NM_HEX
'x', MDB_OPT_SETBITS, NM_HEX, &optf,
if ((optf & (NM_DEC | NM_HEX | NM_OCT)) == 0) {
optf |= NM_HEX;
switch (optf & (NM_DEC | NM_HEX | NM_OCT)) {
case NM_HEX: