Updates 0.91:
-Fixed gamma correction.
-Warns when battery is low.
-Checks for available memory.
-Better IWAD detection.
-Added -fixvid command-line parameter for troubleshooting purposes. (ARM only)
-Overlay automap. ZDoom style

If you are having problems with HPC Doom, use the -fixvid command-line parameter. This will use a pre-defined series of settings that should work on all Jornada 710/720/728.
http://home.freeuk.com/gamefreaks/pql/