Fast Unibus Sync Serial?

Paul Koning paulkoning at
Wed Apr 27 06:54:02 CDT 2016

> On Apr 26, 2016, at 10:47 PM, Ken Seefried <seefriek at> wrote:
> From: Paul Koning <paulkoning at>
>> HDLC is ok so far as it goes, but DDCMP is superior in every respect.  The only reason
>> to use HDLC is that you need to talk something that can't be made to speak DDCMP.
> Like a Cisco router without the DECnet feature set?  Or pretty much
> anything that doesn't speak DECnet?

Sure, but then you also need to worry about implementing the higher layer protocols.  HDLC may be the least of your worry.


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