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Overviews of Intel 8085

The Intel 8085 is an 8-bit microprocessor that was introduced by Intel in 1976.

• It was widely used in various applications, including early personal computers, industrial control systems, and educational environments. The 8085 microprocessor is part of the MCS-85 family of microprocessors.

317px Toshiba TMP8085AP 1
  • The 8085 microprocessor has an 8-bit architecture, meaning it processes data in 8-bit chunks.
  • It has a 16-bit address bus, allowing it to address up to 64 KB of memory.
  • The 8085 has various registers, including:
    • Accumulator (A): Used for arithmetic and logic operations.
    • General-purpose registers (B, C, D, E, H, L): Used for various data manipulation tasks.
    • Stack Pointer (SP): Manages the stack operations.
    • Program Counter (PC): Keeps track of the address of the next instruction to be executed.
  • The instruction set of the 8085 is designed to perform a wide range of operations, including arithmetic, logic, data transfer, and control flow.
  • Instructions are encoded as 8-bit or 16-bit binary codes.
  • The 8085 typically operates at clock speeds ranging from 3 to 6 MHz.
  • With its 16-bit address bus, the 8085 can address a maximum of 64 KB of memory.
  • It supports both ROM (Read-Only Memory) and RAM (Random Access Memory).
  • The 8085 includes instructions and hardware support for input and output operations, allowing it to communicate with external devices.
  • The 8085 supports interrupts, allowing external devices to request the CPU’s attention during certain events.
  • The 8085 typically operates on a +5V power supply.
  • The 8085 has a multiplexed address and data bus, meaning the same set of lines is used for both address and data transfer.
  • It has control signals to manage various operations, including data transfer, memory read/write, and interrupt handling.
  • The 8085 found applications in various fields, including early personal computers, educational environments, and industrial control systems.
  • While the 8085 is an older microprocessor, its legacy and influence are still felt in the field of computer architecture and microprocessor design.

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