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MAINTENANCE
Table 3·3:
Memory Diagnostic Tests (continued)
+· - . ·+- ......... - - .••......•..... - .•••................•.•...... ·+
:TEST! DESCRIPTION
+· .. ·+·. - - - ...... - .. - ... - ... - - ....... - .....•... - - . - .•.......... ·+
5
MEMORY ADDRESS TEST PART 3 .. The
16 kB
bank
number
is
written and verified, one byte at a time.
6
MEMORY ADDRESS TEST PART 4 ·· The two's
complement
16 kB
bank number is written and verified, one byte at a time.
7
8
9
10
WORST
CASE
NOISE
TEST ··A
series
of
stuck-at-1,
and
worst-case
word
parity
written and verified, one word at a time.
stuck-at-0,
patterns
are
MEMORY PARITY TEST ·· Forced bad parity, together
set
of
worst-case patterns, is written into each
memory.
This test is executed only if the
parity
is enabled, by entering an ENABLE PARITY command.
DATIO TEST
..
Uses the Q22-bus
DAT IO
function
to
memory data, one word at a t irne.
DATIOB TEST
.
-
uses the Q22-bus DAT I OB function
to
memory data, one byte at a time.
with
a
byte in
option
write
write
11
INSTRUCTION EXECUTION TEST .. Executes a series of
simple
instruction sequences, from locations throughout memory.
12
MARCHING
ONES
AND
ZEROS
TEST .. Exercises
each
16 kB
memory
bank
by
writing
and
reading
several passes of
alternating bytes of ones and zeros.
Memory
refresh
and
quadword memory references are also checked.
+·. - ·+- ....... - ... - ...... - ..... - - . - ... - ......... - ..... - . - ...... ·+
3.2.3.l
Running The Memory Diagnostic · The
diagnostic
control
keys, commands, and options are described in Tables 3-4, 3-5, and
3.
6.
3-10
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