Search found 272 matches

by SomeGuy
Fri Dec 13, 2019 1:41 am
Forum: General
Topic: IBM PC disk-based copy protection schemes and games
Replies: 8
Views: 823

Re: IBM PC disk-based copy protection schemes and games

Could you name any specific ones? One that comes to mind is VTERM II because it was so simplistic. All they did was write a compleatly normal format to the 41st track. The program checks for it and refuses to start if it is not present. Some other protected titles are in the "IBM Personally Develop...
by SomeGuy
Tue Dec 10, 2019 6:57 pm
Forum: General
Topic: IBM PC disk-based copy protection schemes and games
Replies: 8
Views: 823

Re: IBM PC disk-based copy protection schemes and games

What, no productivity applications? Many, many, early titles did rely on simplistic custom copy protection methods. it would be great to know which tools and software/hardware combinations are most suitable for every specific type of CP method e. g. Teledisk, Transcopy, Kryoflux, Supercard Pro, etc ...
by SomeGuy
Sun Nov 24, 2019 11:45 am
Forum: Dumping
Topic: Alley Cat Booter problems
Replies: 5
Views: 287

Re: Alley Cat Booter problems

Personally, I find it easier just to write low density images using a genuine 360k drive. It is possible to convert a copy of an existing KF stream dump that was made using a 1.2mb drive by deleting the odd number tracks and renaming the remaining ones so they are consecutive. Even though the tracks...
by SomeGuy
Sun Nov 24, 2019 5:49 am
Forum: Dumping
Topic: Alley Cat Booter problems
Replies: 5
Views: 287

Re: Alley Cat Booter problems

Did you perhaps write it using a 1.2mb drive and try reading it in a 360k drive? That won't work reliably. You either need to write the disk in a 360k drive, or degauss the floppy first.
by SomeGuy
Sat Nov 23, 2019 12:05 am
Forum: General
Topic: Need advice on how to recover 5.25" floppy
Replies: 63
Views: 6064

Re: Need advice on how to recover 5.25" floppy

That is a 1.2mb (96tpi/80track high density) floppy disk. You must read it using a 1.2mb 5.25" floppy drive. It will not read in a 360k (48tpi/40track low density) drive.
by SomeGuy
Tue Nov 05, 2019 12:04 pm
Forum: General
Topic: Need advice on how to recover 5.25" floppy
Replies: 63
Views: 6064

Re: Need advice on how to recover 5.25" floppy

Most "360k" floppy drives have issues reading GCR encoding. Your best bet at reading them is probably a "1.2mb" Teac drive. Of course, it is difficult to reliably write 48tpi (360k) images in a 96tpi (1.2mb) drive and KF does not support writing non-index aligned streams. But for reading and archivi...
by SomeGuy
Wed Oct 30, 2019 11:37 pm
Forum: Support
Topic: Errors Attempting To Write Stream Files
Replies: 27
Views: 1173

Re: Errors Attempting To Write Stream Files

Interesting. My suspicion is that there is some electrical problem with the Mac Pro 2011, or what you were powering the drive along with it. That would explain the noise seen in the images. Not that long ago I had an issue with a failing capacitor on a video card. The entire machine worked fine, but...
by SomeGuy
Tue Oct 29, 2019 12:08 am
Forum: Support
Topic: Errors Attempting To Write Stream Files
Replies: 27
Views: 1173

Re: Errors Attempting To Write Stream Files

I'm a little baffled. The posted stream is useless noise. If it were me, I'd do some additional testing between this older PC and the Kryoflux drive to ensure things are really working 100%. If this older PC can write these kinds of disk, then there is little reason why the KF would not read somethi...
by SomeGuy
Mon Oct 28, 2019 11:44 pm
Forum: Support
Topic: POLL: Problems KryoFlux under MacOS
Replies: 18
Views: 1310

Re: POLL: Problems KryoFlux under MacOS

I think the main problem here is the devteam don't see us Mac users important enough or too few to fix the problem. I think the main problem here is that APPLE doesn't see Mac users as important enough. As I understand it, the problem is an OS bug that Apple refuses to fix, and the KF team would ha...
by SomeGuy
Fri Oct 25, 2019 2:15 am
Forum: Support
Topic: Old CNC system floppy copying
Replies: 18
Views: 816

Re: Old CNC system floppy copying

when I tried to look on freshly written disks by reading it with MFM sector imaging there were only errors and bad sectors shown apart from that of original disks The kryoflux decoder is pickier about accuracy than a real floppy controller. That does suggest that the quality of the original disk wa...