DVBOX(4)              OpenBSD Programmer's Manual (HP300)             DVBOX(4)

NAME
     dvbox - HP98730 DaVinci frame buffer

SYNOPSIS
     dvbox*     at intio?
     dvbox*     at dio?
     wsdisplay* at dvbox?

DESCRIPTION
     The HP98730 and HP98731 are stackable 4-bit color frame buffers, also
     known as the DaVinci.  By adding up to 7 HP98732A frame buffer exten-
     sions, it is possible to add overlay planes.

     The dvbox driver provides a frame buffer abstraction to the wscons(4)
     console framework.

     The DaVinci can be configured at either the ``internal'' address (frame
     buffer address 0x200000, control register space address 0x560000) or at
     an external select code less than 32.  The hardware installation manual
     describes the procedure for setting these values.

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

BUGS
     This driver has not been tested with all possible combinations of frame
     buffer boards and scan boards installed in the device.

OpenBSD 4.7                     March 26, 2008                               1
