InfiniteReality: The Graphics Engine EEPROM Commands
The Onyx2 and Onyx3 Graphics Engine EEPROM
The Graphics Engine (GE) on SGI Onyx2 and Onyx3 Infinite Reality (IR) systems store microcode in EEPROM. In addition to microcode that enables the Graphics Engine, the EEPROM stores specific user defined video format combinations prepared with the InfiniteReality Video Format Combiner, ircombine.
ireeprom is a command-line tool that allows users with root level privileges access to the Onyx2 InfiniteReality Graphics Engine microcode. With ireeprom, the contents of the IR GE EEPROM can be queried, verified, erased/reset to the default state, or flashed to a older/newer microcode revision. ireeprom does not have a man page; some of its functions will be described here.
ireeprom Command Options
ireeprom supports the following command options:
-c - erase the video combination stored in the EEPROM -e - erase the EEPROM (use with caution) -f <path to EEPROM microcode file> - the microcode file is typically /usr/gfx/ucode/KONA/tport.bin -F - force overwrite of same/older version of microcode -h - help -i - information: prints current EEPROM info -p <pipenumber> - specify pipe in multi-pipe systems (pipe numbering typically begins at 0) -r - read the contents of the EEPROM into a file -v - verify the contents of the EEPROM -w - write a file to the EEPROM (see -f)
As root, change to the directory that contains ireeprom:
Typical Uses of ireeprom
In multi-pipe systems, the -p n to specify a pipe (n is replaced with the pipe number - note the space between the p and the number.)
Check Current Microcode Revision
Included in the output will be the microcode "State" (good or bad) and "Revision".
Flash the GE EEPROM
./ireeprom -w -f /usr/gfx/ucode/KONA/tport.bin
If you wish to re-flash the EEPROM with the same (or an older) microcode revision, include the -F option.
You must stop and restart the graphics sub-system to successfully to load the microcode to the EEPROM:
Erase Bad Combination Files that May Prevent Display of Graphics
Loss of graphics output can be the result of a bad combination file or the use of a particular graphics resolution not supported by your monitor. If after loading a combination file, or using the Onyx2 (or GE board) for the first time, your monitor fails to display output, you can erase and reset the EEPROM:
then stop and restart the graphics subsystem to restore a default combination with a resolution of 1280x1024