How to write back Atari 8-Bit Disk?

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castlewolfenstein
Posts: 4
Joined: Fri Jan 06, 2017 10:53 am

How to write back Atari 8-Bit Disk?

Post by castlewolfenstein » Sat Jan 07, 2017 4:41 pm

With the help of a atariage thread and a flippy modded Panasonic JU-475-4 drive i generated some dumps.
with the tool a8rawconv I generated atx files and they are working with altirra emulator :-)

I used:

1. Get or modify a 5.25in drive to support flippy mode (otherwise you're out of luck, do a sector copy using a real Atari drive)

2. Kyroflux: dtc -p -f[DiskName]\track_ -g2 -y -i0 -i2 -k2 -b-8
3. ATR side A: a8rawconv [DiskName]\track_00.0.raw [DiskNameA].atr
4. ATR side B: a8rawconv -r [DiskName]\track_00.1.raw [DiskNameB].atr

But how can I write the dump back to a real Disk?

Please help
Thanks

castlewolfenstein
Posts: 4
Joined: Fri Jan 06, 2017 10:53 am

Re: How to write back Atari 8-Bit Disk?

Post by castlewolfenstein » Wed Jan 11, 2017 4:04 pm

Any hint for me?
Thanks

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

Re: How to write back Atari 8-Bit Disk?

Post by ZrX » Wed Jan 11, 2017 7:38 pm

dtc -b-8 -ftrack_ -w should do it. But if either side was not originally aligned to the index signal that side will most likely fail.

SomeGuy
Posts: 87
Joined: Wed Feb 18, 2015 8:18 pm

Re: How to write back Atari 8-Bit Disk?

Post by SomeGuy » Wed Jan 11, 2017 10:45 pm

The Kryoflux currently does not know how to successfully write a track where the data crosses the index. Unfortunately, Atari 400/800 disk drives did not use an index, so unless the disk was mastered on a professional duplicator, then the track starts will be all over the place.

Since you have the atr files, if the disk in question is not copy protected, what I would try is convert the .atr file to .imd using the tool "atr2imd", and then just write each .imd file to each side of the disk. (You will need a flippy with an index hole in each side). An IMD can be written with a DOS PC, or converted to a fresh index-aligned kryoflux stream file using the HXC tools.

castlewolfenstein
Posts: 4
Joined: Fri Jan 06, 2017 10:53 am

Re: How to write back Atari 8-Bit Disk?

Post by castlewolfenstein » Mon Jan 16, 2017 3:30 pm

thanks for the answer.
I tried to do it with the rawcommand

dtc -b-8 -f\[DiskName]\track_ -w

and it loads some sectors but hangs.

Can somebody sent me a dos compiled version of atr2imd?
I want to try it this way.

Is there a way to write atr, or atx directly with dtc?

thanks for the help

castlewolfenstein
Posts: 4
Joined: Fri Jan 06, 2017 10:53 am

Re: How to write back Atari 8-Bit Disk?

Post by castlewolfenstein » Mon Jan 16, 2017 3:43 pm

I have a modded flippy drive panasonic JU-475-4AKO
It has one opto inside for the index hole.
which drive have two optos inside? Is my panasonic the wrong one for this job?

SomeGuy
Posts: 87
Joined: Wed Feb 18, 2015 8:18 pm

Re: How to write back Atari 8-Bit Disk?

Post by SomeGuy » Mon Jan 16, 2017 6:26 pm

Here are atr2imd and imd2atr binaries for DOS from Joe's Atari Disk Tools. https://github.com/jhallen/atari-tools

No idea why they don't post their own binaries there.
Attachments
imd2atr.zip
IMD2ATR MS-DOS Executable
(46 KiB) Downloaded 3 times
atr2imd.zip
ATR2IMD MS-DOS Executable
(52.78 KiB) Downloaded 4 times

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