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cmpsb instruction in 8086
string instructions in assembly language
string instructions in 8086
rep instruction in 8086
lodsb instruction in 8086
stosb instruction in 8086
movsb x86
cld instruction in 8086
This text will generally drop the x suffix when talking about these string instructions in a general sense.) They are the string primitives since you can build most other string operations from these five instructions. How you use these five instructions is the topic of the next several sections. For MOVS: movsb(); movsw();
Opcode. Instruction. Description. A4. MOVS m8, m8. Move byte at address DS:(E)SI to address ES:(E)DI. A5. MOVS m16, m16. Move word at address DS:(E)SI to address ES:(E)DI. A5. MOVS m32, m32. Move doubleword at address DS:(E)SI to address ES:(E)DI. A4. MOVSB. Move byte at address DS:(E)SI to address ES:(E)
To make DF = 1, use the std instruction. std ;set direction flag. cld and std have no effect on the other flags. Moving a String. Suppose we have defined two strings. DATASEG string1 DB "HELLO" string2 DB 5 DUP (?). The movsb instruction. movsb ;move string byte. copies the contents of the byte addressed by DS:SI to the
After each move, SI and DI are automatically adjusted to point to the next source and destination respectively. The Direction Flag (DF) value determines whether SI and DI are to be incremented (DF = 0) or decremented (DF = 1) after each move. The MOVSB instruction tells the assembler to move data as bytes; the MOVSW
MOV AL, -5 ; AX = 000FBh (251). CBW. ; AX = 0FFFBh (-5). RET. CZSOPA unchanged. Clear Carry flag. Algorithm: CF = 0. Page 6 of 53. 8086 instructions MOVSB. No operands. Copy byte at DS:[SI] to ES:[DI]. Update SI and. DI. Algorithm: 0 ES:[DI] = DS:[SI]. 0 if DF = 0 then. 0 SI = SI + 1. 0 DI = DI + 1 else. 0 SI = SI -
The MOVSB and MOVSW instructions move bytes or words from ds:si to es:di while incrementing or •The mov instruction carries out assignment in 8086 assembly language. Example: Store the ASCII code for the letter A in register bx. 8086 Instruction Templates String instructions Ex. MOVSB. 8086 Example: Alternative
Some of the most important and most frequently used instructions are those that move data. Without them, there Effective Address. 2 Data transfer instructions of 8086 microprocessor . The movsb instruction copies one byte from the memory location specified in esi to the location specified in edi . If the direction flag is
Opcode Instruction Clocks Description A4 MOVS m8,m8 7 Move byte [(E)SI] to ES:[(E)DI] A5 MOVS m16,m16 7 Move word [(E)SI] to ES:[(E)DI] A5 MOVS m32,m32 7 Move dword [(E)SI] to ES:[(E)DI] A4 MOVSB 7 Move byte DS:[(E)SI] to ES:[(E)DI] A5 MOVSW 7 Move word DS:[(E)SI] to ES:[(E)DI] A5 MOVSD 7 Move dword
one of 8086 processor control flags. controls the direction of string operations: DF = 0 => forward (left to right) processing; DF = 1 => backward (right to left) processing Instructions: MOVSB - copies contents of BYTE given by DS:SI into ES:DI MOVSW](http://cdn07.dayviews.com/500/_u4/_u1/_u2/_u7/_u9/_u9/u4127995/25025_1513746673/Movsb_instruction_in_8086_instruction_http_xgn_cloudz_pw_download_file_movsb_instruction_in_8086.jpg)
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Movsb instruction in 8086 instruction: >> http://xgn.cloudz.pw/download?file=movsb+instruction+in+8086+instruction << (Download)
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cmpsb instruction in 8086
string instructions in assembly language
string instructions in 8086
rep instruction in 8086
lodsb instruction in 8086
stosb instruction in 8086
movsb x86
cld instruction in 8086
This text will generally drop the x suffix when talking about these string instructions in a general sense.) They are the string primitives since you can build most other string operations from these five instructions. How you use these five instructions is the topic of the next several sections. For MOVS: movsb(); movsw();
Opcode. Instruction. Description. A4. MOVS m8, m8. Move byte at address DS:(E)SI to address ES:(E)DI. A5. MOVS m16, m16. Move word at address DS:(E)SI to address ES:(E)DI. A5. MOVS m32, m32. Move doubleword at address DS:(E)SI to address ES:(E)DI. A4. MOVSB. Move byte at address DS:(E)SI to address ES:(E)
To make DF = 1, use the std instruction. std ;set direction flag. cld and std have no effect on the other flags. Moving a String. Suppose we have defined two strings. DATASEG string1 DB "HELLO" string2 DB 5 DUP (?). The movsb instruction. movsb ;move string byte. copies the contents of the byte addressed by DS:SI to the
After each move, SI and DI are automatically adjusted to point to the next source and destination respectively. The Direction Flag (DF) value determines whether SI and DI are to be incremented (DF = 0) or decremented (DF = 1) after each move. The MOVSB instruction tells the assembler to move data as bytes; the MOVSW
MOV AL, -5 ; AX = 000FBh (251). CBW. ; AX = 0FFFBh (-5). RET. CZSOPA unchanged. Clear Carry flag. Algorithm: CF = 0. Page 6 of 53. 8086 instructions MOVSB. No operands. Copy byte at DS:[SI] to ES:[DI]. Update SI and. DI. Algorithm: 0 ES:[DI] = DS:[SI]. 0 if DF = 0 then. 0 SI = SI + 1. 0 DI = DI + 1 else. 0 SI = SI -
The MOVSB and MOVSW instructions move bytes or words from ds:si to es:di while incrementing or •The mov instruction carries out assignment in 8086 assembly language. Example: Store the ASCII code for the letter A in register bx. 8086 Instruction Templates String instructions Ex. MOVSB. 8086 Example: Alternative
Some of the most important and most frequently used instructions are those that move data. Without them, there Effective Address. 2 Data transfer instructions of 8086 microprocessor . The movsb instruction copies one byte from the memory location specified in esi to the location specified in edi . If the direction flag is
Opcode Instruction Clocks Description A4 MOVS m8,m8 7 Move byte [(E)SI] to ES:[(E)DI] A5 MOVS m16,m16 7 Move word [(E)SI] to ES:[(E)DI] A5 MOVS m32,m32 7 Move dword [(E)SI] to ES:[(E)DI] A4 MOVSB 7 Move byte DS:[(E)SI] to ES:[(E)DI] A5 MOVSW 7 Move word DS:[(E)SI] to ES:[(E)DI] A5 MOVSD 7 Move dword
one of 8086 processor control flags. controls the direction of string operations: DF = 0 => forward (left to right) processing; DF = 1 => backward (right to left) processing Instructions: MOVSB - copies contents of BYTE given by DS:SI into ES:DI MOVSW - copies contents of WORD given by DS:SI into ES:DI MOVSD - copies
These cause the instruction to be repeated the number of times in the count register, CX; for REPE and REPNE, the Zero flag is tested at the end of each operation and the loop is stopped if the condition (Equal or Not Equal to zero) fails. The MOVSB and MOVSW instructions have the following forms: MOVSB REP MOVSB
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