Hp Integrated Opengl Interface Board - HP Vectra XW Technical Reference Manual

3 Interface Boards and Mass-Storage Drives

HP Integrated OpenGL Interface Board

HP Integrated OpenGL Interface Board
OpenGL is the current standard 3D application programming interface
(API). It is a graphics language for describing three-dimensional objects.
The HP Integrated OpenGL Interface Board has a processor that executes
OpenGL 3D graphics instructions autonomously of the main processor. It
consists of an AccelGraphics Accel Pro TX2500 graphics controller, which
can be characterized as follows:
• 100% hardware- and BIOS-compatible with IBM
• 64-bit video memory access
• Hardware acceleration of graphical user interface (GUI) operations
through a bit-block transfer mechanism
• Standard and Enhanced Video Graphics Array (VGA) modes
The pin-out of the VGA connector is given on page 32.
The electrical requirements of the board are 5 V (± 5%), 5.0 A, 25 W.
3DLabs
RAMDAC
Glint 500 TX
Avance Logic
VGA
H7
VRAM -frame buffer- memory
*
chips on front and back
make total of 8MB
All jumper settings
are factory-set to the
default setting, and must
NOT be changed.
* Neither the frame buffer nor the local buffer can be upgraded
The graphics board cannot be upgraded or reconfigured by the user, or by
HP personnel. Changes to the configuration are not supported. Make sure
that the jumpers and daughter board are configured as set by the
manufacturer.
22
H0 H4 H6
...
... ...
3DLabs
BIOS
Delta
Function
H0 EPROM Address
H1 Local Buffer Visible Region
H2 Frame Buffer Visible Region
H3 Local Buffer Width
H4 Local Buffer Width
H5 Local Buffer visible Region
H6 Local Buffer visible Region
H7 on-board VGA enable/disable
®
VGA display standard
H3 H5 H1
... ......
...
DRAM -local buffer- memory
H2
*
chips on and under daughter board
make total of 8MB
Default Setting
1-2
1-2
2-3 (8 MB)
2-3 (8 MB)
2-3 (8 MB)
2-3
2-3
1-2 (enable)