Difference Between 8086 And 80386

Difference Between 8086 And 80386

Though the architecture and instruction set of both 8086 and 8088 processors are same, still there are differences between them.
Following is the table listing the differences between the 2 microprocessors:

  1. This page on 8086 vs 80286 vs 80386 vs 80486 describes difference between 8086, 80286, 80386 and 80486. 8086 is the microprocessor released after 8085 microprocessor from Intel.Refer 8085 vs 8086 for comparison between the two. 8086 Microprocessor. Following are the features of 8086 microprocessor:. Data Bus Width: 16. Addressed Memory Size of: 1M.
  2. The 80486 architecture has been ungraded such that half of its instructions are executed in 1 clock cycle instead of two clock cycles. It has 80386 like microprocessor and 80387 like numeric coprocessor. Following table compares 80286 vs 80386 vs 80486 and mentions difference between them.
  3. 80286 microprocessor: Basically this microprocessor is an advanced version of 8086. So before starting with 80286 we must know something abo.
  4. What is thf Detail differance between 8086,80286 and 80386 processor? Favorite Answer.

Difference Between 8086 And 80386

S. No.8086 microprocessor8088 microprocessor
1The data bus is of 16 bits.The data bus is of 8 bits.
2It has 3 available clock speeds (5 MHz, 8 MHz (8086-2) and 10 MHz (8086-1)).It has 3 available clock speeds (5 MHz, 8 MHz)
3The memory capacity is 512 kB.The memory capacity is implemented as a single 1 MX 8 memory banks.
4It has memory control pin (M/IO) signal.It has complemented memory control pin (IO/M) signal of 8086.
5It has Bank High Enable (BHE) signal.It has Status Signal (SSO).
6It can read or write either 8-bit or 16-bit word at the same time.It can read only 8-bit word at the same time.
7Input/Output voltage level is measured at 2.5 mA.Input/Output voltage level is measured at 2.0 mA
8It has 6 byte instruction queue.It has 4 byte instruction queue as it can fetch only 1 byte at a time.
9It draws a maximum supply current of 360 mA.It draws a maximum supply current of 340 mA.

Difference Between 8086 And 80386 In Tabular Form

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Difference Between 8085 And 8086 And 80386

The primary difference between these modes is the availability of the memory space and the addressing scheme. The 80386 has 32 bit registers and is upward software compatible with the 8086. The execution of the instructions is highly pipelined and the processor is designed to operate in a multiuser and multitasking environment.

Difference Between 8086 And 80286 And 80386

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