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Remote initiation of BIOS console redirection

  • US 6,317,798 B1
  • Filed: 02/11/1999
  • Issued: 11/13/2001
  • Est. Priority Date: 02/11/1999
  • Status: Expired due to Fees
First Claim
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1. A computer system communicating with a remote console via an asynchronous connection, wherein the remote console generates a serial break on the asynchronous connection, the computer system comprising:

  • a register having a first bit and a second bit;

    a break detect circuit coupled to the register for detecting the serial break generated by the remote console, and activating a break detect signal in response to the detection, wherein the first bit of the register is set in response to activation of the break detect signal, and wherein the break detect signal is de-activated in response to the second bit of the register being set;

    a system management interrupt (SMI) circuit for asserting an SMI signal upon detection of the break detect signal;

    a memory for storing a basic input output system (BIOS) and an SMI handler routine for handling console redirection requests; and

    a central processing unit (CPU) coupled to the SMI circuit, the register and the memory, wherein the CPU is responsive to the SMI signal being asserted by the SMI circuit, identifies the SMI signal assertion as a remote break by reading the first bit of the register, processes a subsequent console redirection request generated by the remote console by calling the BIOS and the SMI handler routine, and sets the second bit of the register upon completion of the processing of the redirection request.

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