Re: zilog 8530 SCC based cards

Alan Cox (alan@lxorguk.ukuu.org.uk)
Mon, 15 Jun 1998 11:44:31 +0100 (BST)


> * AX.25 uses HDLC. So the basic difference is just the encapsulation, right?
> (Maybe the FCS is different, but it should be trivial to make that
> configurable).

HDLC defines the FCS. And the 8530 itself does most of the work at the
per byte level

> * Is it easy/difficult/impossible to have different encapsulations with the
> same driver?

Its not impossible. The driver can respond to config ioctls and can also hand
upwards frames with different protocol types

> * Such sync hdlc lines do operate full duplex, don't they?

Normally

Alan

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