In other words, the metadata is optional, and useful when present. This is not an unusual solution. If I recall Peter Schepers' useful informational webpages, X64 isn't used much exactly because it's a container format, and basically has to be interpreted twice -- once to figure out what the format is, and then once again to actually get at the image data. http://ist.uwaterloo.ca/~schepers/formats/X64.TXT There is no advantage for PC users to use this format since virtually no PC > emulator that I know of uses them, and for the most part, it provides the > same functionality as a D64 file. > In order to read a generic X64 file, first you must determine that it is > an X64, and then determine the type of file it contains. In effect, you > have to double-decode the file, which makes support a little more > difficult. Also, you would have to be able to work with *all* of the types > of drives that X64 supports, a daunting task. > Its only advantage is that is encompasses all of the standard disk formats > on the C64. If other disk types were common (like 1581 or CMD disks), then > this format might be more popular. > On Tue, Jan 28, 2014 at 1:13 AM, Jim Brain <brain@jbrain.com> wrote: > On 1/28/2014 12:59 AM, Groepaz wrote: > >> On Tuesday 28 January 2014, you wrote: >> >>> I agree it's a more complete format, but it's not used as much. My idea >>> of putting this same information on track 18 would add this information >>> to the image, and has the benefit that folks could "see" if the disk >>> came from an image when they use a real disk. >>> >>> Yeah, I know it "corrupts" the image. complaints to /dev/null >>> >> the major problem with that approach is that it doesnt work on disks that >> are >> completely filled with data (which isnt really unlikely, lots of cracks >> and >> demos use the dirtrack for files, for example) - which rules it out as a >> generic solution. >> >> Well, since the block has a magic sequence, any block will work. Yes, > though, on a completely filled disk, it's not workable. > > Still, for the millions of D64s that are not full, it's fine. And, if the > D64 does not have the block, it's not like it fails to work. > > It's like an MP3 in that way. > > Jim > > > -- > Jim Brain > brain@jbrain.com > www.jbrain.com > > > > Message was sent through the cbm-hackers mailing list > Message was sent through the cbm-hackers mailing listReceived on 2014-01-28 14:02:46
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