AX is the 16 lower bits of EAX. AH is the 8 high bits of AX (i.e. the bits 8-15 of EAX) and AL is the least significant byte (bits 0-7) of EAX as well as AX. Example (Hexadecimal digits): EAX: 12 …

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 …

Aug 12, 2024 · There are 8 general-purpose registers in the 8086 microprocessor. 1. AX: This is the accumulator. It is of 16 bits and is divided into two 8-bit registers AH and AL to also …

Mar 20, 2020 · AX was a 16-bit accumulator, while AH and AL could be thought of as 8-bit registers on their own or as a way to access the high-order and the low-order bytes of AX. The …

The AX, AH, and AL sub-registers are all accessible within EAX: Fig 3 : The 32-bit EAX register retained AX, AH, and AL as sub-registers. The sub-register AX allows us to access the lower …

The least significant byte of AX can be used as a single 8-bit register called AL, while the most significant byte of AX can be used as a single 8-bit register called AH. These names refer to …

ax is the 16-bit, "short" size register. It was added in 1979 with the 8086 CPU, but is used in DOS or BIOS code to this day. al and ah are the 8-bit, "char" size registers. al is the low 8 bits, ah is …

May 15, 2016 · I'm having trouble understanding registers in x86 Assembly, I know that EAX is the full 32 bits, AX is the lower 16 bits, and then AH and AL the higher and lower 8 bits of AX, But …

Oct 26, 2018 · There are special short-form encodings of many instructions using AL/AX/EAX (like add al, 2 is 2 bytes, but add cl, 2 is 3 bytes). 8086 (and later extensions in 186/386) made the …

AH AL AX = AH | AL BH BL BX = BH | BL CH CL CX = CH | CL DH DL DX = DH | DL BP SI DI SP General Purpose Registers: 8,16,32 bits 31 15 7 0 EAX EBX ECX EDX EBP ESI EDI ESP CS …