MERLIN_VDAC_DATA
vgaw(ba, MERLIN_VDAC_DATA, 1);
vgaw(ba, MERLIN_VDAC_DATA, 0);
vgaw(ba, MERLIN_VDAC_DATA, mode | \
(vgar(ba, MERLIN_VDAC_DATA) & 0x0f)); \