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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.
8279 Keyword /Display Controller : Figure shows the structure of 8279 and its interface to the bus. Addressing is according to the table given below. CS RD
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
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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
Write a 32-bit program which when run, allows the user to select from a menu: (1) Enter a Binary Number (2) Enter a Decimal Number (3) Enter a Hexadecimal Number
I NEED PROJECT OF COFE SHOP
write a program using assembly language that print your name
DMA DMA stands for Direct Memory Access It is uses same Address/Data lines on ISA bus It controls the ISA bus instead of the processor ("bus master") Floppy
DMA Hardware (8237 DMAC) : 1)Processor contain HOLD/HOLD Acknowledge lines to interact with 8237 o DMAC can achieve control of ISA bus by asserting HOLD o P
Ask 2. Exchange higher byte of AX and higher byte of BX registers by using memory location 0160 in between the transfer. Then stores AX and BX registers onto memory location 0174 o
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