TULIP_SP_MAC
sp[39] = TULIP_SP_MAC(eaddr[0]);
sp[40] = TULIP_SP_MAC(eaddr[1]);
sp[41] = TULIP_SP_MAC(eaddr[2]);
*sp++ = TULIP_SP_MAC(((u_int16_t *)addrp)[0]);
*sp++ = TULIP_SP_MAC(((u_int16_t *)addrp)[1]);
*sp++ = TULIP_SP_MAC(((u_int16_t *)addrp)[2]);
*sp++ = TULIP_SP_MAC(0xFFFF);
*sp++ = TULIP_SP_MAC(0xFFFF);
*sp++ = TULIP_SP_MAC(0xFFFF);
*sp++ = TULIP_SP_MAC(eaddr[0]);
*sp++ = TULIP_SP_MAC(eaddr[1]);
*sp++ = TULIP_SP_MAC(eaddr[2]);