Card Setup
Sealevel Systems
PCIO
Page
2
Card Setup
The
PCIO
contains several jumper straps which must be set for proper
operation.
Serial Port Address Selection
The serial port on the
PCIO
occupies 8 consecutive I/O locations. A
DIP-switch is used to set the base address for these locations. Be careful
when selecting the base address as some selections conflict with existing
ports. The following table shows several examples that typically do not
cause a conflict. SW2 sets the I/O address for the serial port.
Address
Binary
Switch Position Setting
Hex
A9
A0
1
2
3
4
5
6
7
280-287
1010000XXX
Off
On
Off
On
On
On
On
2A0-2A7 1010100XXX
Off
On
Off
On
Off
On
On
2E8-2EF
1011101XXX
Off
On
Off Off
Off
On
Off
2F8-2FF
1011111XXX
Off
On
Off Off
Off
Off
Off
3E8-3EF
1111101XXX
Off
Off Off Off
Off
On
Off
300-307
1100000XXX
Off
Off
On
On
On
On
On
328-32F
1100101XXX
Off
Off
On
On
Off
On
Off
3F8-3FF
1111111XXX
Off
Off Off Off
Off
Off
Off
Figure 1 - Address Selection Table
The following illustration shows the correlation between the DIP-switch
setting and the address bits used to determine the base address. In the
example below, address 300 Hex is selected as a base. Address 300 in
binary is XX11 0000 0XXX where X = a non-selectable address bit.
ON
1
2
3
4
5
6
7
8
EN
A3
A9
Figure 2 - DIP-Switch SW2 Illustration
Note:
Setting the switch ‘On’ or ‘Closed’ corresponds to a ‘0’ in the
address, while leaving it ‘Off’ or ‘Open’ corresponds to a ‘1’.
Refer to Appendix A for common address contentions.
Содержание PCIO 4035
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