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

NAME
     rbox - HP98720 Renaissance frame buffer

SYNOPSIS
     rbox*      at intio?
     rbox*      at dio?
     wsdisplay* at rbox?

DESCRIPTION
     The HP98720 and HP98721 are stackable 4-bit color frame buffers, also
     known as the Renaissance.  By adding up to 7 HP98722A frame buffer exten-
     sions, it is possible to add overlay planes.

     The rbox driver provides a frame buffer abstraction to the wscons(4) con-
     sole framework.

     The Renaissance 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
