TITLE:
CPU 8086-88 Assembly Language using EMU8086.
INTRODUCTION:
To start the 8086-assembly language, we should have the basic knowledge of micro-processor
architecture. All families of registers are of 16-bits, but some of them can be divided into 8-bits
each and used for different purposes.They are divided into two categories:
1. General purpose registers
a. AX
b. BX
c. CX
d. DX
e. SI
f. DI
2. Special purpose registers
a. CS
b. DS
c. SS
d. ES
AX,BX,CX,DX can be divided into i.e. AH and AL rest are same. There are signal which are
used internally.
Assembly Language Syntax
Single instruction can be divided into three things
E.g: MOV AX , 5498
MOV is mnemonic. It tells us what to do with the operands. AX is operand. And the result will
also be stored into it. 5498 is also operand.
Variables
Variables are always needed in programing languages. In this there are two types of it
1. DB (define byte) 8-bits
2. DW(define word) 16-bits
Example: name type value
Variable1 DW 1897h
EMU8086
Emu8086 is the emulator of 8086 (Intel and AMD compatible) microprocessor and integrated
assembler with tutorials for beginners.
Addressing modes
1.
2.
3.
4.
Registers
Immediate values
Memory
i/o inputs
LAB TASKS: (In-Lab Tasks)
Task 1:
CONCLUSION:
In this lab new tool has been introduced called EMU 8086. And basic introduction of processer
and its assembly language.