.\" Copyright (c) 2002 John Hay.
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.\" $FreeBSD: src/share/man/man4/puc.4,v 1.1.2.1 2002/03/07 17:48:38 jhay Exp $
.\" $DragonFly: src/share/man/man4/puc.4,v 1.2 2003/06/17 04:36:59 dillon Exp $
.\"
.Dd February 7, 2002
.Dt PUC 4
.Os
.Sh NAME
.Nm puc
.Nd PCI ``Universal'' Communications driver
.Sh SYNOPSIS
.Cd device pci
.Cd device puc
.Cd device sio
.Cd options PUC_FASTINTR
.Sh DESCRIPTION
This driver acts as a shim to connect pci serial ports to the
.Xr sio 4
driver.
.Pp
The list of supported devices is in 
.Em src/sys/dev/puc/pucdata.c.
Support for new cards should be added there.
.Pp
If the PUC_FASTINTR option is used the driver will try to use fast interrupts.
This should lower the interrupt latency and should be used if the
.Xr sio 4
driver reports
.Em silo overflow
errors.
It cannot be used if the interrupt is shared.
.Sh SEE ALSO
.Xr sio 4
.Sh HISTORY
This driver took the idea from the
.Nx
.Xr puc 4
driver and still use the same structure to describe cards to ease exchanging
card info.
.Sh BUGS
Only serial ports are supported through the
.Xr sio 4
driver at the moment.
Someone should write support for parallel ports using the
.Xr lpt 4
driver.