Browse Definitions :
Definition

Intel 8086

The Intel 8086 was Intel’s first x86 processor

Released in 1978, the 8086 began the long line of Intel’s most successful architecture, which eventually included the 80286, 80386 and 80486. The 8086 was a 16-bit processor with a 16-bit data bus, 20-bit external bus, 64K I/O ports; it ran at up to 10Mhz.

In the previous processor generation the amount of addressable RAM was 64K. The 8086 was designed to address as much as 1MB of memory. Normally, a 16-bit processor is limited to 64KB of RAM; while the 8086’s 20-bit bus made 1MB possible, it still needed a way to address it with a 16-bit processor. The 8086 achieved this by transitioning from flat address space to segmented memory.

Rather than redesign the entire memory system, Intel modified it by using a two-part, compound 16-bit address. The memory management unit (MMU) then interpreted the specified 64K segment, as well as its offset, to find the physical address. Once the address was located, the MMU would enquire if the memory permissions allowed the request and, if they did, perform it.

Since the days of the 8086 many companies have made cloned or enhanced versions of it and other Intel processors. These manufacturers include AMD, Texas Instruments, OKI, Siemens AG, NEC and Mitsubishi.

This was last updated in March 2014

Continue Reading About Intel 8086

SearchCompliance
  • OPSEC (operations security)

    OPSEC (operations security) is a security and risk management process and strategy that classifies information, then determines ...

  • smart contract

    A smart contract is a decentralized application that executes business logic in response to events.

  • compliance risk

    Compliance risk is an organization's potential exposure to legal penalties, financial forfeiture and material loss, resulting ...

SearchSecurity
  • Secure Shell (SSH)

    SSH, also known as Secure Shell or Secure Socket Shell, is a network protocol that gives users, particularly system ...

  • NIST Cybersecurity Framework

    The NIST Cybersecurity Framework (NIST CSF) is a policy framework surrounding IT infrastructure security.

  • Advanced Encryption Standard (AES)

    The Advanced Encryption Standard (AES) is a symmetric block cipher chosen by the U.S. government to protect classified ...

SearchHealthIT
SearchDisasterRecovery
  • What is risk mitigation?

    Risk mitigation is a strategy to prepare for and lessen the effects of threats faced by a business.

  • change control

    Change control is a systematic approach to managing all changes made to a product or system.

  • disaster recovery (DR)

    Disaster recovery (DR) is an organization's ability to respond to and recover from an event that affects business operations.

SearchStorage
  • secondary storage

    Secondary storage is persistent storage for noncritical data that doesn't need to be accessed as frequently as data in primary ...

  • optical storage

    Optical storage is any storage type in which data is written and read with a laser.

  • JBOD (just a bunch of disks)

    JBOD, which stands for 'just a bunch of disks,' is a type of multilevel configuration for disks.

Close