Applies To:
  • CitectSCADA 1.00, 1.01, 1.10, 1.11, 1.20, 2.00, 2.01

Summary:
The following is a list of the IBM Standard interrupt usage. 

Solution:
IRQ Use
0 Timer Click
1 Keyboard
2 Used by System (Also DSI Cards) (Don't use this setting)
3 Com 2 (can use if there is no com 2)
4 Com 1
5 LPT 2 (fine to use on about 99% of systems)
6 Floppy disk
7 LPT1
8 Real Time Clock
9 Redirected IRQ2 (Don't use this setting)
10 Reserved (You can use this setting)
11 Reserved (You can use this setting)
12 Reserved (You can use this setting)
13 Maths Co-Processor
14 Hard Disk
15 Reserved (You can use this setting)

If you use 10, 11, 12, 15, monitor your system for anything strange happenings. If you do use IRQ9, your system may work fine for a random period, then fail. 


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