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Understanding Assembly Language Basics: Key Instructions and Program Structures

Dive into the fundamentals of assembly language programming with this comprehensive guide. Learn about essential components such as data segments, pseudo-ops, and program structures. Explore key instructions including MOV, ADD, SUB, and I/O operations. Understand control flow structures like loops and conditional statements, along with logic instructions, stack manipulation, and data transfer techniques. This resource is invaluable for beginners looking to grasp the intricacies of assembly language and its applications in computing.

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Understanding Assembly Language Basics: Key Instructions and Program Structures

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  1. 5. Assembly Language

  2. Basics of AL • Program data • Pseudo-ops • Array • Program structures • Data, stack, code segments

  3. Some instructions – • MOV, XCHG • ADD, SUB • INC, DEC • NEG • I/O instructions • INT – interrupt • LEA • SHIFT, ROTATE • JUMP – JMP, Jxxx, etc. • CMP • Signed vs. unsigned jumps • MUL, IMUL • DIV, IDIV • DUP

  4. Conditional flow structure • If – then • If – then – else • Case • AND, OR conditions • Control flow structure • FOR loop • WHILE loop • REPEAT-UNTIL loop

  5. Logic instructions • AND, OR, XOR, NOT • TEST • Shift ins., Rotate ins. • Logical shift/rotate • Arithmetic shift/rotate • Stack, Queue • PUSH, POP

  6. String data transfers [ch.11 [Marut], ch.4 [Brey]] • LODS, STOS, MOVS, INS and OUTS • Addressing modes

  7. Interrupts • Procedures & macro • Virtual memory management • Cache memory management • Exception handler

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