PNOZZ(4)              OpenBSD Programmer's Manual (SPARC)             PNOZZ(4)

NAME
     pnozz - Weitek Power9100 accelerated frame buffer

SYNOPSIS
     pnozz0 at sbus?
     wsdisplay* at pnozz?

DESCRIPTION
     The pnozz is a color frame buffer with graphics acceleration, embedded in
     the Tadpole SPARCbook 3GS, 3GX, 3TX and 3XP laptops.  It is based on the
     Weitek Power9100 video processor and an IBM RGB525 RAMDAC.

     The pnozz driver interfaces the frame buffer with the wscons(4) console
     framework.  It does not provide direct device driver entry points but
     makes its functions available via the internal wsdisplay(4) interface.

     If the tctrl(4) device is also configured, the pnozz will be powered down
     when the lid of the laptop is closed or the screen is blanked.

     On machines with an 800 pixel wide display, the pnozz driver supports
     hardware acceleration to erase the screen and scroll text.

EXTERNAL VIDEO
     If the tctrl(4) device is also configured, the external video output will
     be enabled when an external display is connected, even if the laptop lid
     is closed.

SEE ALSO
     intro(4), sbus(4), wscons(4), wsdisplay(4)

BUGS
     It is not possible yet to change display resolution or color depth.

     Acceleration code does not work correctly on 640 pixel wide displays,
     such as on model 3XP, and is therefore disabled in this case.

OpenBSD 4.7                     March 31, 2008                               1
