HP 9030 User Manual

2-26 Theory of Operation
All mapped addresses are sent to the healer CAM, which compares each mapped address to all
addresses of failed locations. Healer CAM addresses of failed locations have bit 0 set.
When all 32 locations of the healer are full, no further healing or automatic changes to the healer
CAM occur on that Memory Controller. When all healer locations have been used, the healer
overflow bit
in the MC status register is set. When all healer locations are full, the operating system
checks each healed location to determine
if the location is still faulty. If the location fault was caused
by a momentary failure, the overflowed
CAM can be cleared and reused by the operating system.
o
HEALER CAM
(ADDRESS)
•
•
•
31
1
31
..... --------~ ......
/
/
/
( 0 1 10 11
......
o
HEALER RAM
(DATA)
31 32 39
DATA
I C~ii: 1
0
'--- ______ ~11
•
•
•
~ _____________________ ~131
......
......
......
......
......
......
......
......
......
......
X AND Y ADDRESS Ix X xl
A
r---...., ...... ---,
L ~ PHYSICAL MEMORY ADDRESS-----.J
r-- (18 BITS) ~
1-HEALED LOCATION
X-DON'T CARE
Figure 2-15. 1 Megabyte Memory Healing
lOP Bus
A 50-conductor lOP ribbon cable interconnects the motherboard with the lOP in slot #2. The lOP
handles internal modules as well as the 110 backplane. Eight select codes are available per lOP.
Select code 7 is assigned to the system control module, leaving seven select codes available to the
user at the seven
110 backplane slots. Select codes 0-6 correspond to backplane slots 0-6, respec-
tively. The backplane slots are physically labeled with the select code numbers.

HP 9030 Specifications

General

Brand	HP
Model	9030
Category	Desktop
Language	English