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Differences between 8086 and 8088 microprocessors

  • Difficulty Level : Medium
  • Last Updated : 15 May, 2018

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:

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.
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