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New posts in machine-code
Are bytes/words/addresses signed or unsigned in Z80 assembler/machine code?
May 22, 2026
assembly
cpu
machine-code
z80
signedness
How do you understand 'REX.W + B8+ rd io' form for x86-64 assembly?
May 16, 2026
assembly
x86-64
nasm
machine-code
instruction-encoding
Understanding the x86 m* operands (FPU and otherwise)
May 06, 2026
assembly
x86
disassembly
32-bit
machine-code
Library for manipulating machine code at runtime?
May 02, 2026
c
assembly
x86
machine-code
Why is default operand size 32 bits in 64 mode?
Apr 23, 2026
assembly
64-bit
x86-64
machine-code
instruction-encoding
What is the method for counting how many bytes your program will be, reading from 32 bit x86 assembly code
Apr 17, 2026
assembly
x86
32-bit
machine-code
code-size
GAS assembler not using 2-byte relative JMP displacement encoding (only 1-byte or 4-byte)
Apr 07, 2026
assembly
x86
gnu-assembler
shellcode
machine-code
REX.W prefix on x86-64 MOV instruction with segment register
Apr 08, 2026
assembly
x86-64
instructions
machine-code
How to write and read bits one by one in a file via NodeJS?
Mar 28, 2026
node.js
stream
binary
buffer
machine-code
Get byte representation of ASM instruction within C code
Mar 26, 2026
c
assembly
machine-code
powerpc
Segmentation fault when using DB (define byte) inside a function
Mar 20, 2026
assembly
x86-64
nasm
machine-code
Why shellcodes with jmp instruction work, and why doesn't the labels work inside a C wrapper?
Feb 24, 2026
assembly
x86
shellcode
machine-code
machine code FF 25 should have 64-bit operand but actually only 32-bit is available
Feb 08, 2026
assembly
x86-64
machine-code
opcode
C++ O2 Memory leak when using const reference to literal in class
Jan 27, 2026
c++
optimization
memory-leaks
machine-code
Assembly decode for x64 JMP instruction
Jan 23, 2026
assembly
x86
x86-64
disassembly
machine-code
ARM64 add instruction preferred opcode?
Dec 24, 2025
assembly
arm64
machine-code
instruction-encoding
MIPS labels storage location
Dec 22, 2025
assembly
mips
machine-code
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