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8085 assembly language programming

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Prof. Dr. K. Adisesha
Prof. Dr. K. Adisesha

The document contains 10 programs written in 8085 assembly language. Program 1 exchanges two 16-bit numbers. Program 2 adds or subtracts two 8-bit numbers. Program 3 adds two 16-bit numbers. Program 4 subtracts two 16-bit numbers where X is greater than Y. Program 5 adds two variable length numbers. Program 6 performs a block transfer. Program 7 performs a block transfer in reverse order. Program 8 adds 10 decimal numbers. Program 9 displays hexadecimal numbers from 00 to FF. Program 10 performs four-digit BCD addition.

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8085 ASSEMBLY LANGUAGE PROGRAMMING 1) PROGRAM TO EXCHANGE TWO 16 BIT NUMBERS Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8000 8003 8004 8007 800A 800B 800E 2A,00,F0 EB 2A,00,F1 22,00,F0 EB 22,00,F1 CF LHLD F000 XCHG LHLD F100 SHLD F000 XCHG SHLD F200 RST 1 Load memory from specified locations. Exchange contents of HL & DE pairs. Load memory from specified locations. Store memory to specified locations. Exchange contents of HL & DE pairs. Store memory to specified locations. Restart INPUT (Before execution) F001 ; F000 F101 ; F100 12 ; AB 3C ; DE OUTPUT(After execution) F001 ; F000 F101 ; F100 3C ; DE 12 ; AB K. ADISESHA, Presidency college 1
8085 ASSEMBLY LANGUAGE PROGRAMMING 2) PROGRAM TO ADD OR SUBTRACT TWO 8 BIT NUMBERS INPUT : XX, YY Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 8000 8002 8004 8005 8008 800B 800D 8010 8012 8015 3E, XX 06, YY 80/(90) 32,00,F0 D2,10,80 3E,01 C3,12,80 3E,00 32,01,F0 CF Ahead 1 Ahead 2 MVI A, XX MVI B, YY ADD B/SUB B STA F000 JNC (Ahead 1) MVIA, 01 JMP(Ahead 2) MVIA, 00 STA F001 RST1 Move immediately to [A] the data XX Move immediately to [B] the data YY Add(or subtract) [B] with [A] Store contents of [A] in specified location Jump on no carry to specified location Move immediately to [A] the data(01)H Jump unconditionally ahead Move immediately to [A] the data(00)H Store contents of [A] in specified location Restart 1) 2B, 1A 2) 2B, FA OUTPUT TRIAL Addition (XX+YY) Subtraction (XX-YY) ADDRESS F001: F000 F001: F000 1 2 00 : 45 01 : 25 00 : 25 01 : 31 K. ADISESHA, Presidency college 2
8085 ASSEMBLY LANGUAGE PROGRAMMING 3) PROGRAM TO ADD TWO 16 BIT NUMBERS Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 8000 8001 8004 8005 8008 8009 800C 800F 8010 8013 AF 2A, 00, F0 EB 2A,00,F1 19 22,00,F2 D2,10,80 3C 32,02,F2 CF Ahead XRA A LHLD F000 XCHG LHLD F100 DAD D SHLD F200 JNC (Ahead) INR A STA F202 RST1 Clear accumulator and Flag Load memory from specified locations Exchange contents of HL & DE pairs Load memory from specified locations Add HL & DE pairs Store memory to specified locations Jump on no carry to ahead address Increment contents of accumulator by one Store contents of [A] in specified location Restart F001: F000 (X) 4A : 2C F101: F100 (Y) ED : 5B F202:F201: F200 (X+Y) 01 : 37 : 87 K. ADISESHA, Presidency college 3
8085 ASSEMBLY LANGUAGE PROGRAMMING 4) PROGRAM TO SUBTRACT TWO 16 BIT NUMBERS (X>Y) Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 8000 8003 8004 8007 8008 8009 800C 800D 800E 8011 2A,00,F0 EB 2A,00,F1 7D 93 32,00,F2 7C 9A 32,01,F2 CF LHLD F000 XCHG LHLD F100 MOV A, L SUB E STA F200 MOV A, H SBB D STA F201 RST 1 Load memory from specified locations Exchange contents of HL & DE pairs Load memory from specified locations Move contents of [L] to [A] Subtract [E] from [A] Store result in specified location Move contents of [H] to [A] Subtract [D] from [A] with borrow Store result in specified location Restart F001: F000 (X) FA : 2C F101: F100 (Y) BD : 5B F202:F201: F200 (X-Y) 3C : D1 K. ADISESHA, Presidency college 4
