Installation
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2.4 Jumper and DIP Switch Description
You can change the ACL-7225's input signals and base address by
setting jumpers and DIP switches on the card. The card's jumpers and
switches are preset at the factory. Under normal circumstances, you
should not need to change the jumper settings.
A jumper switch is closed (sometimes referred to as shorted) with the
plastic cap inserted over two pins of the jumper. A jumper is open with
the plastic cap inserted over one or no pin(s) of the jumper.
2.5 Base Address Setting
The ACL-7225 occupies eight consecutive address locations in I/O
address space. Actually, only 4 consecutive address loactions are used.
The base address of the ACL-7225 is restricted by the following
conditions.
1.
The base address must be within the range 200hex to 3FFhex.
2.
The base address should not conflict with any PC reserved I/O
address. see Appendix A.
The ACL-7225's I/O port base address is selectable by an 6 position DIP
switch SW1 ( refer to Figure 2.1). The default base address is set as
Hex 300, which is shown as following figure 2.2. All the possible
combinations of SW1 switch configuration are listed in the table 2.1
below.
SW1 : Base Address = 300
1 2 3 4 5 6
ON
DIP
A8 A7 A6 A5 A4 A3
Figure 2.2 Default Base Address Setting
