Re: Q: outb, outw et al?

H. Peter Anvin (hpa@transmeta.com)
23 Aug 1998 04:35:11 GMT

Followup to: <Pine.SGI.3.96.980822214842.8205L-100000@rhys.mcs.anl.gov>
By author: "Ivan R. Judson" <judson@mcs.anl.gov>
In newsgroup: linux.dev.kernel
>
> Ok,
>
> There was such fast complete response to my kerneld question, time for the
> next:
>
> Where can I find detailed documentation on the outb, inb, outw, inw and
> other icky functions I'll need to read and write data to the ISA board I
> have?
>
> I've read asm/io.h, but it's fairly obfuscated, at least to me...
>

out[bwl][_p](data, port)
data = in[bwl][_p](port)

b = byte (8 bits), w = word (16 bits), l = longword (32 bits)
_p means add a brief pause after doing the I/O.

-hpa

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