'\" te
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.TH OUTB 9F "Oct 24, 2012"
.SH NAME
outb, outw, outl \- write to an I/O port
.SH SYNOPSIS
.nf
#include <sys/ddi.h>
#include <sys/sunddi.h>

\fBvoid\fR \fBoutb\fR(\fBint\fR \fIport\fR, \fBunsigned char\fR \fIvalue\fR);
.fi

.LP
.nf
\fBvoid\fR \fBoutw\fR(\fBint\fR \fIport\fR, \fBunsigned short\fR \fIvalue\fR);
.fi

.LP
.nf
\fBvoid\fR \fBoutl\fR(\fBint\fR \fIport\fR, \fBunsigned long\fR \fIvalue\fR);
.fi

.SH INTERFACE LEVEL
The functions described here are obsolete. For the \fBoutb()\fR, \fBoutw()\fR,
and \fBoutl()\fR functions use, respectively, \fBddi_put8\fR(9F),
\fBddi_put16\fR(9F), and \fBddi_put32\fR(9F) instead.
.SH PARAMETERS
.ne 2
.na
\fB\fIport\fR\fR
.ad
.RS 9n
A valid \fBI/O\fR port address.
.RE

.sp
.ne 2
.na
\fB\fIvalue\fR\fR
.ad
.RS 9n
The data to be written to the \fBI/O\fR port.
.RE

.sp
.ne 2
.na
\fB\fIaddr\fR\fR
.ad
.RS 9n
The address of a buffer from which the values will be fetched.
.RE

.sp
.ne 2
.na
\fB\fIcount\fR\fR
.ad
.RS 9n
The number of values to be written to the \fBI/O\fR port.
.RE

.SH DESCRIPTION
These routines write data of various sizes to the \fBI/O\fR port with the
address specified by \fIport\fR.
.sp
.LP
The \fBoutb()\fR, \fBoutw()\fR, and \fBoutl()\fR functions write 8 bits, 16
bits, and 32 bits of data respectively, writing the data specified by
\fIvalue\fR.
.sp
.SH CONTEXT
These functions may be called from user, interrupt, or kernel context.
.SH ATTRIBUTES
See \fBattributes\fR(7) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Architecture	x86
_
Interface Stability	Obsolete
.TE

.SH SEE ALSO
.BR isa (5),
.BR attributes (7),
.BR ddi_put16 (9F),
.BR ddi_put32 (9F),
.BR ddi_put8 (9F),
.BR inb (9F)
.sp
.LP
\fIWriting Device Drivers\fR