#191 Explain what happens when the PUSH BX

Explain what happens when the PUSH BX - Computer Science

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Explain what happens when the PUSH BX instruction executes. Make sure to show where BH and BL are stored. (Assume that SP = 1008H and SS = 0000H before execution and the stack segment is residing in memory locations 00000H - OFFFFH)

Mention how many "244 unidirectional buffer, '245 bidirectional buffer and 373 latches ICs we need to make a fully buffered 8086 microprocessor? Draw the fully buffered 8086 microprocessor using the above mentioned ICs.

Interface two 32KB RAM to the 16-bit data bus of 8086 based system. Design an address decoder (74LS138) assigning the address range of B0000H-BFFFFH for the RAMs.

Draw the internal block diagram of a clock generator IC (8284A).

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Free Chegg Answer

What happens when a push operation is executed.

Execution process of push BX Instruction:

-Push operation is performed to push the content of register to the stack .

-Similarly when push BX is performed the content of the register BX is moved to the stack.

-When ever data is pused onto the stack the data is stored in memory partitions SP-1 and SP-2.

-Higher order bits are placed in SP-1.

-Lower order bits are placed in SP-2.

-Each memory partition can store 8 bits of data.

-After the data is stored by push operation the content of the register SP is decremented by two.

-Lets consider the content of BX register as 1234 in the below Array table.

Now lets perform push bx operation to the bx content and let us see how it works with memory blocks in the below diagram: