Search found 5 matches

by Videogamer555
Tue Nov 17, 2020 12:43 am
Forum: Software Development
Topic: Need sample Kryoflux raw stream files
Replies: 1
Views: 77

Need sample Kryoflux raw stream files

I'd like to try to write a a program that reads raw kryoflux stream files ans can then interpret the flux reversals into bits, and write a standard .IMG floppy disk image file from that. While documentation is available for the file format, I don't have any sample raw flux stream file to test my sof...
by Videogamer555
Mon Nov 16, 2020 10:37 pm
Forum: Support
Topic: copy-protected 3,5" DOS Floppies & Kryoflux
Replies: 18
Views: 3670

Re: copy-protected 3,5" DOS Floppies & Kryoflux

Interesting topic. Can Kryoflux actually write weak bits on a disk (basically demagnetize those bits)? I read the PDF documentation for the raw stream specification (which is just a set of commands sent to the device), and it seems the data blocks simply specify the timing between magnetic polarity ...
by Videogamer555
Mon Nov 16, 2020 10:30 pm
Forum: Dumping
Topic: What kind of copyright does the 1991 Lemmings disk use?
Replies: 6
Views: 98

Re: What kind of copyright does the 1991 Lemmings disk use?

If it can be read in the second or later attempt, it must be a different copy protection. Weak, flaky or fuzzy bits will produce errors! BTW: Did you see this: https://forum.kryoflux.com/viewtopic.php?t=1091 https://www.dosbox.com/comp_list.php?showID=382&letter=L What kind of copy protection w...
by Videogamer555
Mon Nov 16, 2020 11:20 am
Forum: Dumping
Topic: What kind of copyright does the 1991 Lemmings disk use?
Replies: 6
Views: 98

Re: What kind of copyright does the 1991 Lemmings disk use?

Sectors with weak bits get a crc error by design because you allways get different data and the checksum will never fit! So this sectors will show up bad and therefor can't be read with the usual routines... The OS itself can only read sectors which are valid, otherwise it does some retries and aft...
by Videogamer555
Mon Nov 16, 2020 9:00 am
Forum: Dumping
Topic: What kind of copyright does the 1991 Lemmings disk use?
Replies: 6
Views: 98

What kind of copyright does the 1991 Lemmings disk use?

I have the Lemmings (1991 version, I think this is the original) PC game on 3.5 inch floppy. Using it with my normal USB floppy drive (I don't have a KryoFlux) I notice I can access the disk in normal Windows explorer, and even copy files to my harddrive with no problem. The problem comes when I try...