Question

What is the size of data bus and address bus in 8086?

Answer 1

All internal registers, as well as internal and external data buses, are 16 bitswide, which firmly established the "16-bit microprocessor" identity of the 8086. A 20-bit external address bus provides a 1 MB physical address space (220 = 1,048,576).

Answer 2

Answer:

Buses and operation

All internal registers, as well as internal and external data buses, are 16 bits wide, which firmly established the "16-bit microprocessor" identity of the 8086. A 20-bit external address bus provides a 1 MB physical address space (220 = 1,048,576).