KBR_ACK
case KBR_ACK: case KBR_ECHO:
if (c == KBR_ACK || c == KBR_ECHO) {
KBR_ACK, KBC_AUXENABLE) )
KBR_ACK, KBC_RESET)) != 0 ) \
case KBR_ACK:
if (data != KBR_ACK && data != KBR_RESEND)