April 12, 2007 GENFB 4

### NAME

genfb - generic framebuffer console driver

### SYNOPSIS

genfb* at pci? genfb* at sbus? wsdisplay* at genfb?

### DESCRIPTION

The genfb driver provides support for generic framebuffers that have no native driver. All it needs are some parameters to describe the framebuffer and an address.

#### PCI

When attaching to a pci(4) bus the driver is configured via device properties:

```width (````uint32`)
  Width in pixels.

```height (````uint32`)
  Height in pixels.

```stride (````uint32`)
  Line size in bytes.

```depth (````uint32`)
  Bits per pixel.

```is_console (````bool`)
  If true, genfb will try to become the system console.

```address (````uint32`)
  Bus address of the framebuffer.

#### SBus

When attaching to sbus(4) all those parameters are retrieved from the firmware.

### SEE ALSO

pci(4), sbus(4), wscons(4), wsdisplay(4)

### BUGS

There is no way to change the color map even when the firmware supports it. The pci(4) bus frontend has only been tested on macppc and requires machine dependent code to pass the properties mentioned above. So far only macppc provides them.