July 2025 – Entropymine
1 post published by jsummers34 during July 2025| Entropymine
Astronomers and other communicators of popular astronomy often tell us that the most recent supernova seen in our own Milky Way galaxy was Kepler’s Star, also named SN 1604, in the year 1604.…| Entropymine
This post is part of a series. For an introduction to the file command, and the other posts in the series, see the first post. When writing a “magic pattern” file for the file command, …| Entropymine
This post attempts to explain a few things about how the file command deals with binary vs. text files, primarily from the standpoint of someone writing “magic patterns” for it. For an …| Entropymine
This post is part of a series on PKLITE executable compression format. For a list of all the posts, see the first post. Until recently, the only pre-v1.00 beta version of PKLITE that I had a copy o…| Entropymine
This is a brief introduction to, and a diagram of, the basic structure of the EXE executable file format used by MS-DOS and some other operating systems. DOS EXE is a subset of the PE “Portab…| Entropymine
EXEPACK is an old executable file compressor for MS-DOS EXE files. It was made by Microsoft, and distributed with their software development kits. Sometimes, EXEPACK was in the form of an independe…| Entropymine
There’s an item in the Internet Archive’s software collection, which someone uploaded and named “EPS CD 2 German 1994”. It contains a few hundred .EXE files, organized in a …| Entropymine
MHD is a little Python script I wrote to do one-line partial hex dumps of multiple files. I made it public in the middle of last year, but didn’t really announce or introduce it, so I guess t…| Entropymine
This is a continuation of Part 1. I’m discussing random trivia about the file command. For a list of other posts about the file command, see this post. Format specifiers Consider the format s…| Entropymine
For an introduction to the file command, and my other posts on the topic, see the first post. I’ve come across some undocumented things, and various weirdness, in the behavior of the file com…| Entropymine
This post is part of a series on PKLITE executable compression format. For a list of all the posts, see the first post. I’ll be making reference to two pieces of my own software: Pkla (an analyzer script), and Deark (which can decompress PKLITE). As is usual in this series, the information here might be … Continue reading Notes on PKLITE format, supplement 4: Polymorphic code| Entropymine
The file command is a classic Unix-centric utility that guesses the format of a file, based only on the file’s contents. It may also print some additional information about the contents of th…| Entropymine
