In article <[EMAIL PROTECTED]>, Bill Garber <[EMAIL PROTECTED]> wrote:
> You all are making DSK too complicated. All they are is this. > Track 1, sector 1, byte 1 is byte 1 of the file, and so on each byte > from the disk is sequential in the file. Nothing more. Well, first of all, the track/sector/byte numbering stars with 0, not with 1. However, even though Track 0, sector 0, byte 0 was the first byte of the DSK/.DO/.PO disk images, subsequent sectors (such as sector 1) could be positioned differently. When you say "sector 1", do you mean physical sector 1 or logical sector 1? If the latter, there were three major sector interleaving schemes: Apple DOS 3, Apple Pascal (which also was used by ProDOS), and Apple CP/M. Thus, "sector 1" could have four different meanings. In .DSK/.DO/.PO disk images logical sector numbers were used. .DO images used DOS 3 sector interleaving while .PO images used Pascal/ProDOS sector interleaving. .DSK images _usually_ used DOS 3 sector interleaving, but could sometimes use Pascal/ProDOS sector interleaving. I've never seen CP/M sector interleaving be used in these disk images. The Apple II Oasis emulator emulates Microsoft's Z80 card too and thus can run Apple II CP/M -- it runs fine from disk images with DOS 3 sector interleaving. -- ---------------------------------------------------------------- Paul Schlyter, Grev Turegatan 40, SE-114 38 Stockholm, SWEDEN e-mail: pausch at stockholm dot bostream dot se WWW: http://www.stjarnhimlen.se/ http://home.tiscali.se/pausch/ Steve Conrad 810 Main Henrietta, MO 64036 816-494-5692 http://sasha91.0pi.com www.fortunecity.com/rivendell/stonekeep/600 It is no secret (nor should it come as any surprise) that humankind's most noble impulses often surface during the most trying of times, that human spirit rises to the challenge when faced with adversity, that human strength is born from human failings...Is it any wonder, then, that the SDF-1 crew became a tighter family after the fortress had been exiled than it had before? From the log of Captain (later Admiral) Henry Gloval -- Apple2list is sponsored by <http://lowendmac.com/> and... / Buy books, CDs, videos, and more from Amazon.com \ / <http://www.amazon.com/exec/obidos/redirect-home/lowendmac> \ Support Low End Mac <http://lowendmac.com/lists/support.html> Apple2list info: <http://lowendmac.com/lists/apple2.html> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/apple2list%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
