I think this belongs in the CPU/mobo forum, because I have a feeling that some piece of legacy hardware has to do with this.<br><br>What is the purpose of having bytes and bits? Wouldn't it be simpler ...

All 1-Wire® devices, including iButton® devices, contain an 8-byte unique registration number in read-only memory (ROM). This registration number is used as a unique network address on a 1-Wire bus.