8085 ASSEMBLY LANGUAGE PROGRAMMING 5) PROGRAM TO ADD TWO N BYTE NUMBERS Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 8000 8003 8006 8009 800B 800E 800F 8010 8011 8012 8013 8014 8015 8018 8019 801C 801F 8021 8024 8026 8027 21,00,F0 01,00,F1 11,00,F2 3E,(NN) 32,00,81 AF 0A 8E 12 23 03 13 3A,00,81 3D C2,0B,80 D2,24,80 3E,01 C3,26,80 3E,00 12 CF LOOP Ahead 1 Ahead 2 LXIH F000 LXIB F100 LXID F200 MVI A, (NN) STA 8100 XRA A LDAX B ADC M STAX D INX H INX B INX D LDA 8100 DCR A JNZ (LOOP) JNC (Ahead 1) MVI A, 01 JMP (Ahead 2) MVI A, 00 STAX D RST 1 Load HL pair with specified data Load BC pair with specified data Load DE pair with specified data Specify the number of bytes Save the count Clear accumulator and flags Load [A] indirectly from address specified by BC pair Add memory to [A] with carry Store contents of [A] indirectly in location specified by DE pair Update memory Update BC register pair Update DE register pair Load [A] from specified location Decrement count Jump on no zero to perform loop Jump on no carry to ahead address Move immediately to [A] the data(01)H Jump unconditionally to ahead address Move immediately to [A] the data(00)H Store contents of [A] indirectly in address specified by DE pair Restart K. ADISESHA, Presidency college 5
8085 ASSEMBLY LANGUAGE PROGRAMMING INPUT(X) F103 : F102 : F101 : F100 A4 : E6 : F3 : D7 INPUT(Y) F003 : F002 : F001 : F000 C3 : 54 : A2 : 1B OUTPUT(X+Y) F204:F203 : F202 : F201 : F200 01: 68 : 3B: 95: F2 6) PROGRAM FOR BLOCK TRANSFER Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 8000 8002 8005 8008 8009 800A 800B 800C 800D 8010 16,10 21,00,81 01,00,82 7E 02 23 03 15 C2,08,80 CF LOOP MVI D, (10)H LXIH 8100 LXIB 8200 MOV A,M STAX B INX H INX B DCR D JNZ (LOOP) RST1 Set count in [D] Load HL pair with specified address Load BC pair with specified address Move contents of memory to [A] Store contents of [A] indirectly to location specified by BC pair Update memory Update BC pair Decrement count in [D] Jump on no zero to perform the loop Restart INPUT 8100:810:8102:8103:8104:8105:8106:8107:8108:8109:810A:810B:810C:810D:810E:810F 00 : 01: 02 : 03 : 04 : 05 : 06 : 07 : 08 : 09 : 0A : 0B : 0C : 0D : 0E : 0F OUTPUT 8200:8201:8202:8203:8204:8205:8206:8207:8208:8209:820A:820B:820C:820D:820E:820F 00 : 01: 02 : 03 : 04 : 05 : 06 : 07 : 08 : 09 : 0A : 0B : 0C : 0D : 0E : 0F K. ADISESHA, Presidency college 6
8085 ASSEMBLY LANGUAGE PROGRAMMING 7) PROGRAM TO BLOCK TRANSFER IN REVERSE ORDER Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 8000 8002 8005 8008 8009 800A 800B 800C 800D 8010 16,10 21,00,81 01,0F,82 7E 02 23 0B 15 C2,08,80 CF LOOP MVI D, (10)H LXIH 8100 LXIB 820F MOV A,M STAX B INX H DCX B DCR D JNZ (LOOP) RST1 Set count in [D] Load HL pair with specified address Load BC pair with specified address Move contents of memory to [A] Store contents of [A] indirectly to location specified by BC pair Update memory Decrement BC pair by one Decrement count in [D] Jump on no zero to perform the loop Restart INPUT 8100:810:8102:8103:8104:8105:8106:8107:8108:8109:810A:810B:810C:810D:810E:810F 00 : 01: 02 : 03 : 04 : 05 : 06 : 07 : 08 : 09 : 0A : 0B : 0C : 0D : 0E : 0F OUTPUT 820F:820E:820D:820C:820B:820A:8209:8208:8207:8206:8205:8204:8203:8202:8201:8200 0F : 0E : 0D : 0C : 0B : 0A : 09 : 08 : 07 : 06 : 05 : 04 : 03 : 02 : 01 : 00 K. ADISESHA, Presidency college 7
8085 ASSEMBLY LANGUAGE PROGRAMMING 8) PROGRAM TO ADD N DECIMAL NUMBERS (N= 10) Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 8000 8001 8003 8005 8008 8009 800A 800D 800E 800F 8010 8013 8014 8015 8018 AF 0E,0A 16,00 21,00,81 86 27 D2,0E,80 14 23 0D C2,08,80 6F 62 22,00,F2 CF LOOP Ahead XRA A MVI C, (0A)H MVI D , 00 LXIH 8100 ADD M DAA JNC(Ahead) INR D INX H DCR C JNZ(LOOP) MOV L,A MOV H,D SHLD F200 RST 1 Clear accumulator and flags Set N count in [C] Clear [D] Load HL pair with specified data Add memory to [A] Decimal adjust accumulator Jump on no carry to ahead address Increment [D] by one Update memory Decrement count Jump on no zero to perform loop Move [A] to [L] Move [D] to [H] Store contents of HL pair to specified consecutive locations Restart INPUT OUTPUT 8100:810:8102:8103:8104:8105:8106:8107:8108:8109 F201 F200 00 : 01: 02 : 03 : 04 : 05 : 06 : 07 : 08 : 09 00 45 K. ADISESHA, Presidency college 8
8085 ASSEMBLY LANGUAGE PROGRAMMING 9) PROGRAM FOR ADDITION OF HEXA-DECIMAL NUMBERS UNTILL ‘FF’ IS ENCOUNTERED Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 8000 8001 8004 8005 8008 800B 800E 800F 8010 8013 AF 32,F9,FF F5 CD,D3,06 11,FF,FF CD,BE,04 F1 3C C2,01,80 76 LOOP XRA A STA FFF9 PUSH PSW CALL(UPDDT) LXID FFFF CALL(DELAY) POP PSW INR A JNZ (LOOP) HLT Clear accumulator and flags Store contents of accumulator in specified location Push [A] and flags to stack Call display subroutine for data field Implement a delay of 0.5 s using monitor delay subroutine Pop[A] and flags off stack Increment contents of [A] by one Perform the loop until [A] becomes zero Halt OUTPUT: ‘00’ up to ‘FF’ is displayed in data field. K. ADISESHA, Presidency college 9
