Bad floppies :(

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Dominus
Posts: 30
Joined: Tue Mar 01, 2016 10:32 am

Re: Bad floppies :(

Post by Dominus » Thu Mar 10, 2016 12:05 pm

If you want to take a look, I'm finally able to send PMs :)

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IFW
Posts: 2634
Joined: Mon Nov 08, 2010 2:42 pm

Re: Bad floppies :(

Post by IFW » Thu Mar 10, 2016 12:54 pm

Yes, please.
Would be actually great if you could contribute to the SPS project.

spags
Posts: 90
Joined: Sun Sep 09, 2012 5:46 am
Location: Australia

Re: Bad floppies :(

Post by spags » Thu Mar 10, 2016 12:57 pm

Apple // formats for Kryoflux have been mentioned in another thread, where I gave my own recollections on the subject:
viewtopic.php?f=10&t=1021&p=9299&hilit=Apple#p9299

In my experience, most Apple // titles will dump from the Kryoflux using the 3.3 option like IFW has indicated. However I have only booted that title once in an emulator (to see where "it" all started) and for all I know it might have been copied/translated from the original format. Using your STREAM as source, try 3.3 first and if that doesn't work, try 3.2.

Dominus
Posts: 30
Joined: Tue Mar 01, 2016 10:32 am

Re: Bad floppies :(

Post by Dominus » Thu Mar 10, 2016 9:07 pm

Thanks spags, comparing it to the existing image of Ultima 1 http://www.filfre.net/2012/02/ultima-part-1/ it seems that I needed to use the "DSK, DOS 3.3 interleave" option to get an image that has the same size of the existing image (143.4KB) but seems the dump wasn't good only emptiness after the first few bytes...

Dominus
Posts: 30
Joined: Tue Mar 01, 2016 10:32 am

Re: Bad floppies :(

Post by Dominus » Fri Mar 11, 2016 5:43 pm

Hmm, interesting. After reimagining the Spanish Serpent Isle disks, I got much better results in some cases. One disk was even without errors now. The first one had much fewer errors and the sixth one, exact the same :)
kyroSI1.png

spags
Posts: 90
Joined: Sun Sep 09, 2012 5:46 am
Location: Australia

Re: Bad floppies :(

Post by spags » Fri Mar 11, 2016 9:09 pm

So that was after you gave everything a clean?

In regards to the Apple // formats, you should also search these forums for AGC (automatic gain control), as specifying this setting can make a significant difference to your dumping efforts.

Dominus
Posts: 30
Joined: Tue Mar 01, 2016 10:32 am

Re: Bad floppies :(

Post by Dominus » Fri Mar 11, 2016 10:48 pm

Actually I was putting my drive on the sides and am getting good results in some cases... without cleaning.

And that fixed all Spanish Serpent Isle floppies *except* one, but its down to one error track. Maybe I'll need to look for another floppy drive to test things further...

Dominus
Posts: 30
Joined: Tue Mar 01, 2016 10:32 am

Re: Bad floppies :(

Post by Dominus » Fri Mar 11, 2016 11:35 pm

As for the Ultima Apple II disk, I should have closely read the docs. It's a flippy disk, so... without a flippy modified floppy drive... :)

spags
Posts: 90
Joined: Sun Sep 09, 2012 5:46 am
Location: Australia

Re: Bad floppies :(

Post by spags » Sat Mar 12, 2016 2:06 am

Sideways! Although my drive maintenance skills really only go as far as head cleaning, I would suspect either a slightly loose head (causing it to be out of alignment unless gravity assists) or perhaps the (ribbon) cable from the head to the PCB may be slightly loose/out (or the equivalent from some other board-to-board cable).

Fortunately I have only ever had to deal with single-sided disks (and that's how I prefer to keep it), so I can't help you there.

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