diff options
| author | bde <bde@FreeBSD.org> | 1998-05-31 11:16:09 +0000 |
|---|---|---|
| committer | bde <bde@FreeBSD.org> | 1998-05-31 11:16:09 +0000 |
| commit | 7b0392464e39393404685f728bcf5aee8ef68022 (patch) | |
| tree | 8cdb97fc89a675817beaee14c6c463ceef061b43 /share/man/man4/sio.4 | |
| parent | ec6c6de5c612defe38320b5ec39ff98ed7c8ac7c (diff) | |
| download | FreeBSD-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.4 | 13 |
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 |
