gbox - HP98700 ``Gatorbox'' frame buffer
gbox* at intio?
gbox* at dio? scode ?
grf* at gbox?
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
buffer extension. The 98710 also has some acceleration features.
The gbox driver provides a frame buffer abstraction to the
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
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
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
It should be noted that this configuration will conflict
with the 98547
display card which has a 2 megabyte frame buffer starting at
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.
Installation Guide contains further configuration information.
ioctl(2), dvbox(4), grf(4), hyper(4), intro(4), rbox(4),
OpenBSD 3.6 March 16, 2003
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