Impulse SIO-104+2 (3502) User Manual download pdf (Page 4)

Card Setup

Sealevel Systems SIO-104+2 Page 2

Card Setup

The SIO-104+2 contains two DIP-Switches and a jumper strap for each port, which must be set for proper

operation.

Switches SW1A and SW2A

Address Selection

Each port on the SIO-104+2 occupies eight consecutive I/O locations. A DIP-switch is used to set the base address

for these locations. SW1A sets the I/O address for port 1 and SW2A 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

3F8 On On On

2F8 On On Off

3E8 On Off On

2E8 On Off Off

2A0 Off On On

300 Off On Off

328 Off Off On

Disabled 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 SIO-104+2 can be enabled or disabled by setting the three switches in the ‘Off’ position. The port

is enabled when a valid I/O selection is made. If any port is disabled, be sure to disable the interrupt request for that

port by removing the IRQ jumper.

1 2 3 4 5 6 7 8 9 ... 17 18

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Impulse SIO-104+2 (3502) User Manual Page 4