problems with Sunlink MCP Board

[Arch Mott]

Hello Sun World.....

I am using a Sunlink MCP (multiprotocol comm. processor) in a Sun 3/160 to
run Sun's Sunlink bscrje software. In the past, I had used ports 2 & 3
(RS-232 ports) for 2 different RJE links with a fair amount of success
(i.e.  it worked, and seemed to offload some processing from the cpu).
Today, I moved one of the RJE lines from port 2 to port 0 (RS-449) using
an adapter I got from the black box catalog (The cable is RS-232) in order
to put a line-printer on port 2. The printer works, the RJE line on port 3
still works but when I start the bscrje process on port 0, I see so much
more activity on my cpu that I won- der if I haven't done something wrong.
When I was running just the two bscrje processes on ports 2&3, I saw
virtually no cpu load. Also, the number of inter- rupts processed shoots
through the roof as soon as I start the bscrje on port 0.

Has anyone else experienced similar problems? Does anyone have any sug-
gestions as to what I or Sun may have done wrong? I placed a service call,
but figured while I wait a week or so for Sun to return my call I'd post
to the net and see what happened.

Thanks for everything,

	Arch Mott
	Solar Energy Research Institute
	1617 Cole Boulevard
	Golden, CO 80401
	(303) 231-7687