8086 Microprocessor Emulator

8086 Microprocessor Emulator

In old computer this 8086 Microprocessor Emulator is used but now in modern computers we also used this phenomena that is why we study this type of processors

• 8086 Microprocessor Emulator is deal with Registers it have 14 registers
• Each register contain 16 bits

8 General purpose Registers

• AX            Accumulator Register
• BX            Base Register
• CX            Count Register
• DX            Data Register

we can divide these four types of Register in two part

like in lower and higher value 

for example:

AX                AH                AL

BX                BH                 BL

CX                CH                 CL

DX                DH                 DL

when we change the value of the AL then the value of AX change and the AH remain constant

• SI                           Source index Register
• DI                           Destination index Register
• BP                          Base pointer Register
• SP                          Slack Pointer

4 segment Register

• CS                         point at the segment containing the current progress
• DS                         point at the segment with the variable are Defined
• Es                          Extra segment Register
• SS                         it points at the segment containg  slack

2 Spacial  purpose Register

• IP                          instruction pointer Register
• Flag                       Processor current slack

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Instructions:

to give a value to Register 

mov AX,5

it give 5 value in Register AX

to add any value in AX

add AX,3

now AX=8

for increment of one

inc AX

for decrements of one

dec AX

For simple we write a simple code

and the accumulate is