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ASM Cheatsheet

Mainly for Intel 8086 assembly.


General Purpose Registers

Data Registers

  • AX (AH + AL): Accumulator
  • BX (BH + BL): Base
  • CX (CH + CL): Count
  • DX (DH + DL): Data

Later processors have 32-bit and 64-bit versions of these registers, named EAX, EBX, ECX, EDX (i386 and later) and RAX, RBX, RCX, RDX (x64 and later).

Index Registers

  • SI: Source Index
  • DI: Destination Index

Pointer Registers

  • SP: Stack Pointer
  • BP: Base Pointer

Segment Registers

  • CS: Code Segment
  • DS: Data Segment
  • SS: Stack Segment
  • ES: Extra Segment

Control Registers

  • IP: Instruction Pointer
  • FL: Flags Register

Last update: 2024-03-29
Created: 2024-03-29