8085 ASSEMBLY LANGUAGE PROGRAMMING 10) PROGRAM FOR FOUR DIGIT BCD ADDITION K. ADISESHA, Presidency college 10 Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 8000 8003 8006 8009 800B 800E 800F 8010 8011 8012 8013 8014 8015 8018 8019 801C 801F 8021 8024 8026 8027 21,00,F0 01,00,F1 11,00,F2 3E,02 32,00,81 0A 8E 27 12 23 03 13 3A,00,81 3D C2,0B,80 D2,24,80 3E,01 C3,26,80 3E,00 12 CF LOOP Ahead 1 Ahead 2 LXIH F000 LXIB F100 LXID F200 MVI A, (02) STA 8100 LDAX B ADC M DAA STAX D INX H INX B INX D LDA 8100 DCR A JNZ (LOOP) JNC (Ahead 1) MVI A, 01 JMP (Ahead 2) MVI A, 00 STAX D RST 1 Load HL pair with specified data Load BC pair with specified data Load DE pair with specified data Specify the number of bytes Save the count Load [A] indirectly from address specified by BC pair Add memory to [A] with carry Decimal adjust accumulator Store contents of [A] indirectly in location specified by DE pair Update memory Update BC register pair Update DE register pair Load [A] from specified location Decrement count Jump on no zero to perform loop Jump on no carry to ahead address Move immediately to [A] the data(01)H Jump unconditionally to ahead address Move immediately to [A] the data(00)H Store contents of [A] indirectly in address specified by DE pair Restart
8085 ASSEMBLY LANGUAGE PROGRAMMING INPUT(X) F101 : F100 57 : 93 INPUT(Y) F001 : F000 64 : 21 OUTPUT(X+Y) F202 : F201 : F200 01: 22 : 14 K. ADISESHA, Presidency college 11
8085 ASSEMBLY LANGUAGE PROGRAMMING 11) PROGRAM TO FIND 2`S COMPLEMENT OF 8 BIT/ 16 BIT NUMBER Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 8000 8002 8005 8008 8009 800A 800B 800C 800F 8010 8013 8016 8017 801A 06,01/(02) 11,01,00 21,00,F0 7E 2F 77 05 CA, 13,80 23 C3,08,80 2A,00,F0 19 22,00,F1 CF LOOP Ahead MVI B,01/(02) LXID 0001 LXIH F000 MOV A,M CMA MOV M,A DCR B JZ (Ahead) INX H JMP(Loop) LHLD F000 DAD D SHLD F100 RST 1 Move to [B] (01) for 8-bit & (02) for 16-bit complement of data Load DE pair with specified data Load HL pair with specified data Copy contents of memory to [A] Complement contents of [A] Copy contents of [A] to memory Decrement [B] by one Jump on zero to ahead address Update memory Jump unconditionally to perform loop Load contents of HL pair from specified locations Add HL and DE pair of registers Store contents of HL pair to specified locations Restart DATA INPUT OUTPUT(2`s complement) 8-Bit F000 : 7A F100 : 87 16-Bit F001 : F000 :: 1A: 26 F101 : F100 :: E5: DA K. ADISESHA, Presidency college 12
8085 ASSEMBLY LANGUAGE PROGRAMMING 12) PROGRAM FOR SUB TRACTION OF TWO 16-BIT BCD NUMBERS (X>Y) OUTPUT Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 8000 8003 8006 8009 800C 800D 800E 800F 8012 8013 11,86,97 01,59,32 CD,20, 80 6F 5A 48 CD,20,80 67 22,00,F0 CF LXID(9786) LXIB(3259) CALL(Sub-BCD) MOV L,A MOV E,D MOV C,B CALL(Sub-BCD) MOV H,A SHLD F000 RST 1 Load DE pair with specified data Load BC pair with specified data Call subroutine for BCD subtraction Copy contents of [A] to [L] Copy contents of [D] to [E] Copy contents of [B] to [C] Call subroutine for BCD subtraction Copy contents of [A] to [H] Store contents of HL pair to specified locations Restart 12 13 14 15 16 17 8020 8017 8018 8019 801A 801B 3E,99 93 3C 81 27 C9 Sub-BCD MVI A,99 SUB E INR A ADD C DAA RET Move to [A] the given data to subtract using 99` complement Subtract [E] from [A] Increment [A] by 1 Add [C] to [A] Decimal adjust accumulator Return from subroutine unconditionally F001: F000 :: 65 : 27 K. ADISESHA, Presidency college 13
