LCDCON1_ENVID
reg &= ~LCDCON1_ENVID;
lcdcon1 &= ~(LCDCON1_BPPMODE_MASK|LCDCON1_ENVID);
bus_space_write_4(iot, ioh, LCDC_LCDCON1, lcdcon1 | LCDCON1_ENVID);
~LCDCON1_ENVID &