I’ve been authorized to give a bounty of $200 USD to be able to extract arbitrary files from the 1505 disk image. No doubt with all the zeros the disk is either very corrupted (backup superblocks?! where?! how?!) or the kernel implicitly knows these things, or finds them somewhere else. I modified the source to just count inodes and write them to disk. However using my approach on the filesytem I always only get a directory with 2 enteries the ‘.’.
Also yes, using the Shoebill code it extracted files just fine. Notice far less zeros.Īdditionally I was able to get another 68k based SYSV Unix disk, and yeah not all zeros. Meanwhile here is what an A/UX SYSV filesystem looks like. And that lead to this:Īs you can see there is a LOT of zeros. Granted we don’t need it, but it made it easier to let the existing code fiddle with apple partitions, but when it comes time to read SYSV blocks, I closed the file handle and swapped things around. Now I’m impatient so it still needs a legit Apple A/UX virtual disk.
So I took the filesystem code from Shoebill, hacked it enough to let me build on Visual Studio, and point it to a raw filesystem and take a look.
Shoebill was panned for not emulating the full Macintosh, rather it reads the kernel directly from the filesystem, and boots into it. Speaking of SYSVr2, Do you know what is another SYSVr2? A/UX. One thing is that the struct to read a super block is 512bytes (or is it always?), and the magic number is near the end, so from the above offsets, subtract 496 (decimal!) and you can get the start and sizes of each filesystem.
Īnd this fits the bill, as the next 32bit ‘word’ is the version, in this case 2 to indicate 1024k blocks ,and improvement added to SYSVr2. Well digging around you’ll eventually find that SYSV filesystems have a magic number, and it’s 0xfd187320 Government Departments and Agencies are as setĪlong with further extraneous info like: TI Sys Vįantastic.
Technical Data and Computer Software clause in DFARS 252.227-7013. Restrictions as set forth in sub-paragraph (c)(1)(ii) of the Rights in Use, duplication, or disclosure by the U.S. (c)Copyright 1989-1990 The Santa Cruz Operation. (c)Copyright 1980, 1984, 1986 Unix System Laboratories, Inc. (c)Copyright 1984-1988 AT&T, All Rights Reserved. (c)Copyright 1986-1992 Texas Instruments Incorporated, All Rights Reserved. Running strings does reveal ‘SysVr3TCPID’ And this appears to be the Unix Version Banner: (c)Copyright 1993 Hewlett-Packard Company, All Rights Reserved. Now looking at a few sources namely unix-ag the OS in question is TI System V, an AT&T SVR3.2 derivate. As you may guess it’s a raw ‘dd’ of a disk.
you must extract it again using unecm.exe to get an ISO file ( IMG / BIN).
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