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MAINTENANCE
Table 3·7:
VDS Comm.and Summary (continued)
+· .........•.•. - . ·+· - - - - - - - - - - - . - - - .....•.. - . - •.• - - - - - - - - •. - ..• ·+
I COMMAND/
I DESCRIPTION
!
QUALIFIER
l
+· ...... - .. - - - - . - ·+· .• - - . - - - - - - - .. - - .• - .... - . - - - - - - - . - - - - - - - - .. ·+
/PASSES•n
Where n is the number of times the diagnostic
will be run.
/SECTION-name
SET EVENT FLAG n
SELECT
Where name is the specific test or section of
the diagnostic selected for execution.
Where n specifies a specific test condition.
Identifies the UUT (unit under test).
+· ... - .. - .... - ... ·+·. - .. - - . - ....•. - .• - - - ...... - . - - - - .. - . - - . - - . - ·+
3.3.l
VCBOl Diagnostic (EHXVS)
The diagnostic comprises 14 tests/routines
(described
in
Table
3-8).
The
tests are structured in nine sections; four ·of which
are selectable (Table 3·9).
The monitor
screen
should
be
observed
while
the
tests
are
running,
to
verify correct operation.
More specifically, Tests
12, 13, and 14 require visual verification.
Error messages are displayed in standard VDS format.
When
there
is no apparent output or activity for certain tests, the keyboard
WAIT LED is turned-on, to indicate that the software is running.
Table 3·8:
VCBOl Diagnostic Tests
+·. -
-+· .. - ..... - - • - ....•••..... - ....•.... - • - .•.•.... - ... - - .• - •. ·+
TEST! DESCRIPTION
i
+ •.••
+ •••••••••••••••••••••••••••••••••••••••••••••••••••••••••• +
l
REGISTER PROBE TEST ·· Performs
an
access
test
on
the
VCBOl
I/O registers residing on the Q22-bus.
The test is
checking for bus time-outs
resulting
from
the
register
probe.
2
BITMAP MEMORY TEST ·· Performs byte,
word,
and
longword
read/write
operations
on
the
512 kB
on-board
memory.
Memory addressing, time-outs, and invalid memory responses
are
~becked.
using
alternating
ones-and-r1ros
data
patterns.
3-16
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