> > Sorry for my ignorance, but the typical conectors: mouse, keyboard,
> > /dev/ttyS0, /dev/ttyS1, /dev/lp0...aren't isa devices?
>
> The PS/2 mouse and the keyboard (or the 8042, actually) are motherboard
> devices using the 0x00-0xff range of I/O ports -- ISA is above that.
outb to 0x80, and watch it go to ISA. Not all ports < 0x80 are mainboard.
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