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Amiga computer related discussion => Amiga Gaming => Topic started by: Sektor on August 05, 2016, 05:22:40 AM

Title: can you write a copy protected ADF to disk?
Post by: Sektor on August 05, 2016, 05:22:40 AM

Just curious can you write the original copy protected ADF back to disk?

Leander (UK) (Disk 1) (1991) [Original] (Psygnosis) (MFM 'VERY' Long tracks).adf is 2,313,388 bytes, so not your standard 880k.  I tried using adf-blitzer and tsgui to write the image on a real amiga but it's not bootable.  The adf works fine on emulators.

I have the original PAL disks but disk 1 isn't booting, it would be nice if I could fix the original, sometimes the disks just need a rewrite but other times it's more serious.

Title: Re: can you write a copy protected ADF to disk?
Post by: omnicron10 on August 05, 2016, 07:35:09 AM

You might want to try XFS or something to mount the disk as a virtual floppy, then use a OS supported nibbler to copy that file to dfx: (aka real floppy disk).

http://aminet.net/package/disk/misc/xfs

Maybe flash copy
http://aminet.net/package/disk/misc/FlashCopy

I haven't tried this before but it might work.  

I have also read

"EADF is missing the additional information needed for this, e.g. missing definition of the proper track splice point etc. EADF also does not support density changes, something used pretty often"

So it might be that the disk just does not have the information to be written back to disk properly.

EADF is the ADF format that supports long tracks.

Source : http://forum.kryoflux.com/viewtopic.php?t=627

Title: Re: can you write a copy protected ADF to disk?
Post by: polyp2000 on August 05, 2016, 07:40:56 AM

Quote from: omnicron10;812112

So it might be that the disk just does not have the information to be written back to disk properly.

Id concur with this , if the disk was copy protected in some way there's a pretty strong chance that creating the ADF file wont have circumvented this.
After all thats what copy protection is for.

Title: Re: can you write a copy protected ADF to disk?
Post by: Sektor on August 05, 2016, 02:37:40 PM

The ADF works fine in emulators, so the copy protection data must be in the image unless the emulator has some special workaround.  It still might not be possible to write it with an Amiga drive but I'll try your suggestions on blank disks, I won't experiment with the original until I know it works.

Title: Re: can you write a copy protected ADF to disk?
Post by: psxphill on August 06, 2016, 04:35:52 PM

Quote from: Sektor;812110

Leander (UK) (Disk 1) (1991) [Original] (Psygnosis) (MFM 'VERY' Long tracks).adf is 2,313,388 bytes, so not your standard 880k.  I tried using adf-blitzer and tsgui to write the image on a real amiga but it's not bootable.  The adf works fine on emulators.

Supposedly it's an extended adf and you'd be better off trying to get an ipf.

http://forum.kryoflux.com/viewtopic.php?t=1072

Title: Re: can you write a copy protected ADF to disk?
Post by: Sektor on August 07, 2016, 08:06:51 AM

So first I need to find out if you can do a successful disk to disk copy using nibble or track sync on a real unmodified Amiga.

If that is possible then copying from a perfect image should be possible, just need the right software.  There doesn't appear to be any that directly support writing from IPS or EADF but some can write from dev.  I need to figure out how to mount/convert an IPS to dev (amiga.device?).