Questions tagged [file-format]
Relating to the encoding format of data within files.
4
votes
3answers
231 views
How can I debug a Mac OS Classic application?
I have a Mac OS Classic application (a game) that I want to "debug". It has data files in a unique format than I am attempting to reverse-engineer. I've made some progress with a hex editor, but ...
10
votes
2answers
503 views
Origin of “tarball”
It seems to be common (at least among my section of the world's *NIX users) to refer to "tape archives" made with GNU tar or similar as "tarballs". I always thought this was a slightly odd choice, ...
16
votes
5answers
2k views
What determines which architecture an a.out executable runs on?
The ELF file format has an e_machine field in the header, which specifies which ISA the executable expects. And the e_ident structure also has an EI_OSABI field that specifies which ABI the executable ...
5
votes
0answers
187 views
How to open a CorelDraw WI wavelet-compressed image
I have a large sample of .WI images I need to convert to e.g. JPEGs, but the format now seems defunct.
The mimetype is image/wavelet.
The compression algorithm was developed by Summus, a US company ...
24
votes
3answers
3k views
Magnetic exposure to floppy disk damages file system and requires complete reformat?
What I noticed is, that formatting a floppy disk takes three times as much time for the same data amount as writing a file to the disk normally.
The accoustically perceivable jumps of the head between ...
14
votes
2answers
666 views
What is the difference between DriveSpace and DoubleSpace?
DriveSpace is the successor to DoubleSpace. Both are DOS systems that mount a Compressed Volume File as a drive, allowing ordinary programs to interface with a compressed drive without an intermediate ...
48
votes
5answers
9k views
Why did base64 win against uuencode?
From the the two methods of encoding 8-bit data as human-readable ASCII, for a time, uuencode format was more popular. USENET 'binaries' groups were filled with uuencoded posts with whatever goodies ...
18
votes
1answer
467 views
When was the relocatable object module invented?
During the time when programming was done in machine codes, there was no need for object modules; it just wouldn't make sense. People would write the whole program they needed to run in "zeroes and ...
7
votes
2answers
2k views
Documentation on Windows Explorer Shell Command Files
Windows Explorer Shell Command Files are a feature added to Windows with Internet Explorer 4 (95 / NT 4). They were used in the now-defunct Quick Launch bar to show the desktop, open IE4's Channels ...
10
votes
1answer
310 views
On-disk structures for Files-11 format (RSX11)
I'm looking for an explanation, or a link to documentation of the on-disk structures of the Files-11 format, that is, the format of disks used by RSX-11 on the PDP-11. Also known as ODS-1, the ...
10
votes
1answer
319 views
How are File Timestamps recorded in classic Mac OS?
When I save a file it has a 'Created At' and 'Updated At' Value saved as well. I would like to know HOW these values are saved? Are they saved as an integer representing a number of seconds since 1904?...
19
votes
2answers
1k views
What were the differences in floppy disk formats between Amiga and IBM/PC compatible computers?
The capacity in Amiga Old File System format (OFS, OS version 1.x) was 840KB, with the Fast File System ("FFS" (!)) introduced for OS 2.x onwards able to store 880KB. The PC format stored 720KB on the ...
9
votes
3answers
835 views
What format is the (Timex) Sinclair ZX Spectrum SCREEN$/.SCR file
What format is the (Timex) Sinclair ZX Spectrum SCREEN$/.SCR file and how is the fore/background and attribute data encoded within this format?
