M750_UNCORR
#define M750_ENA(mcr) ((mcr)->mc_err = (M750_UNCORR|M750_CORERR), \
#define M750_ERR(mcr) ((mcr)->mc_err & (M750_UNCORR|M750_CORERR))
printf("mcr0: %s", err & M750_UNCORR ?