9 clear interrupt register, 10 timer/counter register, 11 high level programming – ADLINK PCI-7396 User Manual
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• Registers Format
3.9 Clear Interrupt Register
Users can write anything to this register to clear the interrupt request of the
PCI-7396.
Address: BASE + 54h
Attribute: write only
Data Format:
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.