NVRAM_HOSTID
if (readNVRAM (fd, NVRAM_HOSTID) & HOSTID_VALID) {
printf ("%d\n", readNVRAM (fd, NVRAM_HOSTID) ^ HOSTID_VALID);
writeNVRAM (fd, NVRAM_HOSTID, bootpref[ARRAY_HOSTID] |
printf ("%d\n", readNVRAM (fd, NVRAM_HOSTID) ^