NAME    [Toc]    [Back]

     gbox - HP98700 ``Gatorbox'' frame buffer

SYNOPSIS    [Toc]    [Back]

     gbox* at intio?
     gbox* at dio? scode ?
     grf*  at gbox?

DESCRIPTION    [Toc]    [Back]

     The HP98700 and HP98710 are 4-bit color frame buffers,  also
known as the
     Gatorbox.   They  can  be  extended  to  8-bit color with an
HP98701 frame
     buffer extension.  The 98710 also has some acceleration features.

     The  gbox  driver provides a frame buffer abstraction to the
grf(4) driver,
     and the associated ite(4) console framework.

     The 98700 can be used as the only graphics device on a  system, in which
     case  it will be used as the system console.  It can also be
installed as
     a  secondary  display  device.   For  the  first  case,  the
HP98287A M.A.D.  interface
  card should be set to internal control space.  This
will put the
     frame buffer at the DIO address  0x200000  and  the  control
registers at
     0x560000.  At this address it will be the ``preferred'' console device
     (see cons(4)).  For use as a secondary  device,  the  98287A
should be set
     to  frame buffer address 0x300000, and to an external select
code.

     It should be noted that  this  configuration  will  conflict
with the 98547
     display card which has a 2 megabyte frame buffer starting at
address
     0x200000.  The 98700 should only be installed as a secondary
device in a
     machine with a 1 bit 98544 display card or 4 bit 98545 card.
The 98700H
     Installation Guide contains further  configuration  information.

SEE ALSO    [Toc]    [Back]

     ioctl(2),  dvbox(4),  grf(4),  hyper(4),  intro(4), rbox(4),
topcat(4)

OpenBSD     3.6                          March      16,      2003