{"id":1327,"date":"2020-02-27T08:49:56","date_gmt":"2020-02-27T08:49:56","guid":{"rendered":"https:\/\/bcisnotes.com\/thirdsemester\/?p=1327"},"modified":"2020-02-28T07:51:36","modified_gmt":"2020-02-28T07:51:36","slug":"microprocessor-8085-programming-memory-location-part-4-microprocessor-bcis-notes","status":"publish","type":"post","link":"https:\/\/bcisnotes.com\/thirdsemester\/question-bank\/microprocessor-8085-programming-memory-location-part-4-microprocessor-bcis-notes\/","title":{"rendered":"Microprocessor 8085 programming (Memory Location) Part-4 || Microprocessor || Bcis Notes"},"content":{"rendered":"

Microprocessor 8085 programming (Memory Location)<\/h2>\n

1. Write a program for 8085 to find the smallest number among ten numbers stored at memory <\/strong>location 4500H. [2060 Bhadra]<\/strong><\/p>\n

LXI H, 4500H
\nMVI C, 0AH
\nMOV A, M
\nL2: INX H
\nCMP M
\nJC L1
\nMOV B, A
\nMOV A, M
\nMOV M, B
\nL1: DCR C
\nJNZ L2
\nOUT PORT 1
\nHLT<\/p>\n

2. Someone has damaged a program written at 4050H for 8085 microprocessor. The damaging<\/strong>
\nis done by changing the bit D7 and bit D5 of each byte. The size of the program is 100 bytes. <\/strong>Now write a program for 8085 to correct this damaged program. [2060 Chaitra]<\/strong><\/p>\n

LXI H, 4050H
\nMVI C, 64H
\nL1: MOV A, M
\nANI 80H; 10000000 B
\nRRC
\nRRC
\nMOV B, A
\nMOV A, M
\nANI 20H; 00100000 B
\nRLC
\nRLC
\nMOV C, A
\nMOV A, M
\nANI 5FH; 01011111 B
\nORA B
\nORA C
\nSTAX H
\nINX H
\nDCR C
\nJNZ L1
\nHLT<\/p>\n

3. The temperature of two furnaces being monitored by a microprocessor-based system. A set of <\/strong>readings of the first furnace recorded by thermal sensor is stored at memory locations starting <\/strong>at 4050H. Corresponding readings from the second furnace is stored at the memory location <\/strong>starting at 4070H. Each reading from the first furnace is expected to be higher than the <\/strong>corresponding reading from the second furnace. Among the eight-bit data bit, D7 is used to <\/strong>test the validity of the data. Write an 8085 program to compare valid data from the two <\/strong>tables, if data from the first table is larger than the corresponding data from the second table <\/strong>store 01H in the corresponding memory of the third location starting at 4090H and display <\/strong>01H to indicate the normal operation else store FFH in the corresponding memory location <\/strong>and display FFH in the port to indicate the emergency. When the emergency condition is reached <\/strong>stop the operation. [2060 Jestha]<\/strong><\/p>\n

LXI B, 4050H
\nLXI H, 4070H
\nLXI D, 4090H
\nL2: LDAX B
\nCMP M
\nJC L1
\nJZ L1
\nMVI A, 01H
\nSTAX D
\nOUT PORT
\nINX B
\nIND H
\nINX D
\nJMP L2
\nL1: MVI A, FFH
\nSTAX D
\nOUT PORT
\nHLT<\/p>\n

4. Write a program to transfer eight-bit numbers from 9080H to 9090H if bit D5 is 1 and D3 is 0.<\/strong>
\nOtherwise, transfer data by changing bit D2 and D6 from 1 to 0 or from 0 to 1. Assume there <\/strong>are ten numbers. [2064 Shrawan]<\/strong><\/p>\n

LXI H, 9080H
\nLXI D, 9090H
\nMVI C, 0AH
\nL2: MOV A, M
\nANI 28H
\nCPI 20H
\nJZ L1
\nMOV A, M
\nXRI 44H
\nMOV M, A
\nL1: MOV A, M
\nSTAX D
\nINX H
\nINX D
\nDCR C
\nJNZ L2
\nHLT<\/p>\n

5. There are two tables T1, T2 in memory having ten eight-bit data in each. Write a program for <\/strong>8085 to find the difference of the corresponding element of these two tables. Store the result of <\/strong>each operation on the corresponding element of the third table. Remember that the result should <\/strong>not be negative; it should be |T1 \u2013 T2|. [2064 Poush]<\/strong><\/p>\n

LXI SP, 2999H
\nLXI H, 5000H;\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0TABLE T1
\nLXI D, 6000H;\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0TABLE T2
\nMVI C, 0AH;\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0COUNTER FOR 10 DATA
\nL1: LDAX D
\nMOV B, A
\nMOV A, M
\nCMP B
\nJNC L2
\nMOV A, B
\nMOV B, M
\nL2: SUB B
\nPUSH D
\nMVI D, 70H;\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 TABLE T3
\nSTAX D
\nPOP D
\nINX H
\nINX D
\nDCR C
\nJNZ L1
\nHLT<\/p>\n

30. Write a program for 8085 to transfer data from a table to another if the number of ones in the<\/strong>
\ndata is greater than four else store 00 in the next table. [2065 Kartik]<\/strong><\/p>\n

LXI H, 5000H; SOURCE TABLE
\nLXI D, 6000H; DESTINATION TABLE
\nST: MVI C, 08H; NO OF BITS
\nMVI B, 00H; NO OF 1\u2019S
\nMOV A, M
\nL1: RLC
\nJNC L2
\nINR B
\nL2: DCR C
\nJNZ L1
\nMOV A, B
\nCPI 04H
\nMVI A, 00H
\nJC L3
\nJZ L3
\nMOV A, M
\nL3: STAX D
\nINX H
\nINX D
\nMOV A, E
\nCPI 0AH;\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0SUPPOSE TABLE FOR 10 DATA
\nJNZ ST
\nHLT<\/p>\n

You may also Microprocessor 8085 programming (Memory Location) Part-3\u00a0<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Microprocessor 8085 programming (Memory Location) 1. Write a program for 8085 to find the smallest number among ten numbers stored at memory location 4500H. [2060 […]<\/a><\/p>\n<\/div>","protected":false},"author":1,"featured_media":1334,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[],"yoast_head":"\nMicroprocessor 8085 programming (Memory Location) Part-4 || Micropro..<\/title>\n<meta name=\"description\" content=\"1. Write a program for 8085 to find the smallest number among ten numbers stored at memory location 4500H. 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