8086 Datasheet Jun 2026

In the pantheon of computing history, few documents are as legendary as the . While today we browse sleek PDF manuals for 64-bit multi-core processors spanning thousands of pages, the original Intel 8086 datasheet was a concise, yet profoundly deep, gateway into the 16-bit revolution. It served as the blueprint for the IBM PC and the foundation of the x86 architecture that still powers the majority of desktop and laptop computers today.

| 15 - 8 | 7 - 0 | | | AH | AL | AX (Accumulator) | | BH | BL | BX (Base) | | CH | CL | CX (Count) | | DH | DL | DX (Data) | 8086 datasheet

CLK _|‾|_|‾|_|‾|_|‾|_ T1 T2 T3 T4 ALE ___‾‾‾___________ AD0-15 Address --> Data RD ___________‾‾‾____ In the pantheon of computing history, few documents

: Used for memory management. These include CS (Code), DS (Data), SS (Stack), and ES (Extra). | 15 - 8 | 7 - 0

A hallmark of the 8086 architecture is . Since the registers are 16-bit but the address bus is 20-bit, the CPU uses a "segment:offset" approach.