[SiriusHardware]

Agreed, I've already mentioned a couple of non Tesla / Non Nat-Semi alternatives in a previous post in this thread. They also have their own distinct programming regimes but are compatible with the others in read mode.

My objection was to Tesla giving their device almost the same device number as the original National Semiconductor device thereby strongly suggesting (intentionally or otherwise) that their device is a direct electrical / electronic substitute for the DM (Nat Semi) device, but then not adopting the same programming regime.

I realise there's no rule which says they had to, but it would have been a sensible thing to do. The difficulty (and the reason for this thread) is that there does not seem to be a single good source for information about the programming regime for the Tesla devices.