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GROUP : Group the Related Segments:-
The directive which is used to form logical groups of segments with same purpose or type. This isused to inform the assembler to form a logical group of the following segment names. The assembler passes information to the linker/loader to form the code such that the group declared segments or operands must lie within a 64Kbyte memory segment. Thus all such segments and labels may be addressed by using the same segment base.
PROGRAM GROUP CODE, DATA, STACK
The above statement directs the loader/linker to make an EXE file such that DATA, CODE and STACK segment ought to be lie within a 64kbyte memory segment that named as PROGRAM. For the ASSUME statement, one can utilize the label PROGRAM except than DATA, CODE and STACK as shown.
ASSUME CS: PROGRAM, DS: PROGRAM, SS: PROGRAM.
to separate positive and negative numbers
Machine Coding the Programs So far we have describe five programs which were written for hand coding by a programmer. In this, we will now have a deep look at how these prog
How is bob different from johnny in the outsiders
PTR : Pointer:- The pointer operator which is used to declare the type of a variable, label or memory operand. The operator PTR is prefixed by either WORD or BYTE. If the prefi
You have to write a subroutine (assembly language code using NASM) for the following equation. Dx= ax2+(ax-1)+2*(ax+2)/2
Port Mapped I/O or I/O Mapped I/O I/O devices are mapped into a separate address space. This is generally accomplished by having a different set of signal lines to denote a mem
Addressing mode of 8086 : Addressing mode specify a way of locating operands or data. Depending on the data types used the memory addressing modes and in the instruction ,
DAS: Decimal Adjust after Subtraction:- This instruction converts the result of subtraction operation of 2 packed BCD numbers to a valid BCD number. The subtraction operation has
relocation
Opcode : The opcode generally appear in the first byte.but in a few instructions, a register objective is in the first byte and few other instructions may have their 3-bits of
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