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The system support connectors must be fitted with a suitable “Venus” I/O
shield. ATX-compatible motherboards have various core I/O shield
designs. The UP2000 utilizes the design shown in Figure 3-3.
Individual connectors are designated with letters. Each connector type
and its description are listed in Table 3-4.
Figure 3-3
I/O Shield
25.4 mm (1.0 in)
25.4 mm (1.0 in)
16.4 mm (0.64 in)
8.0 mm (0.31in)
25.6 mm (0.4 in)
159
.0
mm
(6.
26 i
n
)
145
.2 m
m
(2X 5
.7 i
n
)
12
7.0
m
m
(3X 5.0
i
n
)
97
.6
mm
(3.
84 i
n
)
61
.4
mm
(2.
42 i
n
)
29.1 mm (1.14 in)
10.1 mm (2X 0.4 in)
79
.4
mm
(3.
12 i
n
)
Table 3-4
RearPanel I/O Connectors
Letter
Connector Description
A
PS/2 Stacked Mouse/Keyboard (DIN)
B
Dual Stack USB
C
Stacked Parallel (25 Pin D-Sub)
D,E
Serial (9 Pin D-Sub)
WARNING: COM1 is reserved as a serial console device. All other serial devices
must be connected to COM2 or to expansion ports. The RS232 Ring
Indicator signal on COM1 is connected to the Reset function on the
UP2000 Motherboard.