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LODS : Load String Byte or String Word:-
The LODS instruction loads AL/AX register by the content of a string pointed to by DS:SI register pair. The SI is automatically modified depending on the DF. If it is a byte transfer (LODSB), SI is modified by one and if it is a word transfer (LODSW), the SI is modified by two. No other flags are changed by this instruction.
STOS : Store String Byte or String Word:-
The STOS instruction stores the AL/AX register contents to a location in the string pointed by theES: Dl register pair. Accordingly the Dl is modified. No flags are changed by this instruction. The direction flag controls the string instruction execution. The source index (SI) and destination index (D1) are automatically modified after each iteration. If the DF = 1, then the execution follows auto decrement mode. In this mode, DI and Sl are decremented automatically after each iteration (by 1 or 2 depending on the word or byte operations). Hence, in auto decrementing mode, the strings are mention to by their ending addresses. If the DF = 0, then the execution follows autoincrement mode. In this mode, D1 and S1 are incremented automatically (by 1 or 2 depending on word or byte operation) after each iteration, so in this case, the strings are mention to by their starting addresses.
A/D conversion: Basic tasks: (a) Write a program that will read and display the analog voltage on pin PE7 approximately once every second. (b) Write a program that will read and d
Assembly Language Example Programs We studied the entire instruction set of 8086/88, pseudo-ops and assembler directives. We have explained the process of entering an assembly
Write a program that performs the addition, subtraction, multiplications, division of the given operands. Perform BCD operation for addition and subtraction.
Architecture Of 8088 The register set of 8088 is accurately the same as in to 8086. The architecture of 8088 is also same to 8086 except for 2 changes; a) 8088 has 4-byte instr
Write a program that allows a user to encrypt/decrypt a message using a shift cipher. The user should specify the key and the message. Your program should be able to handle messa
Pin diagram of 8088 : The pin diagram of 8088 is shown in given figure. Most of the 8088 pins and their functions are exactly similar to the corresponding pins of 8086. Hence
The problem to be solved and implemented with an ARM assembly language program You are asked to do some image processing on an image composed of characters shaped in For exa
move a byte string ,16 bytes long from the offset 0200H to 0300H in the segment 7000H..
Interrupt When the CPU detects an interrupt signal, it stops activity of current and jumps to a special routine, known an interrupt handler. This handler then detects why the i
Your assignment for this project is to write an assembly language program that checks if the user's input is a valid ISBN number. A sample run of your program might look like:
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