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S.No.8086 Microprocessor8088 Microprocessor1The instruction Queue is 6 byte long.

The instruction Queue is 4 byte long.

2In 8086 memory divides into two banks, up to 1,048,576 bytes.

The memory in 8088 does not divide in to two banks as 8086.

3The data bus of 8086 is 16-bit wide

The data bus of 8088 is 8-bit wide.

4It has BHE( bar ) signal on pin no. 34 & there is no SSO(bar) signal.

It does not has BHE( bar ) signal on pin no. 34 & has only SSO(bar) signal. It has no S7 pin.

5The output signal is used to select memory or I/O at M/IO(bar) but if IO(bar)/M low or logic '0' it selects I/O devices and if IO(bar)/M is high or logic '1'it selects memory.The output signal is used to select memory or I/O at M(bar)/IO but if IO/M(bar) is low or at logic '0',it selects Memory devices and if IO/M(bar) is high or at logic '1'it selects I/O.6It needs one machine cycle to R/W signal if it is at even location otherwise it needs two.

It needs one machine cycle to R/W signal if it is at even location otherwise it needs two.

In 8086, all address & data Buses are multiplexed.

In 8088, address bus, AD7- AD0 buses are multiplexed.

It needs two IC 74343 for de-multiplexing AD0-AD19.

It needs one IC 74343 for de-multiplexing AD0-AD7.

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Q: Compare 8086 microprocessors and 8088 microprocessors?
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