Tag: Computer architecture

Computer Memory Organization

A computer system uses memory elements for storing program instructions, data, and other information. From the perspective of the instruction set, a memory is an array of words, each identified by a unique address that indicates its location within the … Read More

The Intel 8085 Microprocessor

The 8085 Microprocessor is one of the most popular microprocessors. In this article we look at some of the basic features and pin-out configuration of this microprocessor.

The block diagram of the 8085 microprocessor is shown below:

Block diagram of 8085 microprocessor
Figure 1.0 Block
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4 Types of Processor Architectures

Processor architecture can be classified as one of the following four architectures:

  • Accumulator-based processor architecture
  • Register-based processor architecture
  • Stack-based processor architecture
  • Pipeline processor architecture

Accumulator-Based Processor Architecture

Accumulator-based processor architecture
Figure 1.1 Accumulator-based processor architecture

In the accumulator-based processor architecture, illustrated above, instructions … Read More

Basic Architecture of a Microprocessor

The microprocessor is typically referred to as the central processing unit (CPU). It is the part of the processor system which processes the data, fetching instructions from memory, decoding them and executing them. The internal structure (architecture) – depends on … Read More

How Special Function Registers (SFRs) are Mapped into Memory Space

There are two basic primary architectures used for mapping special function registers into memory space. In the first type of arrangement, I/O space and memory space are separated as illustrated in Figure 1.0. The I/O devices have a separate address … Read More