IRQ Crib Sheet
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IRQs can be difficult to remember. This the way
the professionals do it.
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| 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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