Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!seismo!columbia!rutgers!sri-spam!sri-unix!hplabs!ucbvax!UWAVM.BITNET!D7314 From: D7314@UWAVM.BITNET Newsgroups: net.micro.apple Subject: Re: Files not on Catalog Message-ID: <8610100029.AA19813@ucbvax.Berkeley.EDU> Date: Thu, 9-Oct-86 19:36:00 EDT Article-I.D.: ucbvax.8610100029.AA19813 Posted: Thu Oct 9 19:36:00 1986 Date-Received: Fri, 10-Oct-86 08:20:29 EDT Sender: daemon@ucbvax.BERKELEY.EDU Organization: The ARPA Internet Lines: 47 Date: Thu, 9 Oct 86 16:11 PDT From: Patrick Ryan Subject: Re: Files not on Catalog To: Apple Mailing list ================================================================================ > Does anyone know how to find out the names of files that do not > show up when you type in CATALOG. I know they are on the disk. > How do you go about accessing them? There are 2 ways to do this, one of which is quite fallable but easy, one of which is surefire but difficult (both assume that the disk isn't copy-protected ). One way is to use Copy ][+ or some such utility and use the 'undelete' facility (I am assuming that the files were deleted, or else how would the files be on the disk?) The other way is fairly straightforward (once you get used to it). Again, assuming you have Copy ][+, the first step is to do a disk map. Print this. Now look through the disk with the disk editor, in the non-marked sectors (if the files were in the marked sectors, they've been overwritten). What you are searching for is something like this: 12 0E 12 0D 12 0C 12 0B 12 0A 12 10 12 09 12 08 12 07 12 06 12 05 etc. This is known as a "Track Sector map" (T/S map). The T/S map tells DOS where your file is stored at on the disk. In this case, the T/S map is undoubtably stored on track 12, sector 0F (most of the time, T/S maps are stored on sector 0F of a track). The first sector of the file is on track 12 0E, the next is on sector 0D, etc. Print this. (track 11) by searching for the end of the catalog (start at sector 0F and ****** BACK UP YOUR DISK BEFORE DOING ANY MORE!! ***** Edit your catalog track ( track 12) Find the appropriate sector by working backwards till you find a blank space.) Put in a name. Look at the other names, and you'll see there is a hexadecimal code for Binary, Text and Applesoft files. Put in the appropriate one (if you know what it is). If you don't have the foggiest idea, then Binary is probably your best bet. Now count the sectors (from the T/S list) and plug it into the catalog. You are done! Try to run it... Patrick Ryan D7314@UWAVM.BITNET