Chapter 1
– 29 –
PCI-1721 User’s Manual
Advantech Co., Ltd.
www.advantech.com
Appendix C. Register Structure and
Format
C.1 Overview
The PCI-1721 is delivered with an easy-to-use 32-bit DLL driver for
user programming under the Windows 95/98/NT/2000 operating
system. We advise users to program the PCI-1721sing the 32-bit DLL
driver provided by Advantech to avoid the complexity of low-level
programming by register.
The most important consideration in programming the PCI-1721 the
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.
C.2 I/O Port Address Map
The PCI-1721 requires 32 consecutive 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.
The table C-1 shows the function of each register of the PCI-1721 or
driver and its address relative to the card’s base address.
Appendix
C
