Hi Folks,
One of our instruments was built some 10 years ago and uses an interface
conforming to the DR11-W to attach to a MicroVAX III through a CSPI array
processor. Actually, it was attached to a fast version of a DR11-W on
the array processor developed by CSPI. We are looking at moving this to
an Alphastation 5-500/333, and have found a DR11 type interface for the
PCI bus. The board almost just dropped in and played immediately, with
a small problem. During a transfer, any kind of activity on the CDE will
cause the transfer to hang up. This workstation is running under DUNIX
4.0D. The array processor did not have this problem, as it was only
running one program at a time, without ever having to worry about
resource sharing. I'm thinking of installing the real time options to
try to implement memory locking and fixed priority scheduling. However,
I wonder if there is something I can do to prevent the graphics system
from interrupting transfers? It seems like something as simple as a
mouse movement can interrupt the transfers, and bringing a window from
the back to the front can positively clobber it. Are there any kernel
directives I can issue in the driver to prevent bus interruptions from
other devices? Also, where can I find those load sets for the real time
options? Is it a separately licensed product?
thanks in advance,
eyc
Received on Wed Oct 21 1998 - 23:08:25 NZDT