diff options
Diffstat (limited to 'share/man/man4/man4.hppa/harmony.4')
| -rw-r--r-- | share/man/man4/man4.hppa/harmony.4 | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/share/man/man4/man4.hppa/harmony.4 b/share/man/man4/man4.hppa/harmony.4 index ae897c1a340..55321638e24 100644 --- a/share/man/man4/man4.hppa/harmony.4 +++ b/share/man/man4/man4.hppa/harmony.4 @@ -1,4 +1,4 @@ -.\" $OpenBSD: harmony.4,v 1.5 2003/06/02 18:51:33 jason Exp $ +.\" $OpenBSD: harmony.4,v 1.6 2003/08/20 18:43:24 mickey Exp $ .\" .\" .\" Copyright (c) 2003 Jason L. Wright (jason@thought.net) @@ -60,14 +60,30 @@ models .Nm also provides two additional channels for an add-on card with two fax/voice/modems. +.Pp +One of the hardware registers reflects the state of the +.Tn CHI +bus that is used to communicate with the codec and thus +being sampled at a low accuracy secondary frequency +(such as +.Xr timeout 9 ) +produces poor quality random bit stream that is fed into the +entropy pool of +.Xr random 4 . .Sh SEE ALSO .Xr ioctl 2 , .Xr audio 4 , .Xr gsc 4 , -.Xr intro 4 +.Xr intro 4 , +.Xr random 4 .Sh HISTORY .Ox support for .Nm first appeared in .Ox 3.3 . +.Sh CAVEATS +To trigger entropy collection +.Tn CHI +bus has to be programmed into the data mode that happens once +a single buffer of data has been played or recorded. |