gossamer axe wrote:
and COM2 is an odd IRQ. I believe IRQ 1 and 2 are reserved, so 3 & 4 were
and easy way to remember it. 9 was usually open, and I seem to remember 7
also, but again, I am probably wrong about that. It's been a while since
fiddling with IRQs.
ahh, IRQs... Off the top of my head:
0: system timer
1: keyboard
2: cascade to high irq (8-15)
3: serial1, serial3
4: serial0, serial2
5: parallel1 (or sound/spare)
6: floppy
7: parallel0
8: real-time clock
9: ACPI/spare (sometimes video)
10: spare (sometimes video)
11: spare (sometimes video)
12: ps/2 aux port (mouse)
13: floating point unit
14: IDE 0
15: IDE 1
yeah, so just like the number of GPRs in the x86 architecture, it's CPU
interrupt architecture sucks just as bad, being that there were really
only 3-4 spare IRQs for hardware that wasn't already in the box. How
this architecture caught on I'll never know. *sigh* Vectored interrupt
tables, anyone?
-kelsey
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