Card setup – Impulse 3189 User Manual
Page 5
Card Setup
Sealevel Systems ULTRA-SIO Page
2
Card Setup
The Ultra-SIO contains several jumper straps that must be set for proper operation.
Address Selection
Each port on the Ultra-SIO occupies eight consecutive I/O locations. A DIP-switch is used to set the base address
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 Sealevel Systems Technical
Support about a custom PAL option.
1 2 3 4
3F8 On On On On
2F8 On
On
Off
On
3E8 On
Off
On
On
2E8 On
Off
Off
On
2A0 Off On On On
300 Off On Off On
328 Off
Off
On
On
Disabled Off Off Off Off
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 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.