Data General AViiON Series, Customer Documentation

Page: 32 / 210

Preparing to Install VME Options
1-12
014–001867
Table 1–2 Board Slot Priority – Two–Slot Systems*
Board Name Priority
VTC High
VDA/128 or VDA/255
VSC/3
VAC/16
VSC/3i
VLC or VLCi
VTRC
VFC
VSA
Low
*
This table does not apply for systems with more than two VMEbus
slots, refer to Appendix E for a detailed discussion of priority
assignments
.
When boards are jumpered for the same
Interrupt or Bus Request level, the board closest to the
system board has the highest priority.
Viewed from rear of computer
1 2 3
System and
Non-VME
boards
VME board
slots
M
E
M
O
R
Y
O
P
T
I
O
N
S
V
S
C
/3
V
A
C
/
16
O
P
T
I
O
N
O
P
T
I
O
N
Viewed from rear of computer
1 2 3
System and
Non-VME
boards
VME board
slots
M
E
M
O
R
Y
O
P
T
I
O
N
S
(4)
S
Y
S
T
E
M
B
R
D
.
a
n
d
/
o
r
V
M
E
A
R
B
I
T
E
R
S
Y
S
T
E
M
B
R
D
.
a
n
d
/
o
r
V
M
E
A
R
B
I
T
E
R
Figure 1–5 Board Slot Assignment Map