The 8086/8088 is a 16 bit processor running on a 16 bit (8086) or 8 bit (8088) bus with a 20 bit address. It can address 1 MB of memory. Addressing consists of adding the program's effective. The instruction set of 80286 includes the instructions of 8086 and 80186. 80286 has some extra instructions to support operating system and memory management. In protected virtual address mode, it is source code compatible with 8086. The performance of 80286 is five times faster than the standard 8086. Explain MMU of 80286. 8086 are third-generation microprocessors. 8086 has a 16 bit data bus. 8086 has a memory with a capacity of 1 MB (2 20) and 20 bit addresses are used to address the memory locations. 8086 has a 40-pin housing and uses a 5V power supply. Depending on the size and complexity of the programs, it can work in two modes – minimal and maximum. View and Download Intel 80286 programmer's reference manual online. 80286 computer hardware pdf manual download. Also for: 80287.
In the changing world of technologies, the devices used are also changing. Let us take a look at the changes between 8085 series of microprocessors and 8086 series of microprocessors.
| Serial No. | 8085 microprocessor | 8086 microprocessor |
|---|---|---|
| 1 | The data bus is of 8 bits. | The data bus is of 16 bits. |
| 2 | The address bus is of 16 bits. | The address bus is of 20 bits. |
| 3 | The memory capacity is 64 KB.Also 8085 Can Perform Operation Upto 2^8 ie. 256 numbers. A number greater than this is to taken multiple times in 8 bit data bus. | The memory capacity is 1 MB.Also 8086 Can Perform Operation upto 2^16 ie. 65,536 numbers. |
| 4 | The input/output port addresses are of 8 bits. | The input/output port addresses are of 8 bits. |
| 5 | The operating frequency is 3.2 MHz. | The operating frequency is 5 MHz, 8MHZ,10MHZ. |
| 5 | 8085 MP has Single Mode Of Operation. | 8086 MP has Two Modes Of Operation. 1. Minimum Mode = SingLe CPU PROCESSOR 2. Maximum Mode = Multiple CPU PROCESSOR. |
| 6 | It not have multiplication and division instructions. | It have multiplication and division instructions. |
| 7 | It does not support pipe-lining. | It supports pipe-lining as it has two independent units Execution Unit (EU) and Bus Interface Unit (BIU). |
| 8 | It does not support instruction queue. | It supports instruction queue. |
| 9 | Memory space is not segmented. | Memory space is segmented. |
| 10 | It consists of 5 flags(Sign Flag, Zero Flag, Auxiliary Carry Flag, Parity Flag, Carry Flag). | It consists of 9 flags(Overflow Flag, Direction Flag, Interrupt Flag, Trap Flag, Sign Flag, Zero Flag, Auxiliary Carry Flag, Parity Flag, Carry Flag). |
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8086 Microprocessor Ppt
Microprocessor 8086 Pin Diagram
