STX to real disk

Post all your Kryoflux related topics in here. From questions about the hardware through to disks you've managed to image up and, probably most importantly, write back without any problems :)

Moderators: mr.vince, DrCoolZic, Moderator Team

Post Reply
TXG/MNX
Captain Atari
Captain Atari
Posts: 239
Joined: Fri Oct 24, 2003 10:05 am

STX to real disk

Post by TXG/MNX »

Hi,

|Is there someone who succesfully converted STX to hfe ? HxC2001 software seems to have the option but my greazeweasle writes it to disk but then the protection is broken and the program doesnot work maybe a kyroflux user can try it.
User avatar
kodak80
Atari Super Hero
Atari Super Hero
Posts: 818
Joined: Sat Nov 09, 2013 12:05 am
Location: Brisbane, Australia
Contact:

Re: STX to real disk

Post by kodak80 »

TXG/MNX wrote: Tue Dec 21, 2021 11:54 am Hi,

|Is there someone who succesfully converted STX to hfe ? HxC2001 software seems to have the option but my greazeweasle writes it to disk but then the protection is broken and the program doesnot work maybe a kyroflux user can try it.
As mentioned in the other post, Pasti STX were for us in software emulator and do not contain all disk protection data. Some work, some don't when converting for use on a floppy disk.

You need a raw flux level disk dump (Kryoflux or Supercard Pro) of the original disk to be able to write back to a floppy disk.
Creator of the ST Action & Atari ST Review magazine archive: https://chillichai.com
ijor
Hardware Guru
Hardware Guru
Posts: 4243
Joined: Sat May 29, 2004 7:52 pm
Contact:

Re: STX to real disk

Post by ijor »

TXG/MNX wrote: Tue Dec 21, 2021 11:54 am |Is there someone who succesfully converted STX to hfe ? HxC2001 software seems to have the option but my greazeweasle writes it to disk but then the protection is broken and the program doesnot work maybe a kyroflux user can try it.
Once again, it depends on the specific image and protection. It would help if you would post a flux level image of your own disk to be able to perform a more accurate analysis of the protection (assuming it's the same for both versions).
kodak80 wrote: Tue Dec 21, 2021 8:42 pm As mentioned in the other post, Pasti STX were for us in software emulator and do not contain all disk protection data.
That's not accurate. The Pasti image has (or at least, it should have) all the copy protection, at least as far as it is needed, otherwise the image would not work.

The problem is that a Pasti image has the data as it was already processed by the FDC. This is because that's how Pasti originally reads the disk, and also because that's the most efficient way for the emulators to process. To be able to write back to disk you need the data before the FDC processing. And because of some quirks of the WD FDC, the conversion from post to pre FDC processing is not trivial at all in some cases.
Fx Cast: Atari St cycle accurate fpga core
User avatar
kodak80
Atari Super Hero
Atari Super Hero
Posts: 818
Joined: Sat Nov 09, 2013 12:05 am
Location: Brisbane, Australia
Contact:

Re: STX to real disk

Post by kodak80 »

ijor wrote: Tue Dec 21, 2021 11:18 pm
kodak80 wrote: Tue Dec 21, 2021 8:42 pm As mentioned in the other post, Pasti STX were for us in software emulator and do not contain all disk protection data.
That's not accurate. The Pasti image has (or at least, it should have) all the copy protection, at least as far as it is needed, otherwise the image would not work.

The problem is that a Pasti image has the data as it was already processed by the FDC. This is because that's how Pasti originally reads the disk, and also because that's the most efficient way for the emulators to process. To be able to write back to disk you need the data before the FDC processing. And because of some quirks of the WD FDC, the conversion from post to pre FDC processing is not trivial at all in some cases.
Thanks for confirming this. I learnt something today about the Pasti disk format. :)
Creator of the ST Action & Atari ST Review magazine archive: https://chillichai.com
User avatar
DrCoolZic
Fuji Shaped Bastard
Fuji Shaped Bastard
Posts: 2267
Joined: Mon Oct 03, 2005 7:03 pm
Location: France
Contact:

Re: STX to real disk

Post by DrCoolZic »

If I remember correctly there is only one protection that can't be written in Pasti format (I think it is fuzzy bits between sectors?). Apart from this very specific case, yes Pasti format can handle all protections. Thanks to the work done by Ijor :mrgreen:
Pasti images can be generated directly from fluxes retrieved with KF or SC. But even without using a FDC the fluxes read by KF/FC are far from being perfect... Therefore writing a protected FD from a Pasti image has a high chance of not working.
Long ago I started to write a module inside Aufit to recover perfect image from flux for FD with known protections (something similar to the work done with IPF by SPS) ... but never finished it. Who knows may be I will find some time to complete the work :)
Post Reply

Return to “Kryoflux”