summaryrefslogtreecommitdiffstats
path: root/share/man/man4/sio.4
diff options
context:
space:
mode:
authorbde <bde@FreeBSD.org>1998-05-31 11:16:09 +0000
committerbde <bde@FreeBSD.org>1998-05-31 11:16:09 +0000
commit7b0392464e39393404685f728bcf5aee8ef68022 (patch)
tree8cdb97fc89a675817beaee14c6c463ceef061b43 /share/man/man4/sio.4
parentec6c6de5c612defe38320b5ec39ff98ed7c8ac7c (diff)
downloadFreeBSD-src-7b0392464e39393404685f728bcf5aee8ef68022.zip
FreeBSD-src-7b0392464e39393404685f728bcf5aee8ef68022.tar.gz
Undocumented flags which went away a few minutes ago.
Undocumented auto FIFO trigger level adjustment which went away years ago.
Diffstat (limited to 'share/man/man4/sio.4')
-rw-r--r--share/man/man4/sio.413
1 files changed, 3 insertions, 10 deletions
diff --git a/share/man/man4/sio.4 b/share/man/man4/sio.4
index b65e424..8ec49a0 100644
--- a/share/man/man4/sio.4
+++ b/share/man/man4/sio.4
@@ -34,7 +34,7 @@
.\"
.\" from: @(#)dca.4 5.2 (Berkeley) 3/27/91
.\" from: com.4,v 1.1 1993/08/06 11:19:07 cgd Exp
-.\" $Id: sio.4,v 1.24 1997/05/18 21:24:04 phk Exp $
+.\" $Id: sio.4,v 1.25 1997/09/14 18:55:41 joerg Exp $
.\"
.Dd October 10, 1995
.Dt SIO 4 i386
@@ -84,12 +84,8 @@ device is potential system console
device is forced to become system console
.It 0x00040
device is reserved for low-level IO (e. g. for remote kernel debugging)
-.It 0x00080
-enable diagnostics in probe
.It 0x0 Ns Em ?? Ns 00
minor number of master port
-.It 0x10000
-disable test#3 which often fails for internal modems
.It 0x20000
device is assumed to use a 16650A-type (extended FIFO) chip
.El
@@ -147,12 +143,9 @@ The
keyword may be used on each
.Em device sio
line in the kernel configuration file
-to silence the probe
-or to disable the FIFO on 16550A UARTs
+to disable the FIFO on 16550A UARTs
(see the synopsis).
-Disabling the FIFO should rarely be necessary
-since the driver automatically adjusts the receiver
-FIFO trigger level for low latency and high efficiency.
+Disabling the FIFO should rarely be necessary.
.Pp
The
.Em flags
OpenPOWER on IntegriCloud