NV8_ATTRDATR
#define ATBR(A) (NV_REG8(NV8_INSTAT1), NV_REG8(NV8_ATTRINDW) = ((NVATBX_##A) | 0x20), NV_REG8(NV8_ATTRDATR))
*reg = NV8_ATTRDATR;