Search found 87 matches

by SomeGuy
Tue Feb 21, 2017 4:11 am
Forum: Dumping
Topic: 128K/180K PC 5.25" Floppys.
Replies: 9
Views: 292

Re: 128K/180K PC 5.25" Floppys.

World Games appears copy protected, and contains an intentionally "bad" sector on the first track. This means you will not be able to create a usable IMG file. You also appear to have dumped that disk in a 360k drive, but incorrectly specified to dump 80 tracks. It appears to be a "booter" with a no...
by SomeGuy
Sun Feb 19, 2017 2:48 pm
Forum: Dumping
Topic: 128K/180K PC 5.25" Floppys.
Replies: 9
Views: 292

Re: 128K/180K PC 5.25" Floppys.

128k? The standard formats on IBM PC low-density MFM 5.25" disks are: 160k (Single Sided Double Density, 8 sectors per track, DOS 1.0) 320K (Double Sided Double Density, 8 sectors per track, DOS 1.1) 180k (Single Sided Double Density, 9 sectors per track, DOS 2.0) 360K (Double Sided Double Density, ...
by SomeGuy
Sat Feb 18, 2017 1:12 am
Forum: Support
Topic: Will KryoFlux help me? Will I be able to use this device?
Replies: 4
Views: 137

Re: Will KryoFlux help me? Will I be able to use this device?

From what you describe, any cheap USB 1.44mb floppy drive with Windows 10 should be able to read those disks. I have a bad feeling that a Kryoflux may only show the disks have somehow become blank or damaged in some non-visible way. Anyway, the basics are not that hard. Just hook up the kryoflux wit...
by SomeGuy
Wed Feb 15, 2017 3:47 pm
Forum: Support
Topic: MFM Scatter Issue Identification
Replies: 4
Views: 116

Re: MFM Scatter Issue Identification

Ok, so it is a high density disk. That also means in all probability it is IBM PC 1.2mb formatted (15 sectors, 512 byte sectors, 80 tracks, double sided, MFM encoding) So set the KF to decode MFM, and make sure the "density line" menu option is set to "low" (density line low means high density on mo...
by SomeGuy
Wed Feb 15, 2017 6:16 am
Forum: Support
Topic: Will KryoFlux help me? Will I be able to use this device?
Replies: 4
Views: 137

Re: Will KryoFlux help me? Will I be able to use this device?

If you can find someone in your area with a Kryoflux, you may want to consider sending the disks to them. The Kryoflux and its software is powerful but can be a bit complicated. It is not as easy as dragging and dropping files. But if you feel up to it, the Kryoflux is indeed becoming a standard way...
by SomeGuy
Wed Feb 15, 2017 5:49 am
Forum: Support
Topic: MFM Scatter Issue Identification
Replies: 4
Views: 116

Re: MFM Scatter Issue Identification

Unfortunately, a scatter plot only tells a small part of the story. That suggests you have a disk with 15 sectors per track. And the first one looks like there might be damage on one sector. The last one sort of suggests empty sectors. Just from screen shots, I can't even tell if it is high or low d...
by SomeGuy
Mon Jan 23, 2017 2:57 am
Forum: Dumping
Topic: Apple II disk Grrr.....
Replies: 24
Views: 541

Re: Apple II disk Grrr.....

It is not possible to convert copy protected stream files to DSK images. DSK files only contain the contents of each sector and assume a perfect normal 140k disk. You would have to crack the software and remove all protection first. Likely that is what the image you found is, an unprotected version....
by SomeGuy
Sun Jan 22, 2017 4:51 pm
Forum: Dumping
Topic: Apple II disk Grrr.....
Replies: 24
Views: 541

Re: Apple II disk Grrr.....

Try making just a Preservation stream dump, and feed it to the HxC disk tool. (See the "HxCFloppyEmulator software" Download link here: http://hxc2001.free.fr/floppy_drive_emulator/ ) I've seen many cases where the Kroflux software will fail to decode a disk image, yet other tools will happily succe...
by SomeGuy
Mon Jan 16, 2017 6:26 pm
Forum: Support
Topic: How to write back Atari 8-Bit Disk?
Replies: 6
Views: 221

Re: How to write back Atari 8-Bit Disk?

Here are atr2imd and imd2atr binaries for DOS from Joe's Atari Disk Tools. https://github.com/jhallen/atari-tools

No idea why they don't post their own binaries there.
by SomeGuy
Wed Jan 11, 2017 10:45 pm
Forum: Support
Topic: How to write back Atari 8-Bit Disk?
Replies: 6
Views: 221

Re: How to write back Atari 8-Bit Disk?

The Kryoflux currently does not know how to successfully write a track where the data crosses the index. Unfortunately, Atari 400/800 disk drives did not use an index, so unless the disk was mastered on a professional duplicator, then the track starts will be all over the place. Since you have the a...