> I myself can produce disk dumps from 8050 disks (~500k) and > 8250 disks (~1M) per disk with my setup. They have up to 29 sectors and > up to 77*2 tracks. > They also handle up to 224 directory entries. See my D16-format as an extended 8250-disk with 156 sectors and 255 tracks. > What actually are you planning to do? I mean, either provide standard > CBM formats, or simply use the filesystem directly. ????: for me 'stanard CBM formats = use the filesystem directly'. Anyway, even with this 16MB-floppy it should be possible to use the direct floppy-commands like blockread etc., just like with D64-file. Commands which are not possible with P00 or plain DOS/UNIX-files. > I think 1M per disk image seems fine already, and for larger files, > simply use the host systems directory structure. I intend to support DOS, P00, T64 and all known Dxx-formats. You could do me a favour by giving me the following info of all known formats if it is not to much trouble: - tracks - sectors / track - track(s) used for directory > BTW, VICE handles directories in the host directory tree as "DIR" files > (in the directory) and you can 'open 1,8,15,"cd:foo/bar"' into them :-) Two minds, one thought :-) In my case I also support the command NOT using the colon. > Just FYI: There is a new .G64 disk image file format on the way. It is > basically defined and finished, only the docs have to be written up. > It is a (AFAIK) a vc1541 disk image in GCR format. It will be supported > by several emulators and can handle more than the usual 35 tracks. What is the advantage of this format above D64? The only thing I can think of is emulating disks with errors made on purpose to get a kind of copy protection. BTW, what does your 8296 show at startup? Hallo Levente, > What about a flexible disk image format, with variable parameters? > I mean, if it contained a header, from which the programs could decide > if the image contains X or Y tracks/sectors etc. On itself not a bad idea at all, in this way you could define a disk which could fit on a 1.44 MB floppy. But to be honest, this would be the only advantage of such a disk format. The others, D64, D81 etc. have the advantage that you can copy them 1-to-1 directly to an existing C= floppy. My D16-format has the advantage of being big but that is the only advantage. Hallo Stephen, > Yup. That's why CMD hard drive partitions are limited to 16 Megs. So somebody already used my idea, nice to know :-) About (sub)directories, if the root is the entry, the $ command starts with sector 1, track 18. If it isn't, the emulator looks up the DIR-file going with the CD-command and uses its sectors as starting point. If there is a chain (cd /xx/yy/zz) then it has to follow it completely. Of course I don't intend to do it every time, I save the track/sector of the last directory-entry and only update it when needed. Groetjes, Ruud - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail cbm-hackers-request@dot.tcm.hut.fi.
Archive generated by hypermail 2.1.1.