Building a Vexpress-A9 Emulation Environment with QEMU, Custom Kernel, and BusyBox Rootfs
On a machine running Ubuntu 22.04 (with gcc 11.4.0 and host kernel 6.5.0), install QEMU:
sudo apt-get install qemu qemu-system
Download Linux 6.6.16 from https://cdn.kernel.org and extract the archive. Use a separate build directory too keep the source clean:
cd linux-6.6.16
export ARCH=arm
export CROSS_COMPILE=arm-linux-gnueabi-
mkdir ../buil ...
Posted on Wed, 04 Nov 2026 16:52:07 +0000 by polson
Integrating Unix Timestamps with STM32 RTC and Backup Registers
Unix Timestamps
A Unix Timestamp represents the total number of seconds that have elapsed since the Unix Epoch (00:00:00 UTC on January 1, 1970), excluding leap seconds.
This value is typically stored in a 32-bit or 64-bit integer variable acting as a seconds counter.
Since the counter is based on UTC, all time zones share the same counter val ...
Posted on Wed, 04 Nov 2026 16:51:26 +0000 by davidjwest
Extracting Type, Method, and Field Information from Unity IL2CPP Binaries Using IL2CppDumper
Overview
When a Unity project is built using the Mono backend, the Assembly-CSharp.dll is directly accessible from the APK. If the developer hasn’t obfuscated it, tools like ILSpy can easily decompile the assembly. However, when using the IL2CPP backend, this DLL is absent. Instead, the IL2CppDumper tool can reconstruct equivalent type metad ...
Posted on Wed, 04 Nov 2026 16:51:54 +0000 by BandonRandon
Exploring .NET Reflection for Dynamic Type Operations
In the realm of .NET development, Reflection stands as a potent capability, empowering applications to inspect and manipulate their own metadata at runtime. This mechanism allows programs to discover information about types, their members (properties, methods, fields, constructors), and even dynamically create instances or invoke members that w ...
Posted on Wed, 04 Nov 2026 16:50:21 +0000 by phpmash
Efficient Connectivity DP for Grid Path Counting
Given the constraints where the grid height N is small (typically N ≤ 6) and the width M is large, a column-wise dynamic programming approach with state compression is the optimal strategy. The core challenge lies in efficiently tracking connectivity between cells across columns.
Initial DP Formulation and Limitations
A naive dynamic programmin ...
Posted on Wed, 04 Nov 2026 16:48:31 +0000 by tkm
Essential Python Data Analysis Tools
Data Analysis Libraries
Python's native data analysis capabilities are limited, requiring third-party libraries to enhance its functionality. The key libraries we'll explore include NumPy, Matplotlib, and Pandas. Below is a brief introduction to these three libraries, with detailed usage examples covered in later sections.
NumPy
Python lacks bu ...
Posted on Wed, 04 Nov 2026 16:48:57 +0000 by T.Stedel
Simplifying Complex Systems with the Facade Design Pattern
Understanding the Facade Design Pattern
The Facade pattern is a structural design approach that conceals the intricate internal workings of a system by exposing a single, simplified interface. Rather than forcing consumers to interact with numerous fragmented APIs or tightly coupled modules, the facade coordinates necessary operations behind th ...
Posted on Wed, 04 Nov 2026 16:47:18 +0000 by sarahk
Optimizing IN Clause Queries in MySQL: Finding the Right Number of Values
**Introduction**
Do you recall the question I left hanging in my previous article "Do NULL Values Impact Query Performance?"? If not, you can revisit that piece and search for the keyword "What's the optimal number of values for an IN field query?" to find it.
Let's revisit this question: How do the primary keys 6, 8, 2, and ...
Posted on Wed, 04 Nov 2026 16:45:06 +0000 by JBS103
Configuring Docker Containers with Static IPs on CentOS 7 Using Pipework and a Linux Bridge
To assign a static IP address to a Docker container on CentOS 7 using pipework, begin by setting up a Linux bridge.
First, modify the physical interface configuration to attach it to a bridge. Edit /etc/sysconfig/network-scripts/ifcfg-ens33:
TYPE=Ethernet
BOOTPROTO=none
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFR ...
Posted on Wed, 04 Nov 2026 16:44:28 +0000 by shumway
AJAX Fundamentals
Introduction to AJAX
AJAX (Asynchronous JavaScript and XML) anables web pages to communicate with servers without reloading the entire page. This article covers practical AJAX implementation paterns.
1. Basic AJAX Implementation
The following example demonstrates how to send form data to a server using jQuery's AJAX function:
The correspondin ...
Posted on Wed, 04 Nov 2026 16:43:28 +0000 by KILOGRAM