Registers Format
•
19
Bit
7
6
5
4
3
2
1
0
BASE+54h
x
x
x
x
x
x
x
x
BASE+55h
x
x
x
x
x
x
x
x
BASE+56h
x
x
x
x
x
x
x
x
BASE+57h
x
x
x
x
x
x
x
x
3.10 Timer/Counter Register
The 8254 chip occupies 4 I/O addresses in the PCI-7396. Please refer
to NEC's or Intel's data sheet for the full description of the 8254
operation.
Address : BASE + 40h ~ BASE + 4Ch
Attribute :
read / write
Data Format :
Base + 40h
Bit 7~Bit 0: Counter 0 Register
Base + 44h
Bit 7~Bit 0: Counter 1 Register
Base + 48h
Bit 7~Bit 0: Counter 2 Register
Base + 4Ch
Bit 7~Bit 0: Control Register
3.11 High Level Programming
To operate the PCI-7396 quickly, you can bypass the detailed register
structures and use the high-level application programming interface
(API) directly. The DOS library for Borland C/C++ is included in the
ADLINK CD. Please refer to chapter 5 for more detailed information.
