MLY_SLOT_START
mc = &sc->mly_command[slot - MLY_SLOT_START];
mc = &sc->mly_command[slot - MLY_SLOT_START];
mc->mc_slot = MLY_SLOT_START + i;
tabofs = ((mc->mc_slot - MLY_SLOT_START) * MLY_MAX_SGENTRIES);
#define MLY_SLOT_MAX (MLY_SLOT_START + MLY_MAX_COMMANDS)