8085 ASSEMBLY LANGUAGE PROGRAMMING 13) PROGRAM FOR BLOCK EXCHANGE Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 11 12 13 8000 8003 8006 8008 8009 800A 800B 800C 800D 800E 800F 8010 8013 21,00,F0 11,00,F1 0E,10 1A 46 77 78 12 23 13 0D C2,08,80 CF LOOP LXIH F000 LXID F100 MVI C,(10)H LDAX D MOV B,M MOV M,A MOV A,B STAX D INX H INX D DCR C JNZ(Loop) RST 1 Load HL pair with specified address Load HL pair with specified address Set counter in [C] for N counts Load [A] indirectly from address indicated by DE pair Copy contents of memory to[B] Copy contents of [A] to memory Copy contents of [B] to [A] Store contents of [A] indirectly onto address in DE pair Update memory Update DE register pair Decrement [C] by 1 Perform the loop until [C] becomes zero Restart INPUT F000:F001:F002:F003:F004:F005:F006:F007:F008:F009:F00A:F00B:F00C:F00D:F00E:F00F 00 : 01 : 02 : 03 : 04 : 05 : 06 : 07 : 08 : 09 : 0A : 0B : 0C : 0D : 0E : 0F F100:F101:F102:F103:F104:F105:F106:F107:F108:F109:F10A:F10B:F10C:F10D:F10E:F10F 10 : 11 : 12 : 13 : 14 : 15 : 16 : 17 : 18 : 19 : 1A : 1B : 1C : 1D : 1E : 1F F000:F001:F002:F003:F004:F005:F006:F007:F008:F009:F00A:F00B:F00C:F00D:F00E:F00F 10 : 11 : 12 : 13 : 14 : 15 : 16 : 17 : 18 : 19 : 1A : 1B : 1C : 1D : 1E : 1F F100:F101:F102:F103:F104:F105:F106:F107:F108:F109:F10A:F10B:F10C:F10D:F10E:F10F 00 : 01 : 02 : 03 : 04 : 05 : 06 : 07 : 08 : 09 : 0A : 0B : 0C : 0D : 0E : 0F OUTPUT K. ADISESHA, Presidency college 14
8085 ASSEMBLY LANGUAGE PROGRAMMING 14) PROGRAM FOR SORTING AN ARRAY OF ‘N-NUMBERS’ IN ASCENDING ORDER INPUT F100:F101:F102:F103:F104:F105:F106:F107:F108:F109 01 : 02 : 03 : 04 : 05 : 06 : 07 : 08 : 09 : 0A OUTPUT F100:F101:F102:F103:F104:F105:F106:F107:F108:F109 0A : 01 : 09 : 05 : 03 : 06 : 08 : 07 : 04 : 02 Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 8000 8001 8003 8004 8005 8008 8009 800A 800B 800E 800F 8010 8011 8012 8013 8014 8017 8018 801B AF 06,0B 48 0D 21,00,F1 7E 23 BE DA,13,80 56 77 2B 72 23 0D C2,08,80 05 C2,03,80 CF START LOOP AHEAD XRA A MVI B,0B MOV C,B DCR C LXIH F100 MOV A,M INX H CMP M JC (AHEAD) MOV D,M MOV M,A DCX H MOV M,D INX H DCR C JNZ (LOOP) DCR B JNZ (START) RST 1 Clear accumulator & flags Move a count (N+1) in [B] Copy contents of [B] to [C] Decrement contents of [C] by one Load the specified address in HL pair Copy contents of [M] to [A] Update memory Compare memory with accumulator Jump on carry to ahead address Copy contents of [M] to [D] Copy contents of [A] to [M] Decrement HL pair by one Copy contents of [D] to [M] Increment contents of HL pair by one Decrement contents of [C] by one Jump on no zero to perform the loop Decrement count in [B] Jump on no zero to specified address Restart K. ADISESHA, Presidency college 15
8085 ASSEMBLY LANGUAGE PROGRAMMING 15) PROGRAM TO CHECK 2-OUT-OF-5 CODE Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 8000 8003 8005 8007 8009 800C 800F 8010 8013 8014 80015 8018 8019 801B 801E 8020 8023 8025 8028 3A,00,F0 0E,05 16,00 E6,E0 C2,23,80 3A,00,F0 0F D2,14,80 14 0D C2,0F,80 7A FE,02 C2,23,80 3E,FF C2,25,80 3E,00 32,00,F1 CF LOOP AHEAD 2 AHEAD 1 AHEAD 3 LDA F000 MVI C,05 MVI D,00 ANI E0 JNZ (AHEAD 1) LDA F000 RRC JNC(AHEAD 2) INR D DCR C JNZ(LOOP) MOV A,D CPI ,02 JNZ(AHEAD 1) MVI A, FF JMP(AHEAD 3) MVI A, 00 STA F100 RST 1 Load data into accumulator from specified location Move a count (05)H in [C] Clear contents of [D] Logical AND (E0) H with [A] Jump on no zero to specified address Load data into accumulator from specified location Rotate contents of [A] to right Jump on no carry to ahead address Increment count in [D] Decrement contents of [C] by one Jump on no zero to perform the loop Copy contents of [D] to [A] Compare (02) H immediately with [A] Jump on no zero to specified address Move ‘FF’ to [A] immediately Jump to specified location unconditionally Move ‘00’ to [A] immediately Store data from accumulator into specified location Restart INPUT OUTPUT F000: 11 F100: FF F000: 13 F100: 00 K. ADISESHA, Presidency college 16
8085 ASSEMBLY LANGUAGE PROGRAMMING 16) PROGRAM TO MULTIPLY TWO DIGIT BCD INPUT OUTPUT F001: F000 F101: F100 11 : 12 01 : 32 Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 8000 8003 8006 8007 800A 800B 800C 800D 800E 800F 80011 8012 8013 8014 8015 8017 8018 8019 801C 801F 21,00,00 3A,00,F0 47 3A,01,F0 4F 79 85 27 6F 3E,00 8C 27 67 78 C6,99 27 47 C2,0B,80 22,00,F1 CF START LXIH (0000 )H LDA F000 MOV B,A LDA F001 MOV C,A MOV A,C ADD L DAA MOV L,A MVI A,00 ADC H DAA MOV H,A MOV A,B ADI ,99 DAA MOV B,A JNZ(START) SHLD(F100) RST 1 Move a count (0000)H in HL pair Load data into accumulator from specified location Copy contents of [A] to [B] Load data into accumulator from specified location Copy contents of [A] to [C] Copy contents of [C] to [A] Add [L] to accumulator Decimal adjust [A] Copy contents of [A] to [L] Clear contents of [A] Add contents of [H] to [A] Decimal adjust [A] Copy contents of [A] to [H] Copy contents of [B] to [A] Add immediately to accumulator 99 Decimal adjust [A] Copy contents of [A] to [B] Jump on no zero to specified address Store data from HL pair onto specified location Restart K. ADISESHA, Presidency college 17
8085 ASSEMBLY LANGUAGE PROGRAMMING K. ADISESHA, Presidency college 18

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8085 assembly language programming

  • 1. 8085 ASSEMBLY LANGUAGE PROGRAMMING 1) PROGRAM TO EXCHANGE TWO 16 BIT NUMBERS Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8000 8003 8004 8007 800A 800B 800E 2A,00,F0 EB 2A,00,F1 22,00,F0 EB 22,00,F1 CF LHLD F000 XCHG LHLD F100 SHLD F000 XCHG SHLD F200 RST 1 Load memory from specified locations. Exchange contents of HL & DE pairs. Load memory from specified locations. Store memory to specified locations. Exchange contents of HL & DE pairs. Store memory to specified locations. Restart INPUT (Before execution) F001 ; F000 F101 ; F100 12 ; AB 3C ; DE OUTPUT(After execution) F001 ; F000 F101 ; F100 3C ; DE 12 ; AB K. ADISESHA, Presidency college 1
  • 2. 8085 ASSEMBLY LANGUAGE PROGRAMMING 2) PROGRAM TO ADD OR SUBTRACT TWO 8 BIT NUMBERS INPUT : XX, YY Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 8000 8002 8004 8005 8008 800B 800D 8010 8012 8015 3E, XX 06, YY 80/(90) 32,00,F0 D2,10,80 3E,01 C3,12,80 3E,00 32,01,F0 CF Ahead 1 Ahead 2 MVI A, XX MVI B, YY ADD B/SUB B STA F000 JNC (Ahead 1) MVIA, 01 JMP(Ahead 2) MVIA, 00 STA F001 RST1 Move immediately to [A] the data XX Move immediately to [B] the data YY Add(or subtract) [B] with [A] Store contents of [A] in specified location Jump on no carry to specified location Move immediately to [A] the data(01)H Jump unconditionally ahead Move immediately to [A] the data(00)H Store contents of [A] in specified location Restart 1) 2B, 1A 2) 2B, FA OUTPUT TRIAL Addition (XX+YY) Subtraction (XX-YY) ADDRESS F001: F000 F001: F000 1 2 00 : 45 01 : 25 00 : 25 01 : 31 K. ADISESHA, Presidency college 2
  • 3. 8085 ASSEMBLY LANGUAGE PROGRAMMING 3) PROGRAM TO ADD TWO 16 BIT NUMBERS Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 8000 8001 8004 8005 8008 8009 800C 800F 8010 8013 AF 2A, 00, F0 EB 2A,00,F1 19 22,00,F2 D2,10,80 3C 32,02,F2 CF Ahead XRA A LHLD F000 XCHG LHLD F100 DAD D SHLD F200 JNC (Ahead) INR A STA F202 RST1 Clear accumulator and Flag Load memory from specified locations Exchange contents of HL & DE pairs Load memory from specified locations Add HL & DE pairs Store memory to specified locations Jump on no carry to ahead address Increment contents of accumulator by one Store contents of [A] in specified location Restart F001: F000 (X) 4A : 2C F101: F100 (Y) ED : 5B F202:F201: F200 (X+Y) 01 : 37 : 87 K. ADISESHA, Presidency college 3
  • 4. 8085 ASSEMBLY LANGUAGE PROGRAMMING 4) PROGRAM TO SUBTRACT TWO 16 BIT NUMBERS (X>Y) Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 8000 8003 8004 8007 8008 8009 800C 800D 800E 8011 2A,00,F0 EB 2A,00,F1 7D 93 32,00,F2 7C 9A 32,01,F2 CF LHLD F000 XCHG LHLD F100 MOV A, L SUB E STA F200 MOV A, H SBB D STA F201 RST 1 Load memory from specified locations Exchange contents of HL & DE pairs Load memory from specified locations Move contents of [L] to [A] Subtract [E] from [A] Store result in specified location Move contents of [H] to [A] Subtract [D] from [A] with borrow Store result in specified location Restart F001: F000 (X) FA : 2C F101: F100 (Y) BD : 5B F202:F201: F200 (X-Y) 3C : D1 K. ADISESHA, Presidency college 4
  • 5. 8085 ASSEMBLY LANGUAGE PROGRAMMING 5) PROGRAM TO ADD TWO N BYTE NUMBERS Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 8000 8003 8006 8009 800B 800E 800F 8010 8011 8012 8013 8014 8015 8018 8019 801C 801F 8021 8024 8026 8027 21,00,F0 01,00,F1 11,00,F2 3E,(NN) 32,00,81 AF 0A 8E 12 23 03 13 3A,00,81 3D C2,0B,80 D2,24,80 3E,01 C3,26,80 3E,00 12 CF LOOP Ahead 1 Ahead 2 LXIH F000 LXIB F100 LXID F200 MVI A, (NN) STA 8100 XRA A LDAX B ADC M STAX D INX H INX B INX D LDA 8100 DCR A JNZ (LOOP) JNC (Ahead 1) MVI A, 01 JMP (Ahead 2) MVI A, 00 STAX D RST 1 Load HL pair with specified data Load BC pair with specified data Load DE pair with specified data Specify the number of bytes Save the count Clear accumulator and flags Load [A] indirectly from address specified by BC pair Add memory to [A] with carry Store contents of [A] indirectly in location specified by DE pair Update memory Update BC register pair Update DE register pair Load [A] from specified location Decrement count Jump on no zero to perform loop Jump on no carry to ahead address Move immediately to [A] the data(01)H Jump unconditionally to ahead address Move immediately to [A] the data(00)H Store contents of [A] indirectly in address specified by DE pair Restart K. ADISESHA, Presidency college 5
