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IRQ Crib Sheet

IRQs can be difficult to remember.  This the way the professionals do it.
Just remember this single code: 323232-FFEE77
Then put the first set of numbers in a column.
3
2
3
2
3
2
Now put the second set in a column to the right.
3F
2F
3E
2E
37
27
Now add the number 8 to each one
3F8
2F8
3E8
2E8
378
278
In order, those are the addresses for COM 1-4 and LPT 1 and 2.
COM1: 3F8
COM2: 2F8
COM3: 3E8
COM4: 2E8
LPT1: 378
LPT2: 278
You are usually given some paper to jot notes down.  .
Before you begin, write all this down, then you are prepared for all the questions you get on IRQs
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