Method for switching between multiple system hosts

A method for switching between multiple system hosts on a CompactPCI bus, comprising the steps of:

• quiescing the CompactPCI bus;
• disabling system host signals for controlling the CompactPCI bus provided by an active system on a first host board;
• and
• transferring control of the CompactPCI bus to a standby system host on a second host board,
• wherein each system host includes a special arbiter and wherein the step of disabling the system host signals comprises the step of a hot swap controller providing to the special arbiter a float signal causing the special arbiter to disable the system host signals.

A method for switching between multiple system hosts on a bus, comprising the steps of:

• quiescing the bus;
• disabling system host signals for controlling the bus provided by an active system host on a first host board;
• and
• transferring control of the bus to a standby system host on a second host board,
• wherein each system host includes a special arbiter and wherein the step of quiescing the bus comprises the step of a hot swap controller providing to the special arbiter a high priority request signal and the special arbiter providing to the hot swap controller a grant signal only when the bus is idle.

A method for switching between multiple system hosts on a bus, comprising the steps of:

• quiescing the bus;
• disabling system host signals for controlling the bus provided by an active system host on a first host board;
• and
• transferring control of the bus to a standby system host on a second host board,
• wherein each system host includes a special arbiter and wherein the step of disabling the system host signals comprises the step of a hot swap controller providing to the special arbiter a float signal causing the special arbiter to disable the system host signals.