User`s guide
DWMBB Adapter
3.14 Diagnostic Features
The DWMBB diagnostic features provide the capability to observe,
test, and verify logic without the use of test equipment, such as
external loopback connectors. The following sections describe and
explain these features.
Figure 3–14 DWMBB Loopbacks
MODULE LOGIC
MASTER
AND SLAVE
SEQUENCERS
VAXBI
CORNER
(BIIC)
V
A
X
B
I
B
U
S
X
M
I
B
U
S
X
M
I
C
O
R
N
E
R
PMRs
MODULE
LOGIC
IBUS
DWMBB/A MODULE DWMBB/B MODULE
DWMBB/A MODULE LOOPBACK
MODULE LOGIC
MASTER
AND SLAVE
SEQUENCERS
VAXBI
CORNER
(BIIC)
V
A
X
B
I
B
U
S
X
M
I
B
U
S
X
M
I
C
O
R
N
E
R
PMRs
MODULE
LOGIC
IBUS
BIIC LOOPBACK
MODULE LOGIC
MASTER
AND SLAVE
SEQUENCERS
VAXBI
CORNER
(BIIC)
V
A
X
B
I
B
U
S
X
M
I
B
U
S
X
M
I
C
O
R
N
E
R
PMRs
MODULE
LOGIC
IBUS
DMA LOOPBACK
msb-0732-91
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