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GSCPCIB(4) Device Drivers Manual (i386) GSCPCIB(4)

gscpcibNational Semiconductor Geode SC1100 PCI-ISA bridge with GPIO

gscpcib* at pci?
isa* at gscpcib?
gpio* at gscpcib?

The gscpcib driver provides support for the National Semiconductor Geode SC1100 System-on-Chip PCI-ISA bridge. This device is a PCI-ISA bridge, but with some additional sub-devices. Besides the core functionality, the gscpcib driver provides support for the GPIO interface of this device.

The device has 64 I/O pins which can be accessed through the gpio(4) framework. The gpioctl(8) program provides a convenient way to manipulate these pins from userland.

gpio(4), intro(4), isa(4), pci(4), gpioctl(8)

The gscpcib driver first appeared in OpenBSD 3.6.

The gscpcib driver was written by Alexander Yurchenko <>.

July 16, 2013 OpenBSD-6.4