How to Modify or Patch the Compiled Executable (inplace, reverse engineering)?
I have a compiled .o file, and how to modify a string constant in it? for example, change “hello” to “HELLO”. Let’s take a look at this simple C …
Category: assembly language
How to View the Byte Code (Dis-assembler) of a Compiled Executable?
To view the bytecode of a compiled executable, you can follow these steps: Compile the C source code to generate an executable file with debugging information using the -g …
Do Thread A and B Require Mutex to Operate on High/Low of a DWORD?
Given a 32-bit DWORD, and two threads A and B, do they require Mutex (exclusive resources) to read/write the High/Low DWORD respectively? e.g. Thread A reads two low bytes …
Print 26 Uppercase Letters using 6502 Assembler on 8-bit Famicom Clone BBG (BBK) – Tutorial 5 – Using Loop
On 16-bit MSDOS, you can use debug.exe (16-bit debugger) to write tiny (or small) .COM binary programs. There is no compilation process, you write the assembly code and the …
Output a String to Console (BBG-DOS) using 6502 Assembly for 8-bit Famicom Clone BBG – Tutorial 4
March 29, 2014
16 bit, 6502, 8 bit, assembly language, code, code library, compiler, console, famicom, implementation, Nintendo Entertainment System, programming languages
No Comments
In 16-bit MSDOS, you can create small executable files that end the filename with ‘.COM’. The .COM is small and less than 64 KB in total file size. There …