GCT_ID_COLOR_COMPARE
WGfx(ba, GCT_ID_COLOR_COMPARE, 0x00);
WGfx(ba, GCT_ID_COLOR_COMPARE, 0x00);
WGfx(ba, GCT_ID_COLOR_COMPARE, 0x00);
WGfx(ba, GCT_ID_COLOR_COMPARE, 0x00);
WGfx (ba, GCT_ID_COLOR_COMPARE, 0x00);
regs->grf[GCT_ID_COLOR_COMPARE] = 0x00;