable area.

David
by brightcaster
Fri Jun 18, 2021 10:49 am
Forum: Support
Topic: reading and writing Osborne Executive disks
Replies: 6
Views: 100

Re: reading and writing Osborne Executive disks

First: You are right! I mixed it up with the osborne 1! You can call it either "SSSD 40Tracks, 10 Sectors, 256Byte, Standard FM" or "SSDD 40 Tracks, 5 Sectors, 1024Byte, MFM"! The difference is not the drive but the controller, which uses a different modulation to code the data o...