Select an OR instruction that will:

5. Select an OR instruction that will : a) OR BL with AH and save the result in AH b) OR 88H with CX c) OR DX with SI and save the result in SI d) OR 1122H with BP e) OR the data addressed by BX with CX and save the result in memory f) OR the data stored 40 bytes after the location addressed by BP with AL and save the result in AL

varue 40A, and AR has the value 4E5. Sterting with the FETCH, describe what happens untar the next FETCH. Make sure to indicate any updated register values as they happen. Memory (in are 0123 for 000 to 002, then 1002, 1801, 7800, F400 for 40A through 40D. AC starts with value 0F24, PC has the

Write a short sequence of instructions in assembly that divides the number in BL by the number in CL and then multiplies the result by 2. The final answer must be a 16-bits number stored in the DX register.

1. If the AL register is storing the binary number 10010010, what will be the contents of the BX register in binary after the instruction "movzx bx, al"? What would be the contents of the BX register in binary if this instruction is performed instead: "movsx bx, al"? What happens if you set ECX to 0 before beginning a loop? Is LOOP an unconditional or conditional transfer instruction?

3. For each instruction in the table, write 8 hexadecimal digits that represent the 32 bits in the destination register after the instruction is executed. Assume s0 is 0x98AB3C6A, s1 is 0x20503666. Instructions to, 50, s1 t1, so, s1 t2, so, s1 t3, 50, 51 addi t4, 50, 0x210 wwwwwww andi t5, 50, -16 add and or xor slli t6, 50, 12 srai s2, 50, 8 Dest. reg. in 8 hexadecimal digits

(b) Construct a sequence of instructions such that (i) you add the 8- digit BCD number in AX and BX to the 8-digit BCD number in CX and DX. (AX and CX are the most significant registers. The result must be found in CX and DX after the addition.). (ii) Then logically shift AX right by 12 bit positions and the rightmost 12 bits of BX into the leftmost 12 bits of AX using double precision shifting. (iii) Assuming that DL= 0F3H and BH=72H , compute the answer after BH is subtracted from DL and show the contents of the flag register bit

Determine the value of memory location 3001H. Given that initial value of register B = 3, C = 10 and E = 15. MOV A, B ANA C ANA E STA 3000H MOV A, B ORA C ORA E STA 3001H MOV A, B XRA C XRA E STA 3001H 02H OFH 06H 03H

11. Show the steps involved in the following MOV BX,91CFH ;BX = 91CFH MOV CL,3 SHR BX,CL ;shift right BX three times Show the contents of the flag register.

4. Select an AND instruction that will : a) AND BX with DX and save the result in BX b) AND 0AEH with DH c) AND DI with BP and save the result in DI d) AND the data addressed by BP with CX and save the result in memory e) AND the data stored in four words before the location addressed by SI with DX and save the result in DX