OUT_CS_REG(R300_ZB_BW_CNTL, 0x00000000);
OUT_CS_REG(R300_ZB_DEPTHCLEARVALUE, 0x00000000);
OUT_CS_REG(R300_ZB_HIZ_OFFSET, 0x00000000);
OUT_CS_REG(R300_ZB_HIZ_PITCH, 0x00000000);
OUT_CS_REG(R300_ZB_BW_CNTL, 0x00000000);
OUT_CS_REG(R300_ZB_DEPTHCLEARVALUE, 0x00000000);
OUT_CS_REG(R300_ZB_HIZ_OFFSET, 0x00000000);
OUT_CS_REG(R300_ZB_HIZ_PITCH, 0x00000000);