Dumping Dual Format 5.25" Disks

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ZrX
Posts: 245
Joined: Tue Dec 06, 2011 9:09 pm

Re: Dumping Dual Format 5.25" Disks

Post by ZrX » Mon May 30, 2016 10:32 pm

Interesting disk that is. I have absolutely no idea how Atari finds the tracks/sectors and accesses the data. :)

Most platforms have a directory and/or boot data at the first track...
MercenaryTheSecondCity.png

BarryB
Posts: 263
Joined: Thu Aug 02, 2012 8:15 pm

Re: Dumping Dual Format 5.25" Disks

Post by BarryB » Mon May 30, 2016 11:23 pm

Maybe the Atari version was programmed to only access the tracks where the data was stored, so it didn't need a directory putting on the disk!

ZrX
Posts: 245
Joined: Tue Dec 06, 2011 9:09 pm

Re: Dumping Dual Format 5.25" Disks

Post by ZrX » Mon May 30, 2016 11:40 pm

Still, it somehow needs to know where to look for.

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

Re: Dumping Dual Format 5.25" Disks

Post by IFW » Tue May 31, 2016 1:42 pm

A fixed track/sector position ;)

ZrX
Posts: 245
Joined: Tue Dec 06, 2011 9:09 pm

Re: Dumping Dual Format 5.25" Disks

Post by ZrX » Tue May 31, 2016 2:55 pm

Would assume the disk would boot from the first track and the code would then tell to move to such arbitrary position. But the outer tracks only have a single header on empty tracks.

ZrX
Posts: 245
Joined: Tue Dec 06, 2011 9:09 pm

Re: Dumping Dual Format 5.25" Disks

Post by ZrX » Tue May 31, 2016 3:39 pm

Hrm, should've checked. It's just an expansion disk to the game.

BarryB
Posts: 263
Joined: Thu Aug 02, 2012 8:15 pm

Re: Dumping Dual Format 5.25" Disks

Post by BarryB » Tue May 31, 2016 11:23 pm

Lol, yes, a New Dataset as the cover says! So, you can pre-program to only look at a certain position on the disk as IFW says!!

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