Konami

GX Type 1

• Racing Force
• Konami's Open Golf Championship

Both of these games use a special ROZ layer generated by the "PSAC4" custom IC which appears to include a height map.

GX Type 2

• Fantastic Journey

This game (the export version of Gokujou Parodius) uses a protection chip to write to the palette.

GX Type 3

• Soccer Superstars - this might be possible? uses extra video hw. Not thought to be protected.

This game would probably work if the video emulation were simply sorted out a bit more.

GX Type 4

• Run and Gun 2
• Rushing Heroes
• Versus Net Soccer

Each of these games has a Xilinx custom IC (different per game) which primarily acts as a DMA controller, copying things all around work RAM and into the palette and sprite RAM. However, the format of it's operation list is not understood (see the comments in src/mame/drivers/konamigx.c for more details).