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80186 Microprocessors: Introduction and Architecture

Hello friends, today we are going to discuss the 80186 microprocessor with integrated peripherals. The Intel 80186 is an improved version of the 8086 microprocessor. 80186 is a 16-bit microprocessor with a 16-bit data bus and a 20-bit address bus. It has a programmable peripheral device integrated into the same package. The instruction set of the 80186 is a superset of the instruction set of the 8086. The term super-set means that all of the 8086 instructions will execute properly on an 80186, but the 80186 has a few additional instructions. The following figure shows the block diagram and pin diagram of 80186. The CPU is divided into seven independent functional parts. 80186 internal block diagram  80186 68-pins pin diagram  Functional parts of 80186 Microprocessor The Bus Interface Unit (BIU) Execution Unit (EU) Clock Generator Programmable interrupt controller Programmable Chip Select Unit (CSU) Programmable DMA Unit Programmable counter/timers The Bus Interface Unit
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Difference Between RAM and ROM

Hi friends, In this post, we are going to see the difference between Random Access Memory called RAM and Read Only Memory called ROM which is the part of primary memory. If you want the detail information about primary memory and their types, and functions please see our post ‘Computer Primary Memory’

Understanding The Difference Between RAM and ROM

  1. Random Access Memory (RAM) is a semiconductor memory to access the data randomly. The user can write information into RAM and read information from it.
    Whereas Read-only memory (ROM) is also a semiconductor memory just for reading the data from memory. It can not be easily altered or reprogrammed.
  1. RAM allows the computer to read data quickly to run applications. It allows reading and writing so-called as read/write memory.
  2. whereas ROM stores the program required to initially boot the computer. It only allows for reading.
  3. RAM is volatile i.e. its contents are lost when the device is powered off. And ROM is non-volatile i.e. its contents are retained even when the device is powered off

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