The main function of flag registers is to modify the CPU operations after mechanical functions are completed and we cannot access directly The IP register point to the current executing instruction and always works to gather with the CS segment register. Special purpose registers: The 8086 CPU has consisted 2- special function registers such as IP and flag registers. These all are 16-bit registers where four registers are divided into two parts such as AX, BX, CX, and DX which is mainly used to keep the numbers. General purpose registers: The 8086 CPU has consisted 8-general purpose registers and each register has its own name as shown in the figure such as AX, BX, CX, DX, SI,DI, BP, SP. The 8086 microprocessor contains various kinds of registers that can be classified according to their instructions such as If we want to manipulate data to a processor or controller by performing multiplication, addition, etc., we cannot do that directly in the memory where need registers to process and to store the data. A Register is the main part of the microprocessors and controllers which are located in the memory that provides a faster way of collecting and storing the data. The assembly level programming 8086 is based on the memory registers. The microprocessor requires a program to perform the operations that require a memory for read and save the functions.
#EMU8086 SIMULATOR SERIAL#
The 8086 microprocessor has CISC based architecture, and it has peripherals like 32 I/O, Serial communication, memories and counters/timers. The 8086 is a processor that is represented for all peripheral devices such as serial bus, and RAM and ROM, I/O devices and so on which are all externally connected to CPU by using a system bus. Hardware of The Processor 8086 Processor Architecture
Before writing the program the embedded designers must have sufficient knowledge on particular hardware of the controller or processor, so first we required to know hardware of 8086 processor. The microcontroller or microprocessor can understand only the binary language like 0’s or 1’s therefore the assembler convert the assembly language to binary language and store it the memory to perform the tasks. The assembly programming language is a low-level language which is developed by using mnemonics. Assembly Level Programming 8086 Assembly Level Programming 8086
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