Path: utzoo!attcan!uunet!tut.cis.ohio-state.edu!ucbvax!MWUNIX.MITRE.ORG!mcgurrin
From: mcgurrin@MWUNIX.MITRE.ORG
Newsgroups: comp.sys.apple
Subject: synchronous comm. from GS serial port?
Message-ID: <9003061630.AA26847@mwunix.mitre.org>
Date: 6 Mar 90 16:30:26 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 14

I asked this question about a year ago and didn't get any response, but 
maybe new folks are now on the list.

Is it possible to use the standard GS serial ports to run synchronous 
communications, specifically HDLC?  As I understand it, Appletalk is a
synchronous multiuser protocol, so I would assume the answer is yes, but
have never seen the question addressed.  

Second, I assume, but maybe incorrectly, that one could not use the firmware
calls to do this, but would have to talk directly to the chip.  If so, can
I access the full capabilities of the comm. controller chip, in particular
automatic CRC generation and checking?  Is this documented anywhere?

Thanks to anyone who can help.