Fast Unibus Sync Serial?

Ken Seefried seefriek at
Tue Apr 26 21:47:03 CDT 2016

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?


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