Measurement Computing PC104-DIO48 - Manual (Page 5)

1 SOFTWARE INSTALLATION
The board has switches and jumpers to set before installing the board in
your computer. By far the simplest way to configure your board is to use
the InstaCal
TM program provided as part of your software package.
InstaCal TM will show you all available options, how to configure the
various switches and jumpers (as applicable) to match your application
requirements, and will create a configuration file that your application
software (and the Universal Library) will refer to so the software you use
will automatically know the exact configuration of the board.
Please refer to the Extended Software Installation Manual regarding the
installation and operation of InstaCal
TM . The following hard copy
information is provided as a matter of completeness, and will allow you
to set the hardware configuration of the board if you do not have
immediate access to InstaCal
TM and/or your computer.
2 HARDWARE INSTALLATION
2.1 BASE ADDRESS
The PC104-DIO48 employs the PC bus for power, communications and
data transfer. As such it draws power from the PC, monitors the address
lines and control signals and responds to it's I/O address, and it receives
and places data on the eight data lines.
The base address is the starting location that software writes to and reads
from.
The base address
switch is the means for
setting the base
address. Each switch
position corresponds to
one of the PC bus
address lines. The
down position activates
that address bit.
Figure 2-1. Base Address Switches
1
1 2 3 4 5 6 7
SWITCH HEX
1 200
2 100
3 80
4 40
5 20
6 10
7 08
BASE ADDRESS SWITCHES – 300h Shown.