[comp.sys.ibm.pc.programmer] Need to get a PC talking DDCMP

jrv@demon.siemens.com (James R Vallino) (03/24/90)

I have the task of getting my PC connected to an old PUMA robot controller.
The supervisory host connection uses a serial connection and the DDCMP
protocol.  I would appreciate a lead to an implementation of this protocol
on a PC.  Free or for cold cash doesn't matter.  I just don't want to write
some more communications code if I can avoid it.

Also, where can I get a description of the protocol?  Is it buried in some
documentation from DEC or is there another reference available?


Jim Vallino	Siemens Corporate Research, Inc., Princeton, NJ
jrv@demon.siemens.com
princeton!siemens!demon!jrv
(609) 734-3331

koning@koning.dec.com (Paul Koning) (03/27/90)

In article <26877@siemens.siemens.com>, jrv@demon.siemens.com (James R
Vallino) writes:
> 
> I have the task of getting my PC connected to an old PUMA robot controller.
> The supervisory host connection uses a serial connection and the DDCMP
> protocol.  I would appreciate a lead to an implementation of this protocol
> on a PC.  Free or for cold cash doesn't matter.  I just don't want to write
> some more communications code if I can avoid it.

DECnet/DOS supports DDCMP, though the direct ("raw") interface to the DDCMP
routines is undocumented.

> Also, where can I get a description of the protocol?  Is it buried in some
> documentation from DEC or is there another reference available?

The protocol spec is a published document (no hairy restrictions on its
availability,
same as we do in general with DECnet specs).  The order number is AA-K175A-TK, 
"DNA Digital Data Communications Message Protocol (DDCMP) Functional
Specification".

	paul koning