Impulse 3405 - Manual (Page 6)

Card Setup
Sealevel Systems VERSA COMM+4/EX Page 3
The second mode of address selection provides the compatibility mode. In this
mode the DIP-switch sets the base address and the adapter occupies 32
consecutive I/O locations. The following table illustrates the location of each
port and its relationship to the other ports.
Note: For switches 1 - 5 to become active, switches 6, 7 & 8 must be set in
the
‘On’ or ‘Up’ position.
Switch Settings
Address lines Æ A9 A8 A7 A6 A5
Address Selected 1 2 3 4 5
280-29F Off On Off On On
2A0-2BF Off On Off On Off
380-39F Off Off Off On On
1A0-1BF On Off Off On Off
2E0-2FF Off On Off Off Off
Figure 2 - 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 2E0 is selected as a base. Address 2E0 in binary is XX 10 111X XXXX
where X = a non-selectable address bit.
Port # Connector Location Address Example (Base=2E0)
1 1 Base+0 2E0-2E7
2 2 Base+8 2E8-2EF
3 3 Base+16 2F0-2F7
4 4 Base+24 2F8-2FF
Figure 3 - Port to Connector Table
1 2 3 4 5 6 7 8
ON
OFF
A9 A5