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There are three types of buses. Address bus: This is used to carry the Address to the memory to fetch either Instruction or Data. Data bus : This is used to carry the Data from the memory. Control bus : This is used to carry the Control signals like RD/WR, Select etc.
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Bus Interface Unit and Execution unit, are the two different functional units in 8086.
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Code, Data, Stack, Extra Segment registers in 8086.
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Execution Unit receives program instruction codes and data from BIU, executes these instructions and store the result in general registers.
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FIFO (First In First Out) stack is used in 8086.In this type of Stack the first stored information is retrieved first.
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In 8086 Carry flag, Parity flag, Auxiliary carry flag, Zero flag, Overflow flag, Trace flag, Interrupt flag, Direction flag, and Sign flag.
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SIM is Set Interrupt Mask. Used to mask the hardware interrupts. RIM is Read Interrupt Mask. Used to check whether the interrupt is Masked or not.
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The BIU in 8088 is 8-bit data bus & 16- bit in 8086.Instruction queue is 4 byte long in 8088and 6 byte in 8086.
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Trap is known as Non-Maskable interrupts, which is used in emergency condition.
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Z80, Intel MSC51 &96, Motorola are the best examples of Microcontroller.
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