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The OMG-ULTRA-SIO contains several jumper straps that must be set for
proper operation.
Address Selection
Each port on the OMG-ULTRA-SIO occupies eight consecutive I/O locations. A
DIP-switch is used to set the base addres s for these locations. SW1 sets the I/O
address for port 1 and SW2 sets port 2. The following table shows the
addressing options available. If different address options are required, please
contact Technical Support about a custom PAL option.
3F8
2F8
3E8
2E8
2A0
300
328
Disabled
Figure 1 - Address Selection Table
Note: Each COM: port in the system should have a unique address. Typically
COM1: - COM4: addresses are 3F8, 2F8, 3E8 and 2E8 Hex.
Refer to Appendix A for common address contentions.
Port Enable / Disable
Each port on the OMG-ULTRA-SIO can be enabled or disabled with switch
position 4 on the DIP-switch. The port is enabled with the switch 'On' and
disabled when 'Off'. If any port is disabled, be sure to disable the interrupt
request for that port by removing the IRQ jumper.
OMG-ULTRA-SIO
Card Setup
1
2
3
4
On
On
On
On
On
On
Off
On
On
Off
On
On
On
Off
Off
On
Off
On
On
On
Off
On
Off
On
Off
Off
On
On
Off
Off
Off
Off
Card Setup
Page 2
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