Assemble the instruction AND DL$,[$SI$].$ Store the value $5$F at memory location DS:SI$.$ Set the DX register to CBAD and SI register to $500.$ Execute the instruction.

a$)$ What is the new value in the DX register after execution?

b$)$ What is the binary representation of the byte value at DS:SI$?$

c$)$ What is the binary representation of the value in DL before execution?

d$)$ What is the binary representation of the value in DL after execution?

e$)$ Explain what the AND instruction does.

f$)$ What would happen differently if you changed the order in the command to AND $[$SI$],$ DL$?$

Perform the following steps:

Assemble and execute the instruction SHL DL$,1($shift the contents of the DL register one position to the left$).$

Before executing, store the hexadecimal value $2$ A in the DL register. After executing the instruction, answer the following:

a$)$ What are the binary values in the DL register before and after executing the shift instruction?

b$)$ After the shift, what is the decimal value of the signed byte in the DL register?

c$)$ What was the decimal value of the signed byte in the DL register before the shift?

d$)$ By what factor would you have to multiply the decimal value before the shift to get the decimal value after the shift?

Perform the following steps:

Assemble and execute the instruction SHL AX$,$ CL $($shift the contents of the AX register left by the number of positions specified in the CL register$).$

Before executing the instruction, store the hexadecimal value FF $81$ H in the AX register and the hexadecimal value $03$ H in the CL register.

After executing the instruction, answer the following:

a$)$ What are the binary values in the AX register before and after executing the shift instruction?

b$)$ What is the decimal value of the signed word in the AX register after executing the instruction?

c$)$ What was the decimal value of the signed word in the AX register before the shift?

d$)$ By what factor would you have to multiply the decimal value before the shift to get the decimal value after the shift?

e$)$ Write an instruction that would multiply the signed byte value FD stored in the AL register by $16$ using the SHL instruction. Specify the value that should be loaded into the CL register before execution.

Assemble the instruction SAR AL$,1($shift arithmetic right one place$).$ Store the value E$4$ in the AL register. Execute the instruction.

a$)$ What is the binary value in AL before executing the instruction?

b$)$ What is the binary value in AL after executing the instruction

c$)$ What was the decimal value of the signed byte integer in the AL register before executing the instruction?

d$)$ What was the decimal value of the signed byte integer in the AL register after executing the instruction?