| Linux-GPIB 4.3.5 Documentation | ||
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If request_control is nonzero, then the board specified by the board descriptor ud is made system controller. If request_control is zero, then the board releases system control.
The system controller has the ability to assert the REN and IFC lines, and is typically also the controller-in-charge. A GPIB bus may not have more than one system controller.
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