Tadpole VIPER, User Manual

Page: 189 / 210

VIPER ATI display controller
The VIPER ’s ATI display controller allows it to
drive an external monitor. In some combinations, the
VIPER can drive both the LCD and an external monitor
simultaneously.
This list charts the various combinations and the OBP
commands to activate them.
OBP/CDE Command LCD Resolution External Monitor
800-mon * NOT SUPPORTED 800x600 60Hz
800-vesa * NOT SUPPORTED 800x600 60Hz
1024-mon * OFF 1024x768 60Hz
1024-vesa * OFF 1024x768 60Hz
1152-mon NOT SUPPORTED 1152x900 66Hz
1152-vesa NOT SUPPORTED 1152x900 66Hz
1280-mon NOT SUPPORTED 1280x1024 67Hz
1280-vesa NOT SUPPORTED 1280x1024 67Hz
1280-fastmon NOT SUPPORTED 1280x1024 76Hz
1280-fastvesa NOT SUPPORTED 1280x1024 76Hz
lcd-only 1024x768 60Hz OFF
lcd+monitor 1024x768 60Hz 1024x768 60Hz
lcd+vesa 1024x768 60Hz 1024x768 60Hz
lcd-off OFF NO CHANGE
lcd-on 1024x768 60Hz NO CHANGE
monitor-off NO CHANGE OFF
monitor-on NO CHANGE ENABLED AT CURRENT
RESOLUTION
csync-on OFF COMPOSITE SYNC
ENABLED
csync-off OFF COMPOSITE SYNC
DISABLED
* = Not supported by window manager display control
NOTE:
The VIPER supports simultaneous on-board and
external video device display using VESAstandard 1024 x
768 x 60 Hz mode and timing.
VIPER Product Family User’s Guide 163
Appendix B
External Monitor Matrix
VIPER ATI display controller
Exter
nal Monitor
Matrix