Assembly Language Programming Flashcards

Flashcards on Assembly Language Programming

Variable Declaration

Symbolic names used in place of physical addresses, reserving memory and initializing variables.

Directive (Pseudo-instruction)

A program entity used to control the compilation, linking, and launching of a program; it is not executed.

DB (Define Byte)

Reserves 1 byte of memory, initialized with a value or uninitialized.

DW (Define Word)

Reserves 2 bytes of memory, initialized with a value or uninitialized.

DD (Define Double Word)

Reserves 4 bytes of memory, initialized with a value or uninitialized.

FWORD

Variable on 6 bytes, used for storing pointers (2 bytes for segment + 4 bytes for offset).

QWORD (Quad Word)

Variable on 8 bytes, used for storing very large integers or double-precision floating-point values.

TBYTE (Ten Bytes)

Variable on 10 bytes, used for the math coprocessor, representing 10 unpacked BCD digits or an 80-bit floating-point number.

REAL4

Floating-point variable on 4 bytes.

REAL8

Floating-point variable on 8 bytes.

REAL10

Floating-point variable on 10 bytes.

TYPEDEF

Directive used to define custom data types.

Near Pointer

The address of a variable, represented on 16 bits, indicating the relative address within a segment.

Far Pointer

Indicates an absolute address with segment and offset, represented on 32 bits

Array (Tablou)

Data structure containing elements of the same type.

Record (Inregistrare)

A structure of data containing fields (variables) of different types.

Constant

Symbolic name given to a frequently used value; replaced at compilation.

PROC (Procedure)

Used to declare a procedure; near calls are within the segment, far calls are from outside the segment.

SEGMENT

Used to declare a segment of memory with specific attributes.

ASSUME Directive

Specifies accessible segments, enabling compile-time verification; it does not modify segment registers.