[fa.info-vax] VAX PSI and KMS-11's

info-vax@ucbvax.ARPA (03/06/85)

From: engvax!KVC@cit-vax

Anyone out there have any experience with the VAX PSI and KMS-11 boards?
I've been running the PSI for awhile on both the KMS-11P and KMS-11BD, but
only at 9600 baud.  We want to crank it up to 56kb, but have heard rumours
that the KMS-11's have problems at such speeds.  Can anyone confirm or
(hopefully) deny this?  Also, what sort of system overhead does PSI become
when running through a KMS-11 at 56kb?  We weren't able to detect any
measurable overhead at 9600...

The KMS-11 BD supports multiple lines (up to 8 I think).  I've never tried it
with more than one.  Does it work with 2 or more?  Our ultimate goal is to
run 2 56kb lines into a 785 running VAX PSI.  Can the BD handle this?  From
what I can tell, the P board is roughly half the cost of a BD.  Could anyone
comment on the usefulness of perhaps running 2 P boards (at 56 kb each) rather
than one BD?  I realize that that would take up 4 UNIBUS slots instead of 3, but
if the BD could not keep up with 2 56k lines, it may be the only solution.

	/Kevin Carosso                   engvax!kvc @ CIT-VAX.ARPA
	 Hughes Aircraft Co.