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18 PCI-1720 User's Manual

4.1 Overview

The PCI-1720 is delivered with an easy-to-use 32-bit DLL driver for

user programming under the Windows 95/98/NT operating system.

We advise users to program the PCI-1720 using the 32-bit DLL driver

provided by Advantech to avoid the complexity of low-level pro-

gramming by register.

The most important consideration in programming the PCI-1720 card

at a register level is to understand the function of the card’s registers.

The information in the following sections is provided only for users

who would like to do their own low-level programming.

4.2 I/O Port Address Map

The PCI-1720 requires 10 addresses in the PC’s I/O space. The

address of each register is specified as an offset from the card’s base

address. For example, BASE + 0 is the card’s base address and BASE

+ 7 is the base address plus seven bytes.

Table 4-1 shows the function of each register and its address relative

to the card’s base address.

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 35 36

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