Alignment Disk
#4
1) Unless you understand disk format you probably won't be able to tell if a disk was created using the index mark, but you could look at an image file that was made with bind mode on in the analyzer. Load the image and increment each track one by one. You will notice a series of AA's or 55's, following by a sync (44894489). This could be shifted by a 1-3 bits though. It will be pretty obvious if the disk was written with the index pulse as the start of the write data. For disks that weren't, you won't see the 55's or AA's, you will see random data for each track.

2) There were hundreds of types of protection. SuperCard Pro doesn't care about protection, it just cares about the raw flux data. In order to duplicate disks that were not written on the index mark, you have to read two revoutions and locate where the original writing started on the 2nd revolution and use that as the end of the data written. It's not too difficult, but there are a lot of cases to provide code for.
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Messages In This Thread
Alignment Disk - by videofx - 12-24-2013, 08:31 PM
RE: Alignment Disk - by admin - 12-24-2013, 11:49 PM
RE: Alignment Disk - by videofx - 12-25-2013, 07:44 AM
RE: Alignment Disk - by admin - 12-25-2013, 11:03 AM
RE: Alignment Disk - by videofx - 12-25-2013, 12:51 PM
RE: Alignment Disk - by admin - 12-25-2013, 02:49 PM



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