Error Correcting Memory Functional Block Diagram - HP 3000 SERIES II System Service Manual

Maintenance Procedures
lOP
BUS
--,
I
I
.-
/
17 I
I/O
INTERFACE
I
I
I
I
I
I
I
_ _ - J
~
CONTROL
.....
MEMORY
ARRAY po
..
RIW
CONTROL
I
- - - - - - - l
I
COMPARE ..
...
-
--
ADDRESS
~
ADDRESS
...
10/ ADDRESS ADDRESS
~
.- ...
COMPARATOR '" I
10
COUNTER
....
-
o
IN
I/O
o
OUT
..
LOGGING
-
...
1
-
ARRAY
o
OUT
.lira.
, . . - - - - - -
I
FLI PCA
L _
r : - - - - - - -
SMAPCA
I
I
t
I
16,
I
I
I
I
I
,
,
I
I
I
I
I
I
I ;
I
I ~ , I
I
/ 16
ADDRESS
1
10
.Ir
11
5
I
"
,
DATA OUT
ERROR
LOGGING
ARRAY
ERROR
DETECTOR
MULTIPLEXER
r
I I 1 1 1 I I 1 1 I'
, ...
/
10
I ...
ERROR
CORRECTOR
J
17,
~ ADDRESS
~
REGISTER
DATA OUT
16,
,
16/ .. DATA
.-
DATA IN
I ...
REGISTER
--
ERROR
I
I
rFCAPCA- - - - - - - - - - - - - - - -
-1'--'
I
1 ::
CHECK BIT A
r{:>::
4,
I
I I
CHEC
L
MEMORY
I
I
I
CHECK BIT A 4, .- 4/
BIT~r
ARRAY
I
I
I
16,
5 - /
I ,
I
~
+
I
I
I
CHECK BIT/
I
ra.
I
II
ERROR CODE ---./
I
~~-~~~~~~~~~~~~~~-~---~~I-~~~ PARITY GENERATOR
v5
ERROR
>----f
ERROR...
I
I , ) I
CODE
RE~~~-iER
'"
I
I '
ERROR CODE (A'-E')
I
I
L J
l'--~+_1----:5:.;./~~-~.:...;A;:..D;:..D;.;.RE;;;.;S;.;;.S...;.(;;;.;BA..;.;N....;.;K..;.:.
• ...;..A;.;;.0...;..-A;.;;.3.;..)
~ ~~ ~~~_~
_ _
I '
I
I [-\ I
ADDRESS
PARITY
GENERATOR/
CHECKER
-
REFRESH
COUNTER
~ .
PARITY
r::-- . . - - - - .
- - - - · - - - - - - - - l
MCl PCA
I
I
I I
I
t
-LI--r:-'
- r ' - + I - - - - - - l l - - - - - - - - + - - - - -
I
t
J
i
L-~-----------------I:
L
~
FAULT LOGGING
INTERFACE BUS
I
I
I
I
CT L
.-+-
~""'l:1:--7,'f-/--i
BUS
752244
Figure 4-33. Error Correcting Memory Functional Block Diagram
4-53/4-54