xfd write support

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malers
Posts: 17
Joined: Sun Apr 08, 2012 2:00 pm

xfd write support

Post by malers » Tue Apr 17, 2012 12:56 pm

Hello,

are there any plans for implementing write support for xfd files in 2012?

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Michael

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IFW
Posts: 3079
Joined: Mon Nov 08, 2010 2:42 pm

Re: xfd write support

Post by IFW » Sat Apr 21, 2012 11:41 am

If there is any interest then of course. :)

malers
Posts: 17
Joined: Sun Apr 08, 2012 2:00 pm

xfd write support

Post by malers » Sat Apr 21, 2012 2:57 pm

I am interested :-)

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IFW
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Re: xfd write support

Post by IFW » Sun Apr 22, 2012 1:06 pm

Interest noted :)
If anyone else's interested in this feature, please do say so - thanks :)

TeaRex
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Joined: Tue Nov 30, 2010 5:36 am

Re: xfd write support

Post by TeaRex » Sun Apr 22, 2012 10:19 pm

Always interested in write support... And a question, XFD for Atari 8-bit, right? The I'd like to register interest in general MFM (and if possible FM) write support, which as far as I can see would include Atari disks, provided you can set a custom target drive speed with -v288.

Of course there are so many variations of MFM and FM that maybe it will be difficult to support them all, or will cause an explosion of needed command line parameters. Especially if you include special formats with non-standard track, sector or head numbering, deleted sectors, custom gap sizes, odd data rates, mixing of sector sizes... Maybe use a little format description file instead? But even the most basic FM/MFM write support would be wonderful.

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IFW
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Re: xfd write support

Post by IFW » Sun Apr 22, 2012 10:56 pm

Copy protection will only be supported via IPFs, as otherwise the formats would explode, and any regression testing etc would be a complete nightmare.
Normal disks will be supported, maybe with some additional parameters where needed for popular platforms.

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IFW
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Re: xfd write support

Post by IFW » Sun Apr 22, 2012 10:59 pm

Yes, XFD is A8.
It's standard FM/MFM with different bitcell width.

TeaRex
Posts: 120
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Re: xfd write support

Post by TeaRex » Mon Apr 23, 2012 2:55 am

I wasn't talking about copy protection, even unprotected MFM disks (FM to a lesser extent) seem to exist in all kinds of more or less sick variations. For example, as you will of course know, the Commodore 1581 uses inverted head numbers (1 for front and 0 for back side). IIRC, some system (I forgot which) uses higher than normal sector numbers... Then there's XDF, 2M formats and other such abominations, not really copy protections either but ways to fit more date onto the disk. You're right, those are probably better handled via IPF if anybody needs it at all.

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