Impulse 4030 - Manual (Page 6)

© Sealevel Systems, Inc. - 4 - PIO-48 User Manual
Card Setup
The PIO-48 contains several jumper straps for each port that must be set for proper
operation.
Address Selection
The PIO-48 occupies 8 consecutive I/O locations. Dip-switch SW1 sets the
base address for the PIO-48. Be careful when selecting the base address as
some selections conflict with existing PC ports. The following table shows
several examples that usually do not cause a conflict.
Address Binary Switch Settings
1 2 3 4 5 6 7 8
280-287 10 1000 0XXX Off On Off On On On On On
2A0-2A7 10 1010 0XXX Off On Off On Off On On On
2E8-2EF 10 1110 1XXX Off On Off Off Off On Off On
2F8-2FF 10 1111 1XXX Off On Off Off Off Off Off On
3E8-3EF 11 1110 1XXX Off Off Off Off Off On Off Off
300-307 11 0000 0XXX Off Off On On On On On Off
328-32F 11 0010 1XXX Off Off On On Off On Off On
3F8-3FF 11 1111 1XXX Off Off Off Off Off Off Off On
Typically COM1: = 3F8h; COM2: = 2F8h; COM3: = 3E8h; COM4: = 2E8h.
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 is selected as the base address. Address 300 in binary is 10 0000 XXX where X
= a non-selectable address bit and address bit A9 is always a 1.
DIP-Switch 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’.