ACR_BRG
duart_base[DU_ACR] = (duart->mode & ACR_BRG) | duart->acr;
#define GRP_B ACR_BRG
#define MODE0B (MR0_MODE_0|ACR_BRG)
#define MODE1B (MR0_MODE_1|ACR_BRG)
#define MODE2B (MR0_MODE_2|ACR_BRG)
acr = dp->acr | (dp->mode & ACR_BRG);
qvaux_write2(sc, sc->sc_qr.qr_acr, ACR_BRG);
qvaux_write2(sc, sc->sc_qr.qr_acr, ACR_BRG);