Search found 271 matches

by SomeGuy
Sun Jul 05, 2020 10:21 pm
Forum: Support
Topic: Texas DS990/1 Dump
Replies: 8
Views: 229

Re: Texas DS990/1 Dump

No "setting" is going to correct this issue. The drive is outputting lots of noise to the kryoflux. Dirty heads are one possibility. To me it almost looks like some kind of head alignment issue. It might help to tell us a little more about the drive(s) you are using. Is the drive you are reading fro...
by SomeGuy
Sun Jul 05, 2020 10:06 pm
Forum: Support
Topic: Unknown floppies
Replies: 1
Views: 33

Re: Unknown floppies

First of all, visually inspect the disk surfaces and clean any dirt or grime with a q-tip and water. Only consider alcohol if you don't see any oxide shedding. Dump the floppy disk using a preservation stream file. Always keep the first dump, as the disk may deteriorate as it is used. Then go back a...
by SomeGuy
Sat Jul 04, 2020 1:22 pm
Forum: Support
Topic: Texas DS990/1 Dump
Replies: 8
Views: 229

Re: Texas DS990/1 Dump

The specs you posted seem to suggest standard FM/MFM soft sectored encoding. So, if your originals were in very good condition, you could probably could just write the preservation stream back to a new disk. Note that preservation streams also preserve any "noise" present on a disk. I've found that ...
by SomeGuy
Thu Jun 25, 2020 2:14 pm
Forum: Dumping
Topic: Problems writing back to floppy disk
Replies: 13
Views: 323

Re: Problems writing back to floppy disk

Is there an existing Python module or library for interfacing with the raw files, or are you saying the format is simple enough to modify directly? Haven't had a chance to look at the file format but it does not sound too complicated. Is there a way to tell the kryoflux to start writing at someplace...
by SomeGuy
Wed Jun 10, 2020 6:50 pm
Forum: Support
Topic: Not working with one of my computers.
Replies: 6
Views: 210

Re: Not working with one of my computers.

The GUI shell does not include an option to write. Currently, this can only be done with the command line tool.

It is strange that it passes the calibrate test but then fails writing. Can this machine read and decode disks ok?

Make sure you have the same software versions on both computers.
by SomeGuy
Wed Jun 10, 2020 6:45 pm
Forum: General
Topic: Floppy disk/drive curiousities
Replies: 2
Views: 154

Re: Floppy disk/drive curiousities

Tracks beyond the last officially defined track, are a thing because the heads slide along rails, and there is no defined mechanism to tell the head where to stop. It just keeps going until it hits anything that makes it physically stop, and drive electronics don't try to prevent that. As such, diff...
by SomeGuy
Sun Jun 07, 2020 3:37 pm
Forum: Support
Topic: Oh dear, did I fry my KryoFlux?
Replies: 18
Views: 553

Re: Oh dear, did I fry my Kyroflux?

Later Samsungs SFD-321B contain four diodes like seen in this pictures: https://www.richis-lab.de/images/floppy/13.jpg https://www.richis-lab.de/images/floppy/11.jpg They are 1N118 from the stepper to GND. Without them the driver/controller of the stepper gets burst with intensive stepping sometime...
by SomeGuy
Fri May 22, 2020 11:45 pm
Forum: Dumping
Topic: Problems writing back to floppy disk
Replies: 13
Views: 323

Re: Problems writing back to floppy disk

Poked around in PCE and confirmed that is at least part of what is going on. It does a diagnostic read on the first sector of track 17 head 0, which reads the entire track plus part of a second revolution. Then it looks for some pattern just before the first sector on the second revolution, and if i...
by SomeGuy
Fri May 22, 2020 1:29 pm
Forum: General
Topic: TurboDOS 7.1 Preservation / dumping - help needed
Replies: 2
Views: 388

Re: TurboDOS 7.1 Preservation / dumping - help needed

First thing, inspect the surface of the disks and make sure they are clean and in OK condition before inserting in to a drive. If these are low (double) density 96 TPI disks, you will need to dump them using a "1.2mb" IBM PC style drive. When dumping make sure the kryoflux density line option is set...
by SomeGuy
Thu May 21, 2020 3:45 am
Forum: Dumping
Topic: Problems writing back to floppy disk
Replies: 13
Views: 323

Re: Problems writing back to floppy disk

I've been busy, but since I saw the post here I finally took a quick look at them. The "structure" of the protection on these disks looks the same as MusicPrinter Plus 1.1. I tried the commands listed on the winworld forum to try converting to a PSI file for PCE. Sideman D50 and Sequencer MKIII ran,...