Chapter 3: Hardware Configuation and Installation
Manual Number: 00650-014-4
Page 3-5
Setting the Base Address
The AD12-8 base address is selected by DIP switch S1 located in the lower right hand portion of
the card. Switch S1 controls address bits A3 through A9. Bits A0 through A2 are used for the eight
address locations in I/O space required by the AD12-8. The following procedure will show you
how to set the base address. See
FIGURE 3-3: BASE ADDRESS EXAMPLE
below, for a
graphic representation of this example.
1. We will use base address 300 hex as an example. Determine the binary representation for your
base address. In our example, 300, the binary representation is 11 0000 0000. The conversion
multipliers for each binary bit are contained in
FIGURE 3-3
for reference.
2. Locate switch S1 on the lower right side of the card. Note there are seven switches, which will
be used to set the seven most-significant bits in the binary representation from step 1).
3. Note from
FIGURE 3-3
that switch position A9 corresponds to the most significant bit in your
binary representation. For each bit in your binary representation, if the bit is a one, turn the
corresponding switch off; if the bit is zero, turn the corresponding switch on.
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Figure 3-3: Base Address Example
Using the Setup Program to Set the Base Address
The setup program provided on diskette with AD12-8 contains an interactive menu-driven program
to assist you in setting the base address. The following procedure demonstrates the use of the setup
program.
1. Choose a desired base address.
2. Execute the setup program by typing SETA12 and pressing the ENTER key.
3. Select the first item in the menu, 1) Set board address with the up or down arrow key and
press ENTER.
4. Enter the desired base address in hex, the program will display a graphic representation of how
you should set the switches. You may press the space bar to try another address.
5. Set DIP switch S1 as shown on the graphic representation.
