Disks and the Ghost Virus

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lottie1040
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Disks and the Ghost Virus

Postby lottie1040 » Tue Dec 01, 2015 11:24 pm

Hi all,
In my parents' house, I've got slightly over 100 floppy disks from the Atari ST I used to use growing up, in the mid-to-late '90s. Seeing as floppy disks don't last forever, I'd like to archive these and store them somewhere secure.

Unfortunately, thanks to some dodgy Public Domain disks we obtained, a lot of these disks (I'd go as far as to say most) are infected with the Ghost virus - you know, this one. What I was wondering was, when you make an image of an infected disk, does the boot sector get included in the image - and if so, is there an easy way to get rid of the virus? I noticed on that page that there was an assembly instruction to get rid of the virus, but I'm not sure how I'd go about implementing that... Thanks in advance for your help.

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Re: Disks and the Ghost Virus

Postby exxos » Tue Dec 01, 2015 11:38 pm

If you look here for "sagrotan" in the utils section, that writes a new boot sector.. There are probably loads of ways to cure it.. ECOPY I use can write a AV bootsector also, but its in German.. I'm sure others will have their own fav programs somewhere also :)

http://exxoshost.co.uk/atari/PDL/FLOPPYSHOP/
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Re: Disks and the Ghost Virus

Postby lottie1040 » Tue Dec 01, 2015 11:54 pm

exxos wrote:If you look here for "sagrotan" in the utils section, that writes a new boot sector.. There are probably loads of ways to cure it.. ECOPY I use can write a AV bootsector also, but its in German.. I'm sure others will have their own fav programs somewhere also :)

http://exxoshost.co.uk/atari/PDL/FLOPPYSHOP/

That sounds like the very thing! Would it be possible to run that on an emulator and have it rewrite the boot sector of a virtual floppy disk from there, or would it need to be done on an actual ST? (Sorry if it's a silly question...)

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Re: Disks and the Ghost Virus

Postby exxos » Wed Dec 02, 2015 12:01 am

lottie1040 wrote:That sounds like the very thing! Would it be possible to run that on an emulator and have it rewrite the boot sector of a virtual floppy disk from there, or would it need to be done on an actual ST? (Sorry if it's a silly question...)


AFAIK doing it on the ST is the only way. I don't think the emulators support direct to floppy drive access, though its not something I ever needed to do. Someone else may know some way on the PC to do it..

I think the ST would probably be quicker anyway. My ST can format a floppy in less time it takes my PC to open the floppy directory up :lol:
4MB STFM 1.44 FD- VELOCE+ 020 STE - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - various clutter

http://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
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Re: Disks and the Ghost Virus

Postby lottie1040 » Wed Dec 02, 2015 12:10 am

exxos wrote:
lottie1040 wrote:That sounds like the very thing! Would it be possible to run that on an emulator and have it rewrite the boot sector of a virtual floppy disk from there, or would it need to be done on an actual ST? (Sorry if it's a silly question...)


AFAIK doing it on the ST is the only way. I don't think the emulators support direct to floppy drive access, though its not something I ever needed to do. Someone else may know some way on the PC to do it..

I think the ST would probably be quicker anyway. My ST can format a floppy in less time it takes my PC to open the floppy directory up :lol:

Ah, OK - looks like I might have to convince my parents to let me rake around in the attic for the Atari ST, in that case! Here's hoping it's survived fifteen years of attic storage :) Thanks for your help!

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Re: Disks and the Ghost Virus

Postby exxos » Wed Dec 02, 2015 12:20 am

lottie1040 wrote:I think the ST would probably be quicker anyway. My ST can format a floppy in less time it takes my PC to open the floppy directory up :lol:

Ah, OK - looks like I might have to convince my parents to let me rake around in the attic for the Atari ST, in that case! Here's hoping it's survived fifteen years of attic storage :) Thanks for your help![/quote]

No worries, Welcome to the forum :)

Yes - get the ST out and get using that fantastic retro hardware!

Also just rescued this site which had vanished some time ago... http://www.uvk2000.exxoshost.co.uk/
4MB STFM 1.44 FD- VELOCE+ 020 STE - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - various clutter

http://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
http://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.
http://ataristeven.exxoshost.co.uk/Steem.htm Latest Steem Emulator

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Re: Disks and the Ghost Virus

Postby joska » Wed Dec 02, 2015 7:34 am

lottie1040 wrote:That sounds like the very thing! Would it be possible to run that on an emulator and have it rewrite the boot sector of a virtual floppy disk from there, or would it need to be done on an actual ST? (Sorry if it's a silly question...)


Yes, you can do this on the emulator. Make an image of the disk, mount the image as a floppy in the emulator and run the viruskiller.
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Re: Disks and the Ghost Virus

Postby troed » Wed Dec 02, 2015 10:30 am

exxos wrote:
lottie1040 wrote:AFAIK doing it on the ST is the only way. I don't think the emulators support direct to floppy drive access


They do :) And for boot sectors you'd only need to use TOS API calls anyway, but if you want to bitbang FDC/DMA that works just fine (many demos do)

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Re: Disks and the Ghost Virus

Postby exxos » Wed Dec 02, 2015 5:13 pm

Learn something new everyday :) So can steem access the A: drive on my PC then with all extended formats ?
4MB STFM 1.44 FD- VELOCE+ 020 STE - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - various clutter

http://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
http://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.
http://ataristeven.exxoshost.co.uk/Steem.htm Latest Steem Emulator

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Re: Disks and the Ghost Virus

Postby troed » Wed Dec 02, 2015 7:34 pm

exxos wrote:Learn something new everyday :) So can steem access the A: drive on my PC then with all extended formats ?


Hmm. The quote got truncated, the original question was about virtual disks (images):

lottie1040 wrote:That sounds like the very thing! Would it be possible to run that on an emulator and have it rewrite the boot sector of a virtual floppy disk from there, or would it need to be done on an actual ST? (Sorry if it's a silly question...)


... but even if we do talk about actual disk drives, as long as they're proper and not USB versions then FloImg can handle it: http://atari.8bitchip.info/floimgd.php

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Re: Disks and the Ghost Virus

Postby exxos » Wed Dec 02, 2015 7:40 pm

Yeah I know about FloImg , I used that before. That can make images and then transfer them to the emulator. Though I don't think this can be done directly with emulators.
4MB STFM 1.44 FD- VELOCE+ 020 STE - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - various clutter

http://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
http://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.
http://ataristeven.exxoshost.co.uk/Steem.htm Latest Steem Emulator


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