Path: news.uiowa.edu!chi-news.cic.net!news.nd.edu!spool.mu.edu!usenet.eel.ufl.edu!bofh.dot!news.mathworks.com!enews.sgi.com!news.uoregon.edu!cie-2.uoregon.edu!nparker From: nparker@cie-2.uoregon.edu (Neil Parker) Newsgroups: comp.sys.apple2.programmer Subject: Re: help: what is soft sector order of Pascal disks? Date: 31 May 1996 01:15:03 GMT Organization: University of Oregon Campus Information Exchange Lines: 39 Message-ID: <4olh6n$opd@pith.uoregon.edu> References: NNTP-Posting-Host: cie-2.uoregon.edu In article lazarus.long@adobe.com (Lazarus I. Long) writes: >i know that DOS disks are in some interleaved format >and ProDOS disks have their own different interleaving >and CP/M disks have theirs too, all different. > >what is the interleave of Pascal disks? Pascal disks use exactly the same interleave as ProDOS disks. Physical ProDOS/Pascal order DOS 3.3 order -------- ------------------- ------------- 0 0 (block 0, 1st half) 0 1 8 (block 4, 1st half) 7 2 1 (block 0, 2nd half) E 3 9 (block 4, 2nd half) 6 4 2 (block 1, 1st half) D 5 A (block 5, 1st half) 5 6 3 (block 1, 2nd half) C 7 B (block 5, 2nd half) 4 8 4 (block 2, 1st half) B 9 C (block 6, 1st half) 3 A 5 (block 2, 2nd half) A B D (block 6, 2nd half) 2 C 6 (block 3, 1st half) 9 D E (block 7, 1st half) 1 E 7 (block 3, 2nd half) 8 F F (block 7, 2nd half) F (Owners of _Beneath_Apple_DOS_ should take note that this table is different from the one in your book. This table is correct; the _Beneath_ _Apple_DOS_ table is backwards.) - Neil Parker -- Neil Parker, nparker@{cie-2,cie}.uoregon.edu, http://cie-2.uoregon.edu/~nparker "I was going to be a neo-deconstructivist but Mom wouldn't let me." -- Calvin and Hobbes, 7/13/1995