.TH outb() "" "" "DDI/DKI Kernel Routine"
.PC "Output a byte to an I/O port"
.B "#include <sys/types.h>"
\fBvoid outb(\fIport\^\fB, \fIc\^\fB)\fR
\fBint \fIport\fB; uchar_t \fIc\^\fB;\fR
.PP
.B outb()
writes byte
.I c
to
.IR port .
.SH "See Also"
.B
DDI/DKI kernel routines,
inb(),
inl(),
inw(),
outl(),
outw()
.R
.SH Notes
.B outb()
has base or interrupt level.
It does not sleep.
.PP
A driver can hold a
driver-defined basic lock, read/write lock, or sleep lock
across a call to this function.
.PP
This function is meaningful only on implementations that support I/O-mapped I/O.