  • 6. 8085 ASSEMBLY LANGUAGE PROGRAMMING INPUT(X) F103 : F102 : F101 : F100 A4 : E6 : F3 : D7 INPUT(Y) F003 : F002 : F001 : F000 C3 : 54 : A2 : 1B OUTPUT(X+Y) F204:F203 : F202 : F201 : F200 01: 68 : 3B: 95: F2 6) PROGRAM FOR BLOCK TRANSFER Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 8000 8002 8005 8008 8009 800A 800B 800C 800D 8010 16,10 21,00,81 01,00,82 7E 02 23 03 15 C2,08,80 CF LOOP MVI D, (10)H LXIH 8100 LXIB 8200 MOV A,M STAX B INX H INX B DCR D JNZ (LOOP) RST1 Set count in [D] Load HL pair with specified address Load BC pair with specified address Move contents of memory to [A] Store contents of [A] indirectly to location specified by BC pair Update memory Update BC pair Decrement count in [D] Jump on no zero to perform the loop Restart INPUT 8100:810:8102:8103:8104:8105:8106:8107:8108:8109:810A:810B:810C:810D:810E:810F 00 : 01: 02 : 03 : 04 : 05 : 06 : 07 : 08 : 09 : 0A : 0B : 0C : 0D : 0E : 0F OUTPUT 8200:8201:8202:8203:8204:8205:8206:8207:8208:8209:820A:820B:820C:820D:820E:820F 00 : 01: 02 : 03 : 04 : 05 : 06 : 07 : 08 : 09 : 0A : 0B : 0C : 0D : 0E : 0F K. ADISESHA, Presidency college 6
  • 7. 8085 ASSEMBLY LANGUAGE PROGRAMMING 7) PROGRAM TO BLOCK TRANSFER IN REVERSE ORDER Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 8000 8002 8005 8008 8009 800A 800B 800C 800D 8010 16,10 21,00,81 01,0F,82 7E 02 23 0B 15 C2,08,80 CF LOOP MVI D, (10)H LXIH 8100 LXIB 820F MOV A,M STAX B INX H DCX B DCR D JNZ (LOOP) RST1 Set count in [D] Load HL pair with specified address Load BC pair with specified address Move contents of memory to [A] Store contents of [A] indirectly to location specified by BC pair Update memory Decrement BC pair by one Decrement count in [D] Jump on no zero to perform the loop Restart INPUT 8100:810:8102:8103:8104:8105:8106:8107:8108:8109:810A:810B:810C:810D:810E:810F 00 : 01: 02 : 03 : 04 : 05 : 06 : 07 : 08 : 09 : 0A : 0B : 0C : 0D : 0E : 0F OUTPUT 820F:820E:820D:820C:820B:820A:8209:8208:8207:8206:8205:8204:8203:8202:8201:8200 0F : 0E : 0D : 0C : 0B : 0A : 09 : 08 : 07 : 06 : 05 : 04 : 03 : 02 : 01 : 00 K. ADISESHA, Presidency college 7
  • 8. 8085 ASSEMBLY LANGUAGE PROGRAMMING 8) PROGRAM TO ADD N DECIMAL NUMBERS (N= 10) Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 8000 8001 8003 8005 8008 8009 800A 800D 800E 800F 8010 8013 8014 8015 8018 AF 0E,0A 16,00 21,00,81 86 27 D2,0E,80 14 23 0D C2,08,80 6F 62 22,00,F2 CF LOOP Ahead XRA A MVI C, (0A)H MVI D , 00 LXIH 8100 ADD M DAA JNC(Ahead) INR D INX H DCR C JNZ(LOOP) MOV L,A MOV H,D SHLD F200 RST 1 Clear accumulator and flags Set N count in [C] Clear [D] Load HL pair with specified data Add memory to [A] Decimal adjust accumulator Jump on no carry to ahead address Increment [D] by one Update memory Decrement count Jump on no zero to perform loop Move [A] to [L] Move [D] to [H] Store contents of HL pair to specified consecutive locations Restart INPUT OUTPUT 8100:810:8102:8103:8104:8105:8106:8107:8108:8109 F201 F200 00 : 01: 02 : 03 : 04 : 05 : 06 : 07 : 08 : 09 00 45 K. ADISESHA, Presidency college 8
  • 9. 8085 ASSEMBLY LANGUAGE PROGRAMMING 9) PROGRAM FOR ADDITION OF HEXA-DECIMAL NUMBERS UNTILL ‘FF’ IS ENCOUNTERED Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 8000 8001 8004 8005 8008 800B 800E 800F 8010 8013 AF 32,F9,FF F5 CD,D3,06 11,FF,FF CD,BE,04 F1 3C C2,01,80 76 LOOP XRA A STA FFF9 PUSH PSW CALL(UPDDT) LXID FFFF CALL(DELAY) POP PSW INR A JNZ (LOOP) HLT Clear accumulator and flags Store contents of accumulator in specified location Push [A] and flags to stack Call display subroutine for data field Implement a delay of 0.5 s using monitor delay subroutine Pop[A] and flags off stack Increment contents of [A] by one Perform the loop until [A] becomes zero Halt OUTPUT: ‘00’ up to ‘FF’ is displayed in data field. K. ADISESHA, Presidency college 9
  • 10. 8085 ASSEMBLY LANGUAGE PROGRAMMING 10) PROGRAM FOR FOUR DIGIT BCD ADDITION K. ADISESHA, Presidency college 10 Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 8000 8003 8006 8009 800B 800E 800F 8010 8011 8012 8013 8014 8015 8018 8019 801C 801F 8021 8024 8026 8027 21,00,F0 01,00,F1 11,00,F2 3E,02 32,00,81 0A 8E 27 12 23 03 13 3A,00,81 3D C2,0B,80 D2,24,80 3E,01 C3,26,80 3E,00 12 CF LOOP Ahead 1 Ahead 2 LXIH F000 LXIB F100 LXID F200 MVI A, (02) STA 8100 LDAX B ADC M DAA STAX D INX H INX B INX D LDA 8100 DCR A JNZ (LOOP) JNC (Ahead 1) MVI A, 01 JMP (Ahead 2) MVI A, 00 STAX D RST 1 Load HL pair with specified data Load BC pair with specified data Load DE pair with specified data Specify the number of bytes Save the count Load [A] indirectly from address specified by BC pair Add memory to [A] with carry Decimal adjust accumulator Store contents of [A] indirectly in location specified by DE pair Update memory Update BC register pair Update DE register pair Load [A] from specified location Decrement count Jump on no zero to perform loop Jump on no carry to ahead address Move immediately to [A] the data(01)H Jump unconditionally to ahead address Move immediately to [A] the data(00)H Store contents of [A] indirectly in address specified by DE pair Restart
  • 11. 8085 ASSEMBLY LANGUAGE PROGRAMMING INPUT(X) F101 : F100 57 : 93 INPUT(Y) F001 : F000 64 : 21 OUTPUT(X+Y) F202 : F201 : F200 01: 22 : 14 K. ADISESHA, Presidency college 11
  • 12. 8085 ASSEMBLY LANGUAGE PROGRAMMING 11) PROGRAM TO FIND 2`S COMPLEMENT OF 8 BIT/ 16 BIT NUMBER Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 8000 8002 8005 8008 8009 800A 800B 800C 800F 8010 8013 8016 8017 801A 06,01/(02) 11,01,00 21,00,F0 7E 2F 77 05 CA, 13,80 23 C3,08,80 2A,00,F0 19 22,00,F1 CF LOOP Ahead MVI B,01/(02) LXID 0001 LXIH F000 MOV A,M CMA MOV M,A DCR B JZ (Ahead) INX H JMP(Loop) LHLD F000 DAD D SHLD F100 RST 1 Move to [B] (01) for 8-bit & (02) for 16-bit complement of data Load DE pair with specified data Load HL pair with specified data Copy contents of memory to [A] Complement contents of [A] Copy contents of [A] to memory Decrement [B] by one Jump on zero to ahead address Update memory Jump unconditionally to perform loop Load contents of HL pair from specified locations Add HL and DE pair of registers Store contents of HL pair to specified locations Restart DATA INPUT OUTPUT(2`s complement) 8-Bit F000 : 7A F100 : 87 16-Bit F001 : F000 :: 1A: 26 F101 : F100 :: E5: DA K. ADISESHA, Presidency college 12
  • 13. 8085 ASSEMBLY LANGUAGE PROGRAMMING 12) PROGRAM FOR SUB TRACTION OF TWO 16-BIT BCD NUMBERS (X>Y) OUTPUT Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 8000 8003 8006 8009 800C 800D 800E 800F 8012 8013 11,86,97 01,59,32 CD,20, 80 6F 5A 48 CD,20,80 67 22,00,F0 CF LXID(9786) LXIB(3259) CALL(Sub-BCD) MOV L,A MOV E,D MOV C,B CALL(Sub-BCD) MOV H,A SHLD F000 RST 1 Load DE pair with specified data Load BC pair with specified data Call subroutine for BCD subtraction Copy contents of [A] to [L] Copy contents of [D] to [E] Copy contents of [B] to [C] Call subroutine for BCD subtraction Copy contents of [A] to [H] Store contents of HL pair to specified locations Restart 12 13 14 15 16 17 8020 8017 8018 8019 801A 801B 3E,99 93 3C 81 27 C9 Sub-BCD MVI A,99 SUB E INR A ADD C DAA RET Move to [A] the given data to subtract using 99` complement Subtract [E] from [A] Increment [A] by 1 Add [C] to [A] Decimal adjust accumulator Return from subroutine unconditionally F001: F000 :: 65 : 27 K. ADISESHA, Presidency college 13
  • 14. 8085 ASSEMBLY LANGUAGE PROGRAMMING 13) PROGRAM FOR BLOCK EXCHANGE Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 11 12 13 8000 8003 8006 8008 8009 800A 800B 800C 800D 800E 800F 8010 8013 21,00,F0 11,00,F1 0E,10 1A 46 77 78 12 23 13 0D C2,08,80 CF LOOP LXIH F000 LXID F100 MVI C,(10)H LDAX D MOV B,M MOV M,A MOV A,B STAX D INX H INX D DCR C JNZ(Loop) RST 1 Load HL pair with specified address Load HL pair with specified address Set counter in [C] for N counts Load [A] indirectly from address indicated by DE pair Copy contents of memory to[B] Copy contents of [A] to memory Copy contents of [B] to [A] Store contents of [A] indirectly onto address in DE pair Update memory Update DE register pair Decrement [C] by 1 Perform the loop until [C] becomes zero Restart INPUT F000:F001:F002:F003:F004:F005:F006:F007:F008:F009:F00A:F00B:F00C:F00D:F00E:F00F 00 : 01 : 02 : 03 : 04 : 05 : 06 : 07 : 08 : 09 : 0A : 0B : 0C : 0D : 0E : 0F F100:F101:F102:F103:F104:F105:F106:F107:F108:F109:F10A:F10B:F10C:F10D:F10E:F10F 10 : 11 : 12 : 13 : 14 : 15 : 16 : 17 : 18 : 19 : 1A : 1B : 1C : 1D : 1E : 1F F000:F001:F002:F003:F004:F005:F006:F007:F008:F009:F00A:F00B:F00C:F00D:F00E:F00F 10 : 11 : 12 : 13 : 14 : 15 : 16 : 17 : 18 : 19 : 1A : 1B : 1C : 1D : 1E : 1F F100:F101:F102:F103:F104:F105:F106:F107:F108:F109:F10A:F10B:F10C:F10D:F10E:F10F 00 : 01 : 02 : 03 : 04 : 05 : 06 : 07 : 08 : 09 : 0A : 0B : 0C : 0D : 0E : 0F OUTPUT K. ADISESHA, Presidency college 14
  • 15. 8085 ASSEMBLY LANGUAGE PROGRAMMING 14) PROGRAM FOR SORTING AN ARRAY OF ‘N-NUMBERS’ IN ASCENDING ORDER INPUT F100:F101:F102:F103:F104:F105:F106:F107:F108:F109 01 : 02 : 03 : 04 : 05 : 06 : 07 : 08 : 09 : 0A OUTPUT F100:F101:F102:F103:F104:F105:F106:F107:F108:F109 0A : 01 : 09 : 05 : 03 : 06 : 08 : 07 : 04 : 02 Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 8000 8001 8003 8004 8005 8008 8009 800A 800B 800E 800F 8010 8011 8012 8013 8014 8017 8018 801B AF 06,0B 48 0D 21,00,F1 7E 23 BE DA,13,80 56 77 2B 72 23 0D C2,08,80 05 C2,03,80 CF START LOOP AHEAD XRA A MVI B,0B MOV C,B DCR C LXIH F100 MOV A,M INX H CMP M JC (AHEAD) MOV D,M MOV M,A DCX H MOV M,D INX H DCR C JNZ (LOOP) DCR B JNZ (START) RST 1 Clear accumulator & flags Move a count (N+1) in [B] Copy contents of [B] to [C] Decrement contents of [C] by one Load the specified address in HL pair Copy contents of [M] to [A] Update memory Compare memory with accumulator Jump on carry to ahead address Copy contents of [M] to [D] Copy contents of [A] to [M] Decrement HL pair by one Copy contents of [D] to [M] Increment contents of HL pair by one Decrement contents of [C] by one Jump on no zero to perform the loop Decrement count in [B] Jump on no zero to specified address Restart K. ADISESHA, Presidency college 15
  • 16. 8085 ASSEMBLY LANGUAGE PROGRAMMING 15) PROGRAM TO CHECK 2-OUT-OF-5 CODE Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 8000 8003 8005 8007 8009 800C 800F 8010 8013 8014 80015 8018 8019 801B 801E 8020 8023 8025 8028 3A,00,F0 0E,05 16,00 E6,E0 C2,23,80 3A,00,F0 0F D2,14,80 14 0D C2,0F,80 7A FE,02 C2,23,80 3E,FF C2,25,80 3E,00 32,00,F1 CF LOOP AHEAD 2 AHEAD 1 AHEAD 3 LDA F000 MVI C,05 MVI D,00 ANI E0 JNZ (AHEAD 1) LDA F000 RRC JNC(AHEAD 2) INR D DCR C JNZ(LOOP) MOV A,D CPI ,02 JNZ(AHEAD 1) MVI A, FF JMP(AHEAD 3) MVI A, 00 STA F100 RST 1 Load data into accumulator from specified location Move a count (05)H in [C] Clear contents of [D] Logical AND (E0) H with [A] Jump on no zero to specified address Load data into accumulator from specified location Rotate contents of [A] to right Jump on no carry to ahead address Increment count in [D] Decrement contents of [C] by one Jump on no zero to perform the loop Copy contents of [D] to [A] Compare (02) H immediately with [A] Jump on no zero to specified address Move ‘FF’ to [A] immediately Jump to specified location unconditionally Move ‘00’ to [A] immediately Store data from accumulator into specified location Restart INPUT OUTPUT F000: 11 F100: FF F000: 13 F100: 00 K. ADISESHA, Presidency college 16
  • 17. 8085 ASSEMBLY LANGUAGE PROGRAMMING 16) PROGRAM TO MULTIPLY TWO DIGIT BCD INPUT OUTPUT F001: F000 F101: F100 11 : 12 01 : 32 Sl no. ADDRESS HEX CODE LABEL MNEMONICS COMMENTS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 8000 8003 8006 8007 800A 800B 800C 800D 800E 800F 80011 8012 8013 8014 8015 8017 8018 8019 801C 801F 21,00,00 3A,00,F0 47 3A,01,F0 4F 79 85 27 6F 3E,00 8C 27 67 78 C6,99 27 47 C2,0B,80 22,00,F1 CF START LXIH (0000 )H LDA F000 MOV B,A LDA F001 MOV C,A MOV A,C ADD L DAA MOV L,A MVI A,00 ADC H DAA MOV H,A MOV A,B ADI ,99 DAA MOV B,A JNZ(START) SHLD(F100) RST 1 Move a count (0000)H in HL pair Load data into accumulator from specified location Copy contents of [A] to [B] Load data into accumulator from specified location Copy contents of [A] to [C] Copy contents of [C] to [A] Add [L] to accumulator Decimal adjust [A] Copy contents of [A] to [L] Clear contents of [A] Add contents of [H] to [A] Decimal adjust [A] Copy contents of [A] to [H] Copy contents of [B] to [A] Add immediately to accumulator 99 Decimal adjust [A] Copy contents of [A] to [B] Jump on no zero to specified address Store data from HL pair onto specified location Restart K. ADISESHA, Presidency college 17
  • 18. 8085 ASSEMBLY LANGUAGE PROGRAMMING K. ADISESHA, Presidency college 18