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Explain Closely Coupled System (CCS)
written 8.3 years ago by gravatar for teamques10 teamques10 ★ 68k modified 2.0 years ago by gravatar for sagarkolekar sagarkolekar ★ 11k
microprocessors and peripherals
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written 8.3 years ago by gravatar for teamques10 teamques10 ★ 68k

Closely coupled configuration-

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  1. Co-processor cannot take control of the bus; it does everything through the CPU.
  2. Closely Coupled processor may take control of the bus independently
  • 8089 shares CPU’s clock and bus control logic.
  • Communication with host CPU is by way of shared memory.
  • Host sets up a message (command) in memory.
  • Independent processor interrupts host on completion.
  1. Two 8086’s cannot be closely coupled.

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