Data General AViiON 5500 Series, Installing, Expanding, And Maintaining

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Preparing a replacement system board
8-9
014–002250–01
7. Verify the position of the synchronous serial port jumpers (
P3
,
P4,
P5, P6 , and P10 ). These jumpers configure the SYNC port for your
release of the DG/UX operating system. Figure 8–10 illustrates
configuration options for the synchronous operation jumpers.
IMPORTANT: For synchronous applications to work correctly with DG/UX 5.4
Release 3.00 or greater, you must change the default jumper
configuration.
By default, jumpers are installed on P3 and P6 . To use the
synchronous port with DG/UX 5.4 Release 3.00 or greater, install a
jumper on pin
P5 . You may use any stored jumper (one that is
attached to only one pin on a jumper location that should be empty).
Contact your Data General representative if an unused jumper is
not available.
P6 P5 P4 P3 P10
Before DG/UX 5.4R3.00
P6 P5 P4 P3 P10
DG/UX 5.4R3.0
or later
Figure 8–10 Configuring the synchronous operation jumpers