W100_REG_GRAPHIC_PITCH
w100_reg_write(sc, W100_REG_GRAPHIC_PITCH, 0x00000500);
w100_reg_write(sc, W100_REG_GRAPHIC_PITCH, 0x000003c0);
w100_reg_write(sc, W100_REG_GRAPHIC_PITCH, 0x000003c0);
w100_reg_write(sc, W100_REG_GRAPHIC_PITCH, 0x00000500);