WA_SGR1_MASK
if (set_a_attributes != (char *) 0 && (attr & WA_SGR1_MASK)) {
ATTR_STATE &= ~WA_SGR1_MASK;
ATTR_STATE |= attr & WA_SGR1_MASK;
ATTR_STATE &= ~WA_SGR1_MASK;
ATTR_STATE |= attr & WA_SGR1_MASK;