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Peripheral interrupt interface for multiple access to an interrupt level

  • US 4,760,516 A
  • Filed: 11/25/1986
  • Issued: 07/26/1988
  • Est. Priority Date: 11/25/1986
  • Status: Expired due to Term
First Claim
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1. Apparatus connected between a peripheral and an interrupt signal line in a computer system, said apparatus comprising:

  • first means having an output connected to said interrupt signal line and being responsive to a first control signal from said peripheral for providing a transition from a first to a second voltage at said interrupt signal line, said first means once enabled also maintaining said second voltage at said interrupt signal line, said first means being further responsive to a second control signal from said computer system for disabling said first means; and

    second means having an output connected to said interrupt signal line and being responsive to said second control signal for driving said interrupt signal line back to said first voltage.

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