EAX is the full 32-bit value; AX is the lower 16-bits; AL is the lower 8 bits; AH is the bits 8 through 15 (zero-based), the top half of AX; So AX is composed of AH:AL halves, and is itself the low …

Nov 11, 2022 · Are EAX, EBX, and ECX just variables or do they all have a unique specific use other than storing values? These are the different processor registers. There are no variables …

Jul 7, 2017 · Registers like eax, ebx, etc are the 32-bit registers which exist both in the original 32-bit x86 ISA, as well as the 64-bit x86-64. If your book refers only to those registers, it is likely …

The sub-register AX allows us to access the lower 16 bits of EAX. And within AX are the two 8-bit sub-registers, AH and AL. But you may also have noticed that there’s a blank area to the lower …

Mar 20, 2020 · Usually, x86 tutorials don’t spend much time explaining the historical perspective of design and naming decisions. When learning x86 assembly, you’re usually told something …

eax is the 32-bit, "int" size register. It was added in 1985 during the transition to 32-bit processors with the 80386 CPU. I'm in the habit of using this register size, since they also work in 32 bit …

AX is the primary accumulator; it is used in input/output and most arithmetic instructions. For example, in multiplication operation, one operand is stored in EAX or AX or AL register …

Different names (e.g. ax vs. eax vs. rax) refer to different parts of the same register

For example, the least significant 2 bytes of EAX can be treated as a 16-bit register called AX. The least significant byte of AX can be used as a single 8-bit register called AL , while the …

Mar 22, 2020 · Usually, x86 tutorials don’t spend much time explaining the historical perspective of design and naming decisions. When learning x86 assembly, you’re usually told something …