CAN YOU PLEASE ANSWER AND ONE OR TWO OF THESE NOT ALL OF THEM PLEASE Write ARM7

Question

CAN YOU PLEASE ANSWER AND ONE OR TWO OF THESE NOT ALL OF THEM PLEASE

Write ARM7 assembly programs to solve 5 of the problems listed below - use the VisUAL ARM Emulator as discussed in class and use the program shell from Find8.s as a starting point for each program 1. Write a program called SUB64 to subtract the 64-bit integer in memory locations 0x0150 from the 64- bit integer in 0x0160. Store the result in memory location 0x0170 2. Write a program called COMBINE that combines the low-order nibbles ofthe four bytes in memory locations 0x0150, 0x0154, 0x0158, and 0x015C into a single 16-bit word. The nibbles should be ordered low-to-high in the result beginning with the data from location 0x0150. Store the result as 16-bits in memory location 0x0160 4. Write a program called LSHIFT to shift logically the 32-bit contents of memory location 0x0150 left according to the 8-bit shift count stored in memory location 0x0154 and store the results at memory address 0x0158 5. Write a program called FIND32 to find the largest unsigned 32-bit word in a list. The list begins at address 0x0160. The length of the list is stored in an 8-bit variable at address 0x0150. Store the largest entry in memory location 0x0154 6. Write a program called SCAN to scan a list of unsigned bytes and find the smallest and largest entries in the list. The length of the list is stored in a 16-bit variable at address 0x0158. The list begins at address 0x0160. Store the smallest byte at address 0x0150 and the largest byte at address 0x0154 7. Write a program called COUNT to count the number of characters in a null-terminated ASCII string that are equal to a KEY. The KEY is stored in memory location 0x0150. The string is stored in memory beginning at address 0x0160. Store the 8-bit count in memory location 0x0154 8. Write a program called ONES to determine the number of bits equal to one in a 32-bit variable. The 32- bit variable is in memory location 0x0154. Store the 8-bit counter in memory location 0x0150.] 9. Write a program called UNPACK to convert the 16-bit BCD variable in memory locations 0x0150 and 0x0151 to four ASCII characters with the high-order digit first, beginning in memory location 0x0154 NOTE: for 10 write a short program which will load the required data into registers and then branch with link to the subroutine, then after calling the subroutine then branch to END 10. Write a subroutine called REPLACE that processes a null-terminated string of decimal characters and replaces leading zeros with spaces. Pass the 32-bit address of the beginning of the string to the subroutine in register R0

Explanation / Answer

As per your requirement , I'm Solving Only one of the problems:

9)answer:

// store two two-digit BCD numbers in the memory locations 0150Hand 0151H

// Store the result i.e, the characters of digits in the memorylocations 0154H, 0155H, 0156H and 0157H

#ORG 0000H
#BEGIN 0000H

LDA 0150H //Get the first packed BCD number from thememory
MOV B,A
MVI C,04
ANI F0   

L1: RRC // Need to rotate the content of accumulator in theright for C times(i.e. 4 times)
DCR C
JNZ L1

STA 0154H
MOV A,B
ANI 0F   
STA 0155H

LDA 0151H // to Get the second packed BCD number from the memory
MOV B,A
MVI C,04
ANI F0   

L2: RRC // Need to rotate the content of accumulator in theright for C times(i.e. 4 times)
DCR C
JNZ L2

STA 0156H
MOV A,B
ANI 0F   
STA 0157H
  
// sort in descending order
SORT: MVI B, 03
   LXI H, 0154H
   MVI C, 03H
BACK: MOV A, M
   INX H
CMP M
JG SKIP
   MOV D, M
MOV M, A
DCX H
MOV M, D
INX H
  
SKIP: DCR C
   JNZ BACK
DCR B
JNZ SORT
   HLT

// suppose data at 0150H is 98 (a two digit BCD number)
// we will have 09 at 0154H and 08 at 0155H

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