Question

Address line of 8086 microprocessor __________.

• A. 4 byte
• B. 8 byte
• C. 10 byte
• D. 5 nibble

Answer 1

The correct option is D 5 nibble

Address line of 8086 microprocessor is 5 nibbles.

Intel 8086 is a 16 bit integer processor. It has 16-bit data bus and 20-bit address bus. The lower 16-bit address lines and 16-bit data lines are multiplexed (AD0-AD15). Since 20-bit address lines are available, 8086 can access up to 2 20 or 1 Giga byte of physical memory.

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 (2^{^20} = 1,048,576).