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Status indicator for a host adapter

  • US 5,657,455 A
  • Filed: 09/07/1994
  • Issued: 08/12/1997
  • Est. Priority Date: 09/07/1994
  • Status: Expired due to Term
First Claim
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1. A host adapter integrated circuit comprising:

  • a plurality of first terminals for connection to a first bus;

    a plurality of second terminals for connection to a second bus;

    a data transfer circuit for transferring data between said first bus and said second bus, said data transfer circuit comprising;

    a plurality of first lines connected to said plurality of first terminals;

    a plurality of second lines connected to said plurality of second terminals;

    a plurality of third lines; and

    a plurality of fourth lines;

    a status indicator terminal for indicating status of at least a portion of said data transfer circuitry; and

    a status switching circuit comprising;

    an output line coupled to said status indicator terminal;

    a plurality of function input lines, each function input line being coupled to a data transfer circuit third line; and

    a plurality of function enable lines, each function enable line being coupled to a data transfer circuit fourth line;

    wherein said status switching circuit couples said output line to a function input line selected from said plurality of function input lines using an active signal on one of said function enable lines andfurther wherein said status switching circuit decouples said output line from said selected function input line in response to an inactive signal on said one functional enable line